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Emy's questions

Martin Hope
Emy
Asked: 2022-10-21 17:42:17 +0800 CST
  • 2

I'm trying to check if a vowel exists in a string, if found I use break; to break the loop and return a message, but it doesn't work.

        String palabra="manzana";
        String[] arrayPalabra=palabra.split("");
        String[] vocales=new String[]{"a","e","i","o","u"};
        var listVocals=Arrays.asList(vocales);
        for (int i=0;i<arrayPalabra.length;i++) {
            boolean existe = listVocals.contains(arrayPalabra[i]);
            if(existe==true){
                System.out.println("Existe vocal");
                break;
            }else{
                System.out.println("NO Existe vocal"); 
                break;
            }
        }
java
Martin Hope
Emy
Asked: 2022-08-04 13:40:55 +0800 CST
  • 0

I have a list with several links that contains only the attribute href:

<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Home</title>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width" />
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script src="script.js"></script>
  </head>
  <body>
    <ul>
      <li><a href="https:///www.google.com"></a></li>
      <li><a href="https:///www.youtube.com"></a></li>
      <li><a href="https:///www.twitter.com"></a></li>
    </ul>
  </body>
</html>

I must obtain the href attribute of each link to put it as the link text, but when I print it in the console it appears as undefined. In the file script.jsI have:

$(document).ready(function () {
  $('a').each((index, value) => {
    var enlace = $(this).attr('href');
    console.log(enlace);
    $(this).text(enlace);
  });
});

I expected this result:

result

But it still shows me empty:

empty

html
Martin Hope
Emy
Asked: 2022-05-14 13:01:26 +0800 CST
  • 0

I have a problem with swagger, it seems that it does not include the xml file of the api when it is published. I have a WebApi2 and when publishing the project in azure the api opens correctly but when trying to enter swagger it shows me the following error:

500 : {"Message":"An error has occurred."} https://api.azurewebsites.net/swagger/docs/v1

The xml file is located in the bin folder and for this in the properties of the api I added the following configuration inside the compilation:

buddy

And I have the swagger configuration file inside the App_Start folder, there I have the method to obtain the path as follows:

private static string GetXmlCommentsPath()
{
   return Path.Combine(System.Web.HttpRuntime.AppDomainAppPath,"bin","api.xml");
}

Only when I post the api, swagger doesn't work. But when compiling on localhost it works.

c#
Martin Hope
Emy
Asked: 2022-04-24 12:49:20 +0800 CST
  • 0

I have an array formed as follows:

descriptionAndItem = [
    {
      description: 'Transaction A',
      items: [
        { status: 1, description: 'Item A', code: 4 },
        { status: 1, description: 'Item B', code: 3 },
      ],
    },
    {
      description: 'Transaction B',
      items: [{ status: 0, description: 'Item C', code: 8 }],
    },
    {
      description: 'Transaction C',
      items: [
        { status: 1, description: 'Item D', code: 4 },
        { status: 0, description: 'Item E', code: 8 },
      ],
    },
  ];

From that information I must filter only those that have the status of the item equal to one, for this I use the function filterand findin the following way:

let filterData = this.descriptionAndItem.filter((x: any) =>
    x.items.find((y: any) => y.status === 1)
);

But when there is more than one item and only one of them has the status equal to one, the filter also shows the item that has the status equal to zero. How could I do the filtering so that it does not show that item or eliminates it.

item

Demo: Stackblitz

javascript
Martin Hope
Emy
Asked: 2022-09-09 07:54:34 +0800 CST
  • 2

I have a table with several and I want to add a requiredmat-select validation in each one. But since a table with several rows is generated, this control would be the same for each row. So it only validates one for me , how could I add that validation independently as if it were a different control for each row. I don't know if it's possible.mat-select

table

The .HTML is as follows

<form [formGroup]="form">
  <table class="table">
    <tr>
      <th>Opciones</th>
      <th>Descripciones</th>
    </tr>
    <tr *ngFor="let row of dataDescripciones let i = index">
      <td>
        <mat-form-field appearance="outline">
          <mat-select formControlName="ctrlOpcion" placeholder="Select">
            <mat-option *ngFor="let op of dataOpciones" [value]="op.id">
              {{op.opcion}}
            </mat-option>
          </mat-select>
          <mat-error *ngIf="onCtrlValidate('ctrlOpcion','required')">Required</mat-error>
        </mat-form-field>
      </td>
      <td>{{row.descripcion}}</td>
    </tr>
  </table><br>
</form>

And the .TS

dataOpciones = [
  { id: 12, opcion: 'Opcion 1' },
  { id: 13, opcion: 'Opcion 2' },
  { id: 14, opcion: 'Opcion 3' }
  //etc
];
dataDescripciones = [
  { id: 1, descripcion: 'Dato 1' },
  { id: 2, descripcion: 'Dato 2' },
  { id: 3, descripcion: 'Dato 3' }
  //etc
];
form: FormGroup;
constructor(public fb: FormBuilder) {}
ngOnInit() {
  this.form = this.fb.group({
    ctrlOpcion: ['', Validators.required]
  });
}
onCtrlValidate(name: any, error: any): FormControlDirective {
  return <FormControlDirective>this.form.controls[name].errors?.[error]
}

I uploaded a demo on the stackblitz demo page

angular
Martin Hope
Emy
Asked: 2022-07-18 18:00:48 +0800 CST
  • 0

Good morning everyone. I'll tell you about the situation, I have a button that when clicked shows the message in a label and I have a method that should show another message after 3 seconds, but it doesn't work for me. I tried it in console and the method is executed. I don't understand the reason.

<form runat="server">
<asp:Label runat="server" ID="lblMessage"></asp:Label>
<asp:Button runat="server" OnClick="btn_Click" ID="btn" Text="Probar" />
</form>

protected void btn_Click(object sender, EventArgs e){
   lblMessage.Text = "hola";
   Task.Delay(new TimeSpan(0, 0, 3)).ContinueWith(o => { lblMessage.Text = "3 segundos"; });
}
c#
Martin Hope
Emy
Asked: 2022-04-27 07:35:42 +0800 CST
  • 0

A greeting and good day to all, I hope you can guide me with my problem. I tell you I have a simple QR reader where I load the QR image and show the result on the screen. It works normally when running the project using the ionic serve command, but when I send it to production with the ionic build --prod command an error is generated that refers to the input:

<input #fileinput type="file" accept="image/*;capture=camera" hidden (change)="handleFile($event.target.files)">

The error generated is the following: error TS2339: Property 'files' does not exist on type 'EventTarget'. I also attach a capture of the error in the cmd:

enter image description here

So I have the code of tab1.page.html

<ion-header [translucent]="true">
  <ion-toolbar>
    <ion-title>
      DEMO LECTOR FILE QR
    </ion-title>
  </ion-toolbar>
</ion-header>

<ion-content [fullscreen]="true">
  <ion-content>
    <input #fileinput type="file" accept="image/*;capture=camera" hidden (change)="handleFile($event.target.files)">
    <ion-button expand="full" (click)="captureImage()">
      <ion-icon slot="start" name="camera"></ion-icon>
      Capturar Imagen
    </ion-button>
    <canvas #canvas hidden></canvas>
    <ion-card *ngIf="scanResult">
      <ion-card-header>
        <ion-card-title>QR Code</ion-card-title>
      </ion-card-header>
      <ion-card-content>
        {{ scanResult }}
      </ion-card-content>
    </ion-card>
  </ion-content>
</ion-content>

And so I have the code of tab1.page.ts

import { Component, ViewChild, ElementRef } from '@angular/core';
import jsQR from 'jsqr';

@Component({
  selector: 'app-tab1',
  templateUrl: 'tab1.page.html',
  styleUrls: ['tab1.page.scss']
})
export class Tab1Page {

  @ViewChild('video', { static: false }) video: ElementRef;
  @ViewChild('canvas', { static: false }) canvas: ElementRef;
  @ViewChild('fileinput', { static: false }) fileinput: ElementRef;

  canvasElement: any;
  canvasContext: any;
  scanResult = null;

  constructor() {}

  ngAfterViewInit() {
    this.canvasElement = this.canvas.nativeElement;
    this.canvasContext = this.canvasElement.getContext('2d');
  }

  captureImage() {
    this.fileinput.nativeElement.click();
  }

  handleFile(files: FileList) {
    const file = files.item(0);
    var img = new Image();
    img.onload = () => {
      this.canvasContext.drawImage(img, 0, 0, this.canvasElement.width, this.canvasElement.height);
      const imageData = this.canvasContext.getImageData(
        0,
        0,
        this.canvasElement.width,
        this.canvasElement.height
      );
      const code = jsQR(imageData.data, imageData.width, imageData.height, {
        inversionAttempts: 'dontInvert'
      });

      if (code) {
        this.scanResult = code.data;
      }
    };
    img.src = URL.createObjectURL(file);
  }
}

I have version of angular 11.2.11 and ionic 5.6.5

angular