UselesssCat's questions

I want a software that I'm starting to be open ? and I've seen that the GPL could work for me. I know that the GPL licenses force the programmer to distribute the source code and also that works on that code must have equal or less restrictive licenses, also that this is free and derivative works too.

Currently I understand that there is version 3 of the license, but there are issues that I still do not understand about this license, such as its relationship with software patents (and the whole problem of Europe vs. USA) and what is the difference with GPLv2 .

So I have this doubt. If GPLv3 is based on GPLv2 and is compatible, what is the difference? If you can explain the full license it would be excellent ?

I've been reading, I've known for some time that Git flows exist . I understand this flow more or less well, but now I have found out that Github flow is not the same as the previous flow ?. I know that Git flows proposes master (production), develop, features/*, hotfix/* and release branches. I have entered the Github flows guide but I have not fully understood how it works.

I was wondering what is the difference between the two or, in effect, what is github flows? I have seen that there are many articles in English, but nothing in Spanish.

I know that programs compiled for native Windows have a format called Portable Executable (PE) and that allows the operating system to load the program into memory.

But I am intrigued by the process by which it is loaded into memory and then executed, that is, it happens from when I click inside the explorer process until the windows of the application itself are created by calling winmain (this is done within the code of the program as in the documentation ):

LONG APIENTRY MainWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) 

What happens between these two events?

NSD is a service used to discover other applications running the same service on the local network. I'm trying to get the NSD example that you find on the official Android site to work .

The problem is that when selecting Search the application crashes only on Android 6 (I have a tablet with android 4.4.4 and it does not give the error). When you reopen the app, the same thing happens. The error is the following:

java.lang.IllegalStateException: Could not execute method for android:onClick
    at android.view.View$DeclaredOnClickListener.onClick(View.java:4741)
    at android.view.View.performClick(View.java:5698)
    at android.widget.TextView.performClick(TextView.java:10846)
    at android.view.View$PerformClick.run(View.java:22565)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:158)
    at android.app.ActivityThread.main(ActivityThread.java:7230)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
 Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Method.invoke(Native Method)
    at android.view.View$DeclaredOnClickListener.onClick(View.java:4736)
    at android.view.View.performClick(View.java:5698) 
    at android.widget.TextView.performClick(TextView.java:10846) 
    at android.view.View$PerformClick.run(View.java:22565) 
    at android.os.Handler.handleCallback(Handler.java:739) 
    at android.os.Handler.dispatchMessage(Handler.java:95) 
    at android.os.Looper.loop(Looper.java:158) 
    at android.app.ActivityThread.main(ActivityThread.java:7230) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 
 Caused by: java.lang.IllegalArgumentException: listener already in use
    at android.net.nsd.NsdManager.discoverServices(NsdManager.java:559)
    at com.miaplicacion.configurador.NsdHelper.discoverServices(NsdHelper.java:140)
    at com.miaplicacion.configurador.NsdChatActivity.clickDiscover(NsdChatActivity.java:58)
    at java.lang.reflect.Method.invoke(Native Method) 
    at android.view.View$DeclaredOnClickListener.onClick(View.java:4736) 
    at android.view.View.performClick(View.java:5698) 
    at android.widget.TextView.performClick(TextView.java:10846) 
    at android.view.View$PerformClick.run(View.java:22565) 
    at android.os.Handler.handleCallback(Handler.java:739) 
    at android.os.Handler.dispatchMessage(Handler.java:95) 
    at android.os.Looper.loop(Looper.java:158) 
    at android.app.ActivityThread.main(ActivityThread.java:7230) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 

I think the main error is because "listener already in use". But I don't know how to fix it.

These are the additional codes:

activity_main.xml (the button code)

<Button
    android:id="@+id/discover_btn"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:onClick="clickDiscover"
    android:text="Buscar" />

NsdChatActivity (the code of the Activity that receives the click event)

public void clickDiscover(View v) {
    mNsdHelper.discoverServices();
}

NsdHelper

public void discoverServices() {
    mNsdManager.discoverServices(
            SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD, mDiscoveryListener);
}

I have to go through a range of IPs, the problem is that the format that the function returns is inverted. The format returned by the function is:

First IP

108736
00000000 00000001 10101000 11000000
       0        1      168      192

Last IP

-16668480
11111111 00000001 10101000 11000000
     255        1      168      192

What I want is that they remain:

192.168.1.0      3232235776
192.168.1.255    3232236031

This to be able to go through them in a cycle.

Edit

The for is this:

for (int i = getNetworkIp(c) + 1, bc = getBroadCastIp(c); i < bc; i++) { 
    if (isReachable(intToIp(i))) { 
        ips += "ip " + intToIp(i) + " encontrada\n";
    }
}

The problem is that when doing the cycle I have left from: 108736 to -16668480

Reviewing dependencies of a project I have found a very confusing code, but the part that caught my attention is the following:

if ($("#weather-widget")[0] && $.simpleWeather({
        location: "Austin, TX",
        woeid: "",
        unit: "f",
        success: function(weather) {
            html = '<div class="weather-status">' + weather.temp + "&deg;" + weather.units.temp + "</div>", 
            html += '<ul class="weather-info"><li>' + weather.city + ", " + weather.region + "</li>", 
            html += '<li class="currently">' + weather.currently + "</li></ul>", 
            html += '<div class="weather-icon wi-' + weather.code + '"></div>', 
            html += '<div class="dw-footer"><div class="weather-list tomorrow">', 
            html += '<span class="weather-list-icon wi-' + weather.forecast[2].code + '"></span><span>' + weather.forecast[1].high + "/" + weather.forecast[1].low + "</span><span>" + weather.forecast[1].text + "</span>", 
            html += "</div>", html += '<div class="weather-list after-tomorrow">', 
            html += '<span class="weather-list-icon wi-' + weather.forecast[2].code + '"></span><span>' + weather.forecast[2].high + "/" + weather.forecast[2].low + "</span><span>" + weather.forecast[2].text + "</span>", 
            html += "</div></div>", $("#weather-widget").html(html)
        },
        error: function(error) {
            $("#weather-widget").html("<p>" + error + "</p>")
        }
    }), $(".auto-size")[0] && autosize($(".auto-size")), $(".fg-line")[0] && ($("body").on("focus", ".fg-line .form-control", function() {
        $(this).closest(".fg-line").addClass("fg-toggled")
    }), $("body").on("blur", ".form-control", function() {
        var p = $(this).closest(".form-group, .input-group"),
            i = p.find(".form-control").val();
        p.hasClass("fg-float") ? 0 == i.length && $(this).closest(".fg-line").removeClass("fg-toggled") : $(this).closest(".fg-line").removeClass("fg-toggled")
    })), $(".fg-float")[0] && $(".fg-float .form-control").each(function() {
        var i = $(this).val();
        0 == !i.length && $(this).closest(".fg-line").addClass("fg-toggled")
    }), $("audio, video")[0] && $("video,audio").mediaelementplayer(), $(".chosen")[0] && $(".chosen").chosen({
        width: "100%",
        allow_single_deselect: !0
    }), $("#input-slider")[0]) {
    var slider = document.getElementById("input-slider");
    noUiSlider.create(slider, {
        start: [20],
        connect: "lower",
        range: {
            min: 0,
            max: 100
        }
    })
}

In addition to being very messy, the code has commas in the if condition. I've never seen that you can use commas and I don't really know what it does.

Also in the part that function(weather) {separates a concatenation by commas:

html = '<div class="weather-status">' + weather.temp + "&deg;" + weather.units.temp + "</div>", 
html += '<ul class="weather-info"><li>' + weather.city + ", " + weather.region + "</li>", 

I would like to know what produces the comma in the If and if it is part of the javascript standard

Good.

I have a class attribute that I want to initialize with another static attribute of the same class, the problem is that none of the ways I have tried assigning the value to it work. This is the code I have:

<?php

class ClaseEjemplo {

    public static $name = "santiago";

    //protected $asd = self::$name; //No funciona
    //protected $asd = static::$name; //No funciona
    //protected $asd = ClaseEjemplo::$name; //No funciona
    //protected $asd = ClaseEjemplo::$name; //No funciona
    //protected $asd = ClaseEjemplo::name; //No funciona

    protected $asd;

    // esto si funciona
    ///*
    function __construct(){
        $this->asd = self::$name;
    } //*/
}

$clase = new ClaseEjemplo;
var_dump($clase);

I know that with the constructor it can be initialized, but I wonder if it can be initialized just by assigning it.

To test the code I use this sandbox

Good.

I want to assign attributes to a class from an array that may or may not have the keys, like in this example:

class ClasePrueba extends Model {
    public function fillWithData(array $data){
        $this->ATRIBUTE1 = $data['data1'];
        $this->ATRIBUTE2 = $data['data2'];
        $this->ATRIBUTE3 = $data['data3'];
        $this->ATRIBUTE4 = $data['data4'];
    }
}

but if the key data1or any of the others don't exist, then I get an error of access to index not defined.

Notice: Undefined offset: data1

You could try a code like the following

$this->ATRIBUTE1 = (isset($data['data1'])? $data['data1']: NULL;

But I have noticed that the attribute is created and left as NULL. So I try an "assign" method that passes by reference the model attribute and the reference to the array element that may or may not be there, this is an example:

<?php

$array = array("1" => "PHP");

function assign(&$to, &$data){
    if(isset($data)){
        $to = $data;
    }
}

class a {
}

$testClass = new a;
var_dump(isset($testClass->attribute )); // bool(false)
var_dump($testClass->attribute); // Notice:  Undefined property: a::attribute

assign($testClass->attribute, $array["5"]);

var_dump($testClass->attribute); // NULL
var_dump(is_null($testClass->attribute )); // bool(true)
var_dump(isset($testClass->attribute )); // bool(false)
var_dump($testClass);

So when I call the first one var_dumpthe result is expected, the variable $testClass->attributeis not defined.

Then on the second I try to access, but the PHP interpreter notifies me that the variable $testClass->attributeis not defined, also as expected.

I call the function assingwith the class attribute as a parameter and with $array["5"]it being an undefined key, therefore the assignment inside the function is never executed assign, and therefore the object property is not created (in theory)

Then everything explodes for me when I call the third time var_dumpand it returns NULL. I don't understand why it returns NULL in the following calls instead of notifying that the attribute in the instance $testClassis not defined. It is as if the attribute were assigned NULL in the following way:

$testClass = new a;
var_dump(isset($testClass->attribute )); // bool(false)

$testClass->attribute = NULL;
var_dump($testClass->attribute); // NULL

and the last var_dump() returns:

object(a)#1 (1) {
    ["attribute"]=>
    NULL<br>
}

So it is as if my variables are set to NULL when using them as parameters in a function by reference, instead of reporting that they are not defined as if I were using unset(), since I 'technically' never set them to NULL.

This is my question: why is this happening?

Good.

I have the following code:

<?php

class ControladorDeEjemplo extends Controller
{
    public function store(StoreData $request)
    {
        $data = $request->all();

        /*
        bloque de
        instrucciones
        bastante extenso 1
         */

        if ($condicionDeError) {
            return response()->json(['success' => false, 'error' => 'Descripcion del error']);
        }

        /*
        bloque de
        instrucciones
        bastante extenso 2
         */

        return response()->json(['success' => true]);
    }
}

and I want to output the statement block to another function, since the original method I want to fix is ​​over 120 lines long. So I want to do something like this:

<?php

class ControladorDeEjemplo extends Controller
{
    public function store(StoreData $request)
    {
        $data = $request->all();

        funcion($data);

        /*
        bloque de
        instrucciones
        bastante extenso 1
         */

        return response()->json(['success' => true]);
    }

    public public function Funcion($datos)
    {
        /*
        bloque de
        instrucciones
        bastante extenso 2
         */

        $variable1;
        $variable2;

        if ($condicionDeError) {
            return response()->json(['success' => false, 'error' => 'Descripcion del error']);
        }
    }
}

But some problems I have are:

• The first block of instructions consults the database and assigns the variables necessary for the /* bloque de instrucciones bastante extenso 2 */function to work (which in this example would be the $variable1and $variable2)

• If it is not used returnwhen the function is called Funcion()inside store(), it does not return the error, but if it is used, it does not continue the routine to the end, even if the conditions are correct.

This can be fixed with a condition like this. (this is an idea)

<?php
if(get_class($result = funcion()) == "Response"){
    return $result;
}

But I have no way to pass the results of the function to the previous "store" context without making them variables of the class.

Another idea is to use exceptions and return the data as arrays. As indicated by http-exceptions . But this involves modifying the code that interprets the output in javascript.

I would like to know if there is a way to do this elegantly :P

I have this line of code, but I still can't figure out the order in which the instructions are executed.

console.log((a=[]).join(a[1]=+(a[16]='!')+"").concat((a[0]=function(p){return p + a[1][1]})(' B'),'T',a[0]('M'),(a[1][0]+a[16])));

I would like to know how it works.

This is the result in a Snippet

$('#texto').text((a=[]).join(a[1]=+(a[16]='!')+"").concat((a[0]=function(p){return p + a[1][1]})(' B'),'T',a[0]('M'),(a[1][0]+a[16])));

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p id="texto"></p>

I want to make an executable for shell or bash that will scan the entire directory for git repositories

find . ! -readable -prune -o -name ".git" -type d -prune -print

Then run (changing directory from --git-dir)

git --git-dir="/var/www/miRepo/.git" fetch --all -q

then something like this

git --git-dir="/var/www/miRepo/.git" diff --stat | tail -n1

I would like to be able to have statistics on the state of the repo something like

Ramas Remotas | Ramas Locales | Cambios (new-mod-del)            | código
master          master          M 123 - A 1 - D 1 - R 12 - C 12   (+)1223 (-)122
production    | no seguimiento

That the changes be summarized according to the states of git statusthe documentation . I would like to have a file of type sh that receives the directory as a parameter. But I do not exclude other solutions in other languages, since they serve as a base to do what I want.