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Nacho Zve De La Torre's questions

Martin Hope
Nacho Zve De La Torre
Asked: 2020-02-26 06:05:04 +0800 CST
  • 1

I have the following problem, I need to send the response of a request to the view and I don't know how to do it since I am new with Node. I looked everywhere but found nothing.

var app = require('express')();
var http = require('http').Server(app);
var rp = require('request-promise');

var options = {
  uri: 'http://tapas.clarin.com/tapa/1990/02/22/19900222_thumb.jpg',

  headers: {
      'User-Agent': 'Request-Promise'
  },
  json: true // Json parse
};

rp(options)
  .then( res => {
    console.log(res)
  })
  .catch(function (err) {
      console.log(err)
  });

http.listen(3000, function(){
  console.log('listening on localhost:3000');
});

Printing this line gives console.log(res)me the binary image on the console, but what I need is to send that image to the view to be displayed. Any idea how to achieve it?

My view is very simple:

<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Tapas Clarin</title>
</head>
<body>

    <div id="tapas">
        <!-- Acá quiero mostrar la imagen -->
    </div>
    <script src="./app.js"></script>
</body>
</html>

Thank you very much

nodejs
Martin Hope
Nacho Zve De La Torre
Asked: 2020-02-21 13:13:53 +0800 CST
  • 4

I am following a tutorial where I have the following class method:

incrementarScore() {
    this.setState({
        score: this.state.score += 1
    });
}

The code above works perfect.

If I change the line inside the setState() method to this:

score: this.state.score += 1

Also works

but if I change it to this:

score: this.state.score ++

It no longer works, which seems more than strange to me.

Could someone explain to me why?

reactjs
Martin Hope
Nacho Zve De La Torre
Asked: 2020-11-27 08:53:38 +0800 CST
  • 3
/* Validar checkboxes clickeados */
var checkboxes = document.querySelectorAll('.single-checkbox');
var clickeados = new Array();

checkboxes.forEach(elem => {
    elem.addEventListener('change', (event) => {
        event.stopPropagation();
        if(elem.checked) {
           if(!clickeados.includes(elem)){
                   clickeados.push(elem);
//                   console.log(clickeados);
           }
        }
        else{
            if(clickeados.includes(elem)){
                   clickeados.pop(elem);
//                   console.log(clickeados);
            }
        }
    });
});

/* Validar cuantos gustos fueron seleccionados antes de hacer el submit */
$('#vasitoForm').on('submit', (event) => {
    if(clickeados.length == 0){
        event.preventDefault();
        document.getElementById("errorGustos").innerHTML = "Debe seleccionar por lo menos un gusto";
    }
    else if(clickeados.length > 0 && clickeados.length < 3){
    console.log(clickeados);
        var myArray = JSON.stringify(clickeados);
//        $('#vasitoForm').attr('action', myArray + '/pedido');
        console.log(myArray);
    }
});

The console.log(clickeados) prints me the array of input's perfectly, but when I want to convert it to JSON and print it again the JSON comes out empty...

Array [ input.single-checkbox ] home.js:59:5

[{}] home.js:62:9

javascript
Martin Hope
Nacho Zve De La Torre
Asked: 2020-11-27 08:02:16 +0800 CST
  • 1

I'm having a lot of trouble doing what I need.

I will explain the code and the problem:

enter image description here

The user must choose the flavors of ice cream they want by clicking on the checkboxes in the image and then submit the order using the "Submit Order" button.

<!-- Modal -->
<div id="vasoModal" class="modal">
    <div class="modal-content">
        <h4 class="modal-title">Vasito</h4>
        <h6>Seleccione hasta dos gustos</h6>
        <form id="vasitoForm" method="post">
            <table class="tabla">
                    <tr th:each="gusto : ${gustos}">
                        <td class="flavour" th:text="${gusto.nombre}"></td>
                        <td><input class="single-checkbox" type="checkbox" th:value="${gusto.id}"/></td>
                    </tr>
            </table>
            <p id="errorGustos"></p>
            <button type="submit" class="btn-submit">Enviar Pedido</button>
        </form>
    </div>
</div>

My JavaScript code validates which likes were clicked and saves them in an array. It should then POST that array to the Java driver.

/* Validar checkboxes clickeados */
var checkboxes = document.querySelectorAll('.single-checkbox');
var clickeados = [];

checkboxes.forEach(elem => {
    elem.addEventListener('change', (event) => {
        event.stopPropagation();
        if(elem.checked) {
           if(!clickeados.includes(elem)){
                   clickeados.push(elem);
                   console.log(clickeados);
           }
        }
        else{
            if(clickeados.includes(elem)){
                   clickeados.pop(elem);
                   console.log(clickeados);
            }
        }
    });
});

/* Validar cuantos gustos fueron seleccionados antes de hacer el submit */
$('#vasitoForm').on('submit', (event) => {
    if(clickeados.length == 0){
        event.preventDefault();
        document.getElementById("errorGustos").innerHTML = "Debe seleccionar por lo menos un gusto";
    }
    else if(clickeados.length > 0 && clickeados.length < 3){
        $('#vasitoForm').attr('action', clickeados + '/pedido');
    }
});

The message is done but the Spring controller receives the array as "[object HTMLInputElement]" and not as an array for me to validate....

Here I am stuck, I don't know how to validate the array data from the controller (the checkboxes that were clicked) so that I can later show the selected likes to the user in a new page.

Any ideas ?

This is the controller code, but I don't think it's right because it doesn't work for me:

    @RequestMapping(value="{gustos}/pedido", method = RequestMethod.POST)
    public void pedido(HttpServletRequest request) {

        Map<String, String[]> dataFeed = request.getParameterMap();

        for (Map.Entry<String, String[]> entry : dataFeed.entrySet()) {
            for (String str : request.getParameterValues(entry.getKey())) {
                int gustoId = Integer.parseInt(entry.getKey());
                Gusto gusto = gustoService.findGustoById(gustoId);
                System.out.println(gusto.toString());
//                if (str.equals("some-value")) { // where some-value is value="some-value" on your checkbox
//                    // do something with the gusto
//
            }
        }
    }
javascript
Martin Hope
Nacho Zve De La Torre
Asked: 2020-11-27 06:17:29 +0800 CST
  • 2

I'm trying to do a simple submit() through JavaScript but in the console I get a "too much recursion" error and the program stops there.

I am trying to validate the clicks within a modal and save the clicked input's in an array, if the array then meets certain conditions the submit is done, otherwise an error message is output to the user.

/* Validar checkboxes clickeados */
var checkboxes = document.querySelectorAll('.single-checkbox');
var clickeados = [];

checkboxes.forEach(elem => {
    elem.addEventListener('change', (event) => {
        event.stopPropagation();
        if(elem.checked) {
           if(!clickeados.includes(elem)){
                   clickeados.push(elem);
                   console.log(clickeados);
           }
        }
        else{
            if(clickeados.includes(elem)){
                   clickeados.pop(elem);
                   console.log(clickeados);
            }
        }
    });
});

/* Validar cuantos gustos fueron seleccionados antes de hacer el submit */
$('#vasitoForm').on('submit', (event) =>
    if(clickeados.length == 0){
        event.preventDefault();
        document.getElementById("errorGustos").innerHTML = "Debe seleccionar por lo menos un gusto";
    }
    else if(clickeados.length > 0 && clickeados.length < 3){
        $('#vasitoForm').submit();
    }
});

The preventDefault() works fine if nothing is clicked and it shows the error message without redirecting, but when I have input's clicked and do the submit() I get the "too much recursion" message on the console!

The HTML is as follows:

<!-- Modal -->
<div id="vasoModal" class="modal">
    <div class="modal-content">
        <h4 class="modal-title">Vasito</h4>
        <h6>Seleccione hasta dos gustos</h6>
        <form th:action="@{/pedido}" id="vasitoForm" method="post">
            <table class="tabla">
                    <tr th:each="gusto : ${gustos}">
                        <td class="flavour" th:text="${gusto.nombre}"></td>
                        <td><input class="single-checkbox" type="checkbox" th:value="${gusto.id}"/></td>
                    </tr>
            </table>
            <p id="errorGustos"></p>
            <button type="submit" class="btn-submit">Enviar Pedido</button>
        </form>
    </div>
</div>

Any idea why this happens and how it can be fixed?

javascript
Martin Hope
Nacho Zve De La Torre
Asked: 2020-11-22 09:35:50 +0800 CST
  • 0

It is a simple thing that is taking me a lot of time.

I want to open a modal when clicking on any product image:

enter image description here

This is the HTML of the page:

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8"/>
    <meta name="viewport" content="width=device-width, initial-scale=1"/>

    <link rel="icon" th:href="@{/favicon_heladeria.png}" />

    <link rel="stylesheet" th:href="@{/vendor/materialize/css/materialize.css}" />
    <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons" />
    <link rel="stylesheet" th:href="@{/app.css}" />

    <title>Copito de Nieve | Home</title>
</head>
<body>
    <div class="navbar-fixed">
        <nav>
            <div class="container">
                <a th:href="@{/}" class="brand-logo">Heladeria</a>
                <a href="#" data-activates="mobile-nav" class="button-collapse right"><i class="material-icons">menu</i></a>
                <ul class="right hide-on-med-and-down">
                    <li class="active"><a th:href="@{/}">Home</a></li>
                    <li><a th:href="@{/gustos}">Gustos</a></li>
                    <li><a th:href="@{/ingresar}">Ingresar</a></li>
                </ul>
                <ul id="mobile-nav" class="side-nav">
                    <li class="active"><a th:href="@{/}">Home</a></li>
                    <li><a th:href="@{/gustos}">Gustos</a></li>
                    <li><a th:href="@{/ingresar}">Ingresar</a></li>
                </ul>
            </div>
        </nav>
    </div>
    <div class="search-bar container">
        <div class="row">
            <div class="col s12">
                <form action="#" method="get">
                    <div class="input-field">
                        <input name="q" type="search" placeholder="Buscar todos los helados..." required="required" autocomplete="off"/>
                        <i class="material-icons">search</i>
                    </div>
                </form>
            </div>
        </div>
    </div>
    <div>
        <h2 class="mid-title">Productos</h2>
    </div>
    <div class="helados container">
        <div class="row">
            <div th:each="producto : ${productos}" class="col s12 l4">
                <img id="prod-img" th:src="@{'/images/' + ${producto.nombre} +'.png'}" />
                <p class="product-name" th:text="${producto.nombre}"></p>
                <p class="desc" th:text="${producto.descripcion}"></p>
            </div>
        </div>
    </div>
    <!-- Modal -->
    <div id="prodModal" class="modal">
        <div>
            <div class="modal-content">
                <h4 class="modal-title">Haga su pedido</h4>
                <p class="flavour" th:each="gusto : ${gustos}" th:text="${gusto.nombre}"></p>
            </div>
        </div>
    </div>

<script th:src="@{/vendor/jquery/jquery-1.11.3.js}"></script>
<script th:src="@{/vendor/materialize/js/materialize.js}"></script>
<script th:src="@{/home.js}"></script>
</body>
</html>

Clicking the modal opens with all the ice cream flavors from the database as expected, the problem is that it opens whenever you click anywhere on the page and not when you click on the images, which is how it should open

This is my JS:

 var prodImages = document.querySelectorAll('#prod-img');
console.log(prodImages);
prodImages.forEach(elm => {
      addEventListener('click', () => {
      var element = document.querySelector('#prodModal');
      var modal = M.Modal.init(element, {});
      modal.open();
    }, false);
});

I'm using the materialize library and I think the materialize.js is the one doing the mess.

javascript
Martin Hope
Nacho Zve De La Torre
Asked: 2020-11-21 09:59:07 +0800 CST
  • 0

My problem is the following: I need to obtain the ID of a credential when clicking on a button, but given the structure I have, I don't know how to deal with the problem.

Controller method that receives the request.

@RequestMapping(value = "/fisicHost/{id}/credentials", method = RequestMethod.GET, produces = APPLICATION_JSON_UTF8_VALUE)
public List<Credential> credentialsByFisicHost(@PathVariable(value = "id") final Long fisicHostId, ModelMap modelMap){
    FisicHost optionalFisicHost = fisicHostDao.findById(fisicHostId);

    if (optionalFisicHost == null) {
        // Responder con 404
    }
    FisicHost fisicHost = optionalFisicHost;
    return fisicHost.getCredentials();
}

HTML:

<!-- Modal -->
<div class="modal fade" id="credentialsModal" tabindex="-1" role="dialog" aria-hidden="true">
    <div class="modal-dialog modal-dialog-centered" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="modal-title">Credenciales</h5>
            </div>
            <div class="modal-body">
                <table id="credentialsTable">
                    <tr class="row">
                        <th id="modal-user">Usuario</th>
                        <th id="modal-pass">Clave</th>
                        <th id="modal-notes">Notas</th>
                    </tr>
                </table>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-dismiss="modal">Cerrar</button>
            </div>
        </div>
    </div>
</div>

JS:

$(".credentialsButton").click(function(){

    var fisicHostId = $(this).data('fisic-host-id');
    $.get( "/fisicHost/" + fisicHostId + "/credentials", data => {
        console.log(data);

        $('#credentialsTable').empty();

//        var user = document.createElement('th');
//        user.textContent = "USUARIO";

        for (i = 0; i < data.length; ++i) {
            var fisicHost = data[i];

            var new_row = document.createElement('tr');
            new_row.className = "row fisichost";

            var userCol = document.createElement('td');
            userCol.textContent = fisicHost["user"];
            new_row.append(userCol);

            var passwordCol = document.createElement('td');
            passwordCol.textContent = fisicHost["password"];
            new_row.append(passwordCol);

            var notesCol = document.createElement('td');
            notesCol.textContent = fisicHost["notes"];
            new_row.append(notesCol);

            var editButton = document.createElement('button');
            editButton.textContent = "EDITAR"
            new_row.append(editButton);

            var deleteButton = document.createElement('button');
            deleteButton.id = buttonId;
            deleteButton.textContent = "BORRAR"
            new_row.append(deleteButton);

            $("#credentialsTable").append(new_row);

  // ACA ESTA EL TEMA

            $(deleteButton).on('click', () => {
                var credentialId = fisicHost["id"];
                console.log(credentialId);
//            $.post( "/fisicHost/" + credentialId + "/credentials", data => {});
            });
        }

        $('#credentialsModal').modal('show');

    }).fail(function(xhr, status, error) {
        console.error(error);
        alert('No se pudieron cargar las credenciales.');
    });
});

$('#credentialsModal').bind('hide', function () {
   $('#credentialsModal tr.fisichost').remove();
});

enter image description here

When the user clicks on the DELETE button that can be seen in the image of the modal, I want to obtain the ID of that credential to be able to use it in the back-end.

The problem is that whenever I click on the button, it takes the ID of the last loaded credential, you see that it goes through the entire for() and then takes the ID of the last one, when what I want is for it to take the ID of the credential on which the button was clicked. That is, if the delete button of credential two is clicked, I take ID 2, not the last one.

In the console, the data object (which is the credentials) in this case looks like this:

[…]
0: {…}
id: 2
notes: "notas"
password: "pass"
role: "null"
user: "usuario"
__proto__: Object { … }
1: {…}
id: 3
notes: "notasssss"
password: "pass"
role: "null"
user: "usuario"
__proto__: Object { … }
length: 2
javascript
Martin Hope
Nacho Zve De La Torre
Asked: 2020-10-30 05:07:22 +0800 CST
  • 1

I have a <select>with several <option>that take different values ​​as the user chooses a different one. The problem is that the first option will never take its value unless the user triggers the 'change' event, that is, first chooses another option from the list and then chooses the first option again.

JQuery:

$('#categorias').on('change', () => {
    var value = $('#categorias').val();
    if(value === "Dulces de Leche") {
        $('#idCategoria').val(1);
    }
    else if(value === "Cremas") {
        $('#idCategoria').val(2);
    }
    else if(value === "Chocolates") {
        $('#idCategoria').val(3);
    }
    if(value === "Frutales") {
        $('#idCategoria').val(4);
    }
});

HTML:

<div class="col s12 l8">
                <!-- TODO: Hacer una clase aparte para hacer esto dinámico -->
                <input id="idCategoria" th:value="0" th:field="*{idCategoria}" hidden="hidden"/>
                <select id="categorias" th:field="*{categoria}">
                    <option value="" disabled="disabled">Categoria</option>
                    <option value="Dulces de Leche">Dulce de Leche</option>
                    <option value="Cremas">Cremas</option>
                    <option value="Chocolates">Chocolates</option>
                    <option value="Frutales">Frutales</option>
                </select>
            </div>

What event can I use here to have the same functionality but that the first option also takes its value in case the user submits directly, without first having chosen another option?

javascript
Martin Hope
Nacho Zve De La Torre
Asked: 2020-10-20 11:43:50 +0800 CST
  • 1

I ask the question again because with all the answers they gave me I still couldn't solve the problem, which also seems super strange to me because several of the answers have a lot of logic!

What I need?

Open a modal when you click on an image and then have the modal close only when you click outside of it.

What do I use?

Materialize and JQuery and Thymeleaf (but shouldn't affect anything)

HTML code:

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8"/>
    <meta name="viewport" content="width=device-width, initial-scale=1"/>

    <link rel="icon" th:href="@{/favicon_heladeria.png}" />

    <link rel="stylesheet" th:href="@{/vendor/materialize/css/materialize.css}" />
    <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons" />
    <link rel="stylesheet" th:href="@{/app.css}" />

        <h2 class="mid-title">Nuestros Helados</h2>
    </div>
    <div class="helados container">
        <div class="row">
            <div class="col s12 l4" id="chocoDiv">
                <a class="modal-trigger" href="#chocolateModal">
                <img class="tastes" th:src="@{/images/chocolate.png}" />
                </a>
                <span class="taste-name">CHOCOLATES</span>
            </div>
            <div class="col s12 l4">
                <img class="tastes" th:src="@{/images/crema.png}" />
                <a href="#"></a>
                <span class="taste-name">CREMAS</span>
            </div>
            <div class="col s12 l4">
                <img class="tastes" th:src="@{/images/dulceDeLeche.png}" />
                <a href="#"></a>
                <span class="taste-name">DULCE DE LECHES</span>
            </div>
            <div class="col s12 l4">
                <img class="tastes" th:src="@{/images/frutales.png}" />
                <a href="#"></a>
                <span class="taste-name">FRUTALES</span>
            </div>
        </div>
    </div>
    <!-- Modal -->
    <div id="chocolateModal" class="modal">
        <div>
            <div class="modal-content">
                <h4 class="modal-title">Chocolates</h4>
            </div>
        </div>
    </div>
    <script th:src="@{/vendor/jquery/jquery-1.11.3.js}"></script>
    <script th:src="@{/vendor/materialize/js/materialize.min.js}"></script>
    <script th:src="@{/app.js}"></script>
</body>
</html>

I leave the comments so you can see the other options I tried without achieving anything useful :(

JS code:

$(function(){
    // Activate mobile nav
    $(".button-collapse").sideNav({edge: 'right'});
});

//  $(document).ready( () =>{
//    $('.modal').modal();
//  });

// ESTE FUE EL ÚNICO QUE ANDUVO (Pero luego no lo puedo cerrar)

//$('#chocoDiv').on('click', () => {
//    $('#chocolateModal').show();
//});

document.querySelector('#chocoDiv').addEventListener('click', () => {
  var element = document.querySelector('#chocolateModal');
    var modal = M.Modal.init(element, {});
    modal.open();
});

//$(document).ready(function(){
//    $('.modal').modal();
//  });

Any idea what I may be doing wrong? It is rare that neither option works well!

javascript
Martin Hope
Nacho Zve De La Torre
Asked: 2020-10-20 10:19:40 +0800 CST
  • 1

I need my images to have a text above with the description of each of them! I tried to touch the CSS positions and it works fine with 3 of the 4, in the fourth image everything falls apart, I don't know why :(

HTML:

<div class="helados container">
    <div class="row">
        <div class="col s12 l4">
            <img th:src="@{/images/chocolate.png}" />
            <a href="#"></a>
        </div>
        <div class="col s12 l4">
            <img th:src="@{/images/crema.png}" />
            <a href="#"></a>
        </div>
        <div class="col s12 l4">
            <img th:src="@{/images/dulceDeLeche.png}" />
            <a href="#"></a>
        </div>
        <div class="col s12 l4">
            <img th:src="@{/images/frutales.png}" />
            <a href="#"></a>
        </div>
    </div>
</div>

CSS:

.helados {
        padding: 0 1.5rem;
    }
.helados img {
        width: 100%;
    }
  .container {
    width: 100%;
}

.helados.container {
    padding: 0;
}

.helados.container .col {
    padding: 0 0.75rem !important;
}

enter image description here

What I want to do is that in each of the images (above them) a simple text appears that says CHOCOLATE, FRUIT TREES, DULCE DE LECHE and CREAMS so that it looks more beautiful for the user.

Thank you total :)

css
Martin Hope
Nacho Zve De La Torre
Asked: 2020-10-20 04:57:09 +0800 CST
  • 1

The following program reads a txt file line by line:

BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(origin),"ISO-8859-1"));

                String strLine;
                while ((strLine = br.readLine()) != null)   {
                    if(strLine.contains("Fecha de Emision: ")){
                        String date = strLine.substring(84,93);
                        String[] parts = date.split("/");
                        try{
                            int day = Integer.parseInt(parts[0]);
                            if(day < 10){
                                SimpleDateFormat format = new SimpleDateFormat("MM/dd/YYYY");
                                String dateString = format.format(new Date(date));
                                String newDate = strLine.replace(date, dateString);
                                writer.write(newDate+"\n");
                            } else{
                            writer.write(strLine+"\n");
                            }
                        } catch(NumberFormatException nfe){
                            System.out.println("Problema al parsear el día de la fecha");
                            return;
                        }
                    } else{
                        writer.write(strLine+"\n");
                      }
                }
                br.close();

If in the line you are reading you find the String "Issuance Date" what should come next is the date itself (EXAMPLE: 12/06/2018). I am assuming that the date is between positions 84 and 93

String date = strLine.substring(84,93);

But it's not always like this.

What is fixed is that the date always starts two spaces after the String "Issuance Date".

Ask:

How do I tell my program to do that? That is, move two characters to the right from "Issue Date" to be able to later validate the date format and other things that I have already done !!!

From already thank you very much :)

java
Martin Hope
Nacho Zve De La Torre
Asked: 2020-10-18 11:14:17 +0800 CST
  • 2

I have the following program that reads a text file, changes the format of a specified date (Issue Date) and then writes everything back to a different file with the correct date format.

The issue is that when it rewrites the file it does it in UTF-8 and I need it to rewrite it in ISO_8859-1

How can I do this ?

public class DateFormater {

    public static void main(String[] args) throws IOException {

        if(args.length == 0){
            System.out.println("Faltan argumentos");
            return;
        }

        try {
            System.out.println("Leyendo Archivos de Configuración ... ");
            Configuration conf = new Configuration("../resources/Configuracion.json");

            final String origin = (String) conf.getJson().get("origen") +args[0];
            final String destiny = (String) conf.getJson().get("destino")+args[1];
            FileInputStream fstream = new FileInputStream(origin);
            FileWriter writer = new FileWriter(destiny);
            BufferedReader br = new BufferedReader(new InputStreamReader(fstream));
            String strLine;

            while ((strLine = br.readLine()) != null)   {
                if(strLine.contains("Fecha de Emision: ")){
                    String date = strLine.substring(83,93);
                    SimpleDateFormat format = new SimpleDateFormat("MM/dd/YYYY");
                    String dateString = format.format(new Date(date));
                    String newDate = strLine.replace(date, dateString);
                    writer.write(newDate+"\n");
                }
                else{
                    writer.write(strLine+"\n");
                }
            }
            br.close();
            writer.close();
            System.out.println("El programa ha finalizado con exito");
            System.out.println("El nuevo archivo ha sido generado en " + destiny);
        } catch (FileNotFoundException ex) {
            Logger.getLogger(DateFormater.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParseException ex) {
            Logger.getLogger(DateFormater.class.getName()).log(Level.SEVERE, null, ex);
        }
    }   
}
java
Martin Hope
Nacho Zve De La Torre
Asked: 2020-10-09 12:20:25 +0800 CST
  • 1

Problem :

I want to print the user's name, to greet him, if he is logged in to the page. If you are not logged in then I want the title to be the default title of the page.

Log in code:

<?php

include("conexion.php");

    unset($_SESSION['error']);

    if(!isset($_POST['usuario']) || !isset($_POST['contrasenia'])) {

    }else{

    $usuario     = $_POST["usuario"];
    $contrasenia = md5($_POST["contrasenia"]);

        if ($resultado = mysqli_query($link, "SELECT * from Usuarios where usuario='" . $usuario . "' and contrasenia='" . $contrasenia . "'")) {

            if (mysqli_num_rows($resultado) == 1) {
                $row = mysqli_fetch_assoc($resultado);

                if ($row['contrasenia'] == $contrasenia && $row['usuario'] == $usuario) {
                    session_start();
                    $_SESSION['usuario'] = $usuario;
                    header("Location: index.php");
                }
            } else {
                unset($_SESSION['usuario']);
                $_SESSION["error"] = "Usuario y/o contraseña incorrecta";   
            }  
        }
    }
?>

As you can see, when I do the LogIn and the username and password are correct, it redirects me to the index.php !!! So far so good, but in the index.php, in the title or label, if the session is NOT started I get this:

Notice: Undefined index: user in /var/www/html/PaginaFinal/php/index.php on line 24

And if it is started, I only get the name of the logged in user, but not the "Welcome + $username"...

Index.php code:

   <?php
        session_start();
   ?>

---- Follow the HTML -------

And he comes:

<h1 id="titulo"> <?php echo "Bienvenido ".isset($_SESSION["usuario"]) ? $_SESSION["usuario"] : "TIENDA X MAYOR";?></h1>

Okay, I'll explain again. What I want to do is that if the user is logged in, the H1 says "Welcome + the name of the user who logged in" .... if he is not logged in, I want it to say "Store X Mayor"

php
Martin Hope
Nacho Zve De La Torre
Asked: 2020-08-09 12:56:13 +0800 CST
  • 1

I imagine that there must be a default path where the Logs are saved when using the Java Logger. My questions are two:

1) What is that default route?

2) How do I specify a different one?

I am not using any external library (log4j), just Java 1.8.

import java.util.logging.Level;
import java.util.logging.Logger;
java
Martin Hope
Nacho Zve De La Torre
Asked: 2020-08-08 10:32:33 +0800 CST
  • 2

I have the following dilemma. Per day I have X number of folders in a directory that need to be moved to another directory to then back up those files. I'm creating a Java program to automate the process but I'm having trouble moving the folders (and the files inside them, in this case .tif images) to the new directory.

I have the following code that does not work for me since it generates a FileNotFoundException and tells me that my paths "ARE A DIRECTORY"; which is exactly what I'm wanting to move.

How can i fix this ??

package ilm.copy;

import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
*
* @author I de la Torre
*/
public class ILMCopy {
/**
 * @param args the command line arguments
 */
public static void main(String[] args) {
    /*
    Archivo a;
    //Path originalPath =  FileSystems.getDefault().getPath("E:\\CV_REPOSIT");
    Path originalPath = FileSystems.getDefault().getPath("/home/incentivate/Desktop/origen");
    Path destinationPath = FileSystems.getDefault().getPath("/home/incentivate/Desktop/destino");
    //System.out.println(originalPath.getFileName());
    a = new Archivo();
    a.moverArchivo(originalPath, destinationPath);
    */
    final String dirOrigen = "/home/incentivate/Desktop/origen/prueba";
    final String dirDestino = "/home/incentivate/Desktop/destino/prueba";

    File f = new File(dirOrigen);
    File f2 = new File(dirDestino);

    try {
        Archivo.copyFiles(f, f2);
    } catch (IOException ex) {
        Logger.getLogger(ILMCopy.class.getName()).log(Level.SEVERE, null, ex);
    }  
}

}

This is my File class:

package ilm.copy;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Archivo {

final static Logger LOGGER = Logger.getAnonymousLogger();
 /*
 public void moverArchivo(Path origin, Path destiny) {
        try {
            Files.move(origin, destiny, StandardCopyOption.REPLACE_EXISTING);
        } catch (FileNotFoundException ex) {
            LOGGER.log(Level.SEVERE, ex.getMessage());
        } catch (IOException ex) {
            LOGGER.log(Level.SEVERE, ex.getMessage()); 
        }
    }
 */
public static void copyFiles(File source, File dest)
    throws IOException {
FileChannel inputChannel = null;
FileChannel outputChannel = null;
try {
    inputChannel = new FileInputStream(source).getChannel();
    outputChannel = new FileOutputStream(dest).getChannel();
    outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
}catch(Exception ex){
        ex.printStackTrace();
    }
    finally {
    inputChannel.close();
    outputChannel.close();
}
}

}
java
Martin Hope
Nacho Zve De La Torre
Asked: 2020-07-17 12:35:49 +0800 CST
  • 1

I have the following code that throws me an error at runtime and I don't know where the problem is:

THE ERROR:

Exception reading configuration file java.lang.ClassCastException: org.json.simple.JSONObject cannot be cast to org.json.simple.JSONArray

My code:

 public static void readJson(){


    try {

        JSONParser parser = new JSONParser();
        JSONArray jsonArray = (JSONArray) parser.parse(new FileReader("/home/incentivate/Desktop/config.cfg"));

        for (Object object : jsonArray)
        {
          JSONObject config = (JSONObject) object;

          String verb = (String) config.get("verb");
          System.out.println(verb);

          String host = (String) config.get("host");
          System.out.println(host);

          String port = (String) config.get("port");
          System.out.println(port);

          String method = (String) config.get("method");
          System.out.println(method);

        }

    } catch (Exception e) {
        System.out.println("Excepcion leyendo fichero de configuracion " + e);
    }

}

This is what my config.cfg looks like in case you need it:

{"verb"  :"POST",
 "host"  :"192.169.3.243",
 "port"  :"8080",
 "method":"API/DOCUMENTS/"}

What I need is to get each value of the JSON inside a JAVA variable so that I can continue using them.

I am using Java 8 and the Simple JSON library.

java
Martin Hope
Nacho Zve De La Torre
Asked: 2020-06-18 14:10:18 +0800 CST
  • 1

Form1 Form2I have the following code that is executed every time the ADD ITEM button is clicked and that creates a new row with the data entered in the textBox above in the DataGridView below.

    // AGREGA UN PRODUCTO
    private void btnAgregarItem_Click(object sender, EventArgs e)
    {
            Pagos.Rows.Add(txtID.Text, txtNombre.Text, txtPrecio.Text, txtCantidad.Text, etiquetaSubTotalNum.Text);

            string mesa = this.numMesa;
            int id_producto = Convert.ToInt32(txtID.Text.ToString());
            string nombre = txtNombre.Text.ToString();
            double precio = Convert.ToDouble(txtPrecio.Text.ToString());
            double cantidad = Convert.ToDouble(txtCantidad.Text.ToString());
            double subtotal = Convert.ToDouble(etiquetaSubTotalNum.Text.ToString());

            String consulta = "INSERT INTO Productos (mesa, id_producto, nombre, precio, cantidad, subtotal) VALUES (@mesa, @id_producto, @nombre, @precio, @cantidad, @subtotal)";
            SQLiteCommand cmd = new SQLiteCommand(consulta, conexion);

            cmd.Parameters.Clear();
            cmd.Parameters.Add(new SQLiteParameter("@mesa", mesa));
            cmd.Parameters.Add(new SQLiteParameter("@id_producto", id_producto));
            cmd.Parameters.Add(new SQLiteParameter("@nombre", nombre));
            cmd.Parameters.Add(new SQLiteParameter("@precio", precio));
            cmd.Parameters.Add(new SQLiteParameter("@cantidad", cantidad));
            cmd.Parameters.Add(new SQLiteParameter("@subtotal", subtotal));
            cmd.ExecuteNonQuery();

    }

I need the load() function to be executed when a table is opened, that is, every time the button of a table is clicked, it brings me the data of that table from my Products table in my database and inserts that data from the table inside the columns of my dataGridView:

  public void cargar()
    {
        string mesa = this.numMesa;
        string consulta = "select * from Productos where mesa = @mesa";
        SQLiteCommand cmd = new SQLiteCommand(consulta, conexion);
        cmd.Parameters.Clear();
        cmd.Parameters.Add(new SQLiteParameter("@mesa", mesa));
        using (SQLiteDataReader read = cmd.ExecuteReader())
        {
            while (read.Read())
            {
                Pagos.Rows.Add(new object[] {
    read.GetValue(0),
    //read.GetValue(read.GetOrdinal("mesa")),
    read.GetValue(read.GetOrdinal("id_producto")),
    read.GetValue(read.GetOrdinal("nombre")),
    read.GetValue(read.GetOrdinal("precio")),
    read.GetValue(read.GetOrdinal("cantidad")),
    read.GetValue(read.GetOrdinal("subtotal"))
    });
            }
        }

    }

My products table is made up of the following columns:

mesa, id_producto, nombre, precio, cantidad, subtotal

My dataGridViewhas the columns:

id_productos, nombre, precio, cantidad, subtotal.
c#
Martin Hope
Nacho Zve De La Torre
Asked: 2020-06-05 18:02:54 +0800 CST
  • 4

I'm trying to make a table system for a restaurant, but things are getting difficult. What I want to do is a button that when clicked creates new buttons (at runtime/dynamic - or new restaurant tables) and then be able to move those same buttons (tables) and position them inside the Main Form.

My main form has these 4 variables:

 int posMouseFormX, posMouseFormY, posMouseBotonX, posMouseBotonY, 
 posActBotonX, posActBotonY

I have this code that creates the button for me when I start the form:

     private void crearNuevaMesa()
    {
        for (int i = 0; i < 10; i++)
        {
            Button btn = new Button();
            btn.Name = "btn" + i;
            btn.Height = 40;
            btn.Width = 300;
            btn.BackColor = Color.Red;

            btn.Location = new Point(200, 200);
            btn.Text = "SOY UNA NUEVA MESA";
            btn.Font = new Font("Georgia", 16);

            btn.MouseMove += new MouseEventHandler(btn_MouseMove);

            Controls.Add(btn);
        }
    }

And then I invoke this other method to set the coordinates:

      private void btn_MouseMove(object sender, EventArgs e)
    {
        posMouseFormX = posActBotonX + e.Location.X;
        posMouseFormY = posActBotonY + e.Location.Y;
        if (botonPresionado == true)
        {
            moverBoton();
        }
    }

But it breaks me in the e.Location.X of the btn_MouseMove method and I don't know why !!!! Someone help me ??

c#
Martin Hope
Nacho Zve De La Torre
Asked: 2020-05-28 17:05:29 +0800 CST
  • 1

The thing is like this: I have two forms, Form1and Form2.

Form1It is the main one and it has 20 buttons, each one representing a different table in my restaurant. Clicking on any of them opens a page Form2in which orders can be registered, etc... Each form2also contains a Title button Abrir Mesawhich I need, when clicked, to change the background color of the button MESA 1in the Form1. If the button Abrir mesais MESA 2clicked, then I need it to be THIS and not the MESA 1one to change color, and so on.

I've created this that works for me only for the first button, that is, MESA1but I can't find something that works for everyone. I leave some code to see if someone can help me. From already thank you very much!

   // FORM 1

  public void btnMesa1_Click(object sender, EventArgs e)
    {
        Form2 f2 = new Form2(this);
        f2.Text = "Mesa 1";
        f2.Show();
    }

    private void btnMesa2_MouseClick(object sender, MouseEventArgs e)
    {
        Form2 f2 = new Form2(this);
        f2.Text = "Mesa 2";
        f2.Show();
    }

    public void cambiarFondo()
    {
        btnMesa1.BackColor = Color.Green;
    }


       // FORM 2



    public partial class Form2 : Form
{
    double precio = 0;
    double cantidad = 0;
    double subtotal = 0;
    double total = 0;
    Form1 f1 = new Form1();

    public Form2()
    {

    }

    public Form2(Form1 parametro)
    {
        InitializeComponent();
        f1 = parametro;
    }

    private void Form2_Load(object sender, EventArgs e)
    {
        DataGridViewButtonColumn colBotones = new DataGridViewButtonColumn();
        colBotones.Name = "colBotones";
        colBotones.HeaderText = "BORRAR";
        this.Pagos.Columns.Add(colBotones);
    }

    private void txtCantidad_TextChanged(object sender, EventArgs e)
    {
        precio = Convert.ToDouble(txtPrecio.Text);
        cantidad = Convert.ToDouble(txtCantidad.Text);
        subtotal = precio * cantidad;
        etiquetaSubTotalNum.Text = subtotal.ToString();
    }

    // AGREGA UN PRODUCTO
    private void btnAgregarItem_Click(object sender, EventArgs e)
    {
        Pagos.Rows.Add(txtID.Text, txtNombre.Text, txtPrecio.Text, txtCantidad.Text, etiquetaSubTotalNum.Text);

    }

    // CALCULA EL VALOR TOTAL DE LA MESA E IMPRIME EL TICKET
    private void btnTicket_Click(object sender, EventArgs e)
    {
        for (int i = 0; i < Pagos.Rows.Count; i++)
        {
            total += double.Parse(Pagos.Rows[i].Cells["celdaSubtotal"].Value.ToString());
        }

        etiquetaTotalNum.Text = total.ToString();
        total = 0;
    }

    // CIERRA LA MESA
    private void btnCerrarMesa_Click(object sender, EventArgs e)
    {
        this.Close();
    }

    // DIBUJA "BORRAR" SOBRE LOS BOTONES DE ELIMINAR
    private void Pagos_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
    {
        if (e.ColumnIndex >= 0 && this.Pagos.Columns[e.ColumnIndex].Name == "colBotones" && e.RowIndex >= 0)
        {
            e.Paint(e.CellBounds, DataGridViewPaintParts.All);

            DataGridViewButtonCell celBoton = this.Pagos.Rows[e.RowIndex].Cells["colBotones"] as DataGridViewButtonCell;

            e.Graphics.DrawString("BORRAR", new Font("Verdana", 8), new SolidBrush(Color.Red),
            e.CellBounds.Left + 3, e.CellBounds.Top + 3);

            e.Handled = true;
        }
    }

    // ELIMINA LA FILA DE ESE PRODUCTO AL HACER CLICK EN EL BOTON "BORRAR"
    private void Pagos_CellClick(object sender, DataGridViewCellEventArgs e)
    {
        if (this.Pagos.Columns[e.ColumnIndex].Name == "colBotones")
        {
            Pagos.Rows.RemoveAt(Pagos.CurrentRow.Index);
        }
    }

    // CAMBIA EL BOTON DE LA MESA A COLOR VERDE/ABIERTA
    private void btnAbrirMesa_Click(object sender, EventArgs e)
    {
        this.btnAbrirMesa.BackColor = Color.Green;
        f1.cambiarFondo();
    }
c#