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Storing strings in array as user selects checkbox


Storing strings in array as user selects checkbox

By : Qingnan Zhao
Date : November 20 2020, 11:01 PM
Hope that helps Please be more specific what "this is not working" means - it's hard for us to detect that without being able to run it.
I can see that your use of $scope.plansSelected as an empty array is wrong. I would dispense with that and do it like this:
code :
<md-list-item ng-repeat="plan in plans track by $index">
    {{plan.name}} <md-checkbox ng-model="plans[$index].selected"> </md-checkbox>
</md-list-item>


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How to show Javascript confirm box when checkbox is unchecked and then if user selects cancel, leave the checkbox checke

How to show Javascript confirm box when checkbox is unchecked and then if user selects cancel, leave the checkbox checke


By : franklini
Date : March 29 2020, 07:55 AM
will help you I have a small html form with three checkboxes, one in each row. I want to have a javascript confirm box show when the user unchecks the box, and then if the user selects cancel, the checkbox remains checked. I've searched this site and a few others but almost everything was to do with the checkbox being checked, like if they had to agree to some terms or something. I am very new to Javascript however I tried to make a function based on what I though it should look like, but it doesn't work. , Try This Way
code :
<form action="" method="post">
  <table id="table">
    <tr>
      <td>Checkbox One</td>
      <td align="center">
        <input type="checkbox" name ="check1" id="check1" checked='checked' onchange="cTrig('check1')"></input>
      </td>
    </tr>
    <tr>
      <td>Checkbox Two</td>
      <td align="center">
        <input type="checkbox" name="check2" id="check2" checked='checked' onchange="cTrig('check2')"></input>
      </td>
    </tr>
    <tr>
      <td>Checkbox Three</td>
      <td align="center">
        <input type="checkbox" id="check3" name="check3" checked='checked' onchange="cTrig('check3')"></input>
      </td>
    </tr>
    <tr align="center">
      <td colspan="2">
        <input type="submit" name="submit" value="submit"></input>
      </td>
    </tr>
  </table>
</form>
function cTrig(clickedid) { 
      if (document.getElementById(clickedid).checked == true) {
        return false;
      } else {
       var box= confirm("Are you sure you want to do this?");
        if (box==true)
            return true;
        else
           document.getElementById(clickedid).checked = true;

      }
    }
function cTrig(clickedid) { 
      if (document.getElementsByName(clickedid)[0].checked == true) {
        return false;
      } else {
       var box= confirm("Are you sure you want to do this?");
        if (box==true)
            return true;
        else
           document.getElementsByName(clickedid)[0].checked = true;

      }
    }
On click button a validation on checkbox if user selects more than one checkbox, it should allow if user selects only on

On click button a validation on checkbox if user selects more than one checkbox, it should allow if user selects only on


By : Ahyan
Date : March 29 2020, 07:55 AM
I hope this helps you . I think you can do better using the approach by sravis using jQuery.
Here are the issues in your original code: You call the function CheckedOne in the HTML but have a different name in the JS (Checked).
Implementing QDialogButtonBox by storing the index values that the user selects

Implementing QDialogButtonBox by storing the index values that the user selects


By : Nam Trung
Date : March 29 2020, 07:55 AM
help you fix your problem You can create your own dialog by subclassing QDialog.
Here is an example:
code :
#ifndef MYDIALOG_H
#define MYDIALOG_H

#include <QDialog>

class QLineEdit;
class QComboBox;

class MyDialog : public QDialog
{
    Q_OBJECT
public:
    explicit MyDialog(QWidget *parent = 0);
    QString getName() const;
    int getIndex() const;

private:
    QComboBox *comboBox;
    QLineEdit *lineEdit;
};

#endif // MYDIALOG_H
#include "mydialog.h"
#include <QDialogButtonBox>
#include <QLayout>
#include <QComboBox>
#include <QLineEdit>


MyDialog::MyDialog(QWidget *parent) :
    QDialog(parent)
{
    QVBoxLayout *layout = new QVBoxLayout;
    this->setLayout(layout);

    comboBox = new QComboBox; // create combo box and add items to it
    QStringList items = QStringList() << "item1" << "item2" << "item3" << "item4";
    comboBox->addItems(items);
    layout->addWidget(comboBox);

    lineEdit = new QLineEdit; // create line edit
    layout->addWidget(lineEdit);

    // create button box
    QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
    connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
    layout->addWidget(buttonBox);
}

QString MyDialog::getName() const
{
    return lineEdit->text();
}

int MyDialog::getIndex() const
{
    return comboBox->currentIndex();
}
#include "mainwindow.h"
#include <QApplication>
#include "mydialog.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    MyDialog myDialog;
    if(myDialog.exec()) // shows MyDialog on the screen and waits for the user to close the dialog
    {
        int index = myDialog.getIndex();
        QString name = myDialog.getName();
        // do something with these..
        w.setPlayerData(index, name);
    }
    else
        return 0;

    w.show(); // shows MainWindow on the screen
    return a.exec();
}
void MainWindow::setPlayerData(int _index, const QString &_name)
{
    index = _index; // index is a member variable declared somewhere in your mainwindow.h
    name = _name; // name is a member variable declared somewhere in your mainwindow.h
}
Taking user input and storing it in an array of strings in C

Taking user input and storing it in an array of strings in C


By : user3691016
Date : March 29 2020, 07:55 AM
wish help you to fix your issue The process is basically the same regardless of whether you read from stdin or read from a file. You either read each line with line-oriented input (fgets or getline) or you use character-oriented input (getchar, fgetc, etc). (the scanf family falls in the middle). When reading lines, generally the best choice is line-oriented input.
When reading user input into an array, you have two choices, either declare a static array of pointers and hope you allocated enough pointers to begin with, or you dynamically allocate the array of pointers and realloc as needed to hold all input. (who knows, the user might redirect a file for reading). When you allocate anything dynamically you are responsible to track its use, preserve a pointer to the original starting address for the block of memory, and freeing the memory when it is no longer needed.
code :
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define NMAX 128

int main (int argc, char **argv) {

    char *ln = NULL;                /* NULL forces getline to allocate  */
    size_t n = 0;                   /* initial ln size, getline decides */
    ssize_t nchr = 0;               /* number of chars actually read    */
    size_t idx = 0;                 /* array index counter              */
    size_t nmax = NMAX;             /* check for reallocation           */
    char **array = NULL;            /* array to hold lines read         */
    FILE *fp = NULL;                /* file pointer to open file fn     */

    if (argc > 1) {
        if (!(fp = fopen (argv[1], "r"))) {
            fprintf (stderr, "error: file open failed for '%s'\n", argv[1]);
            return 1;
        }
    }
    else
        fp = stdin;

    /* allocate NMAX pointers to char* */
    if (!(array = calloc (NMAX, sizeof *array))) {
        fprintf (stderr, "error: memory allocation failed.");
        return 1;
    }

    if (fp == stdin)
        printf ("\nEnter information to store in array on each line, [ctrl+d] when done:\n\n");

    /* read each line from file or stdin - dynamicallly allocated   */
    while ((nchr = getline (&ln, &n, fp)) != -1)
    {
        /* strip newline or carriage rtn    */
        while (nchr > 0 && (ln[nchr-1] == '\n' || ln[nchr-1] == '\r'))
            ln[--nchr] = 0;

        array[idx] = strdup (ln);   /* allocate/copy ln to array        */

        idx++;                      /* increment value at index         */

        if (idx == nmax) {          /* if lines exceed nmax, reallocate */
            char **tmp = realloc (array, nmax * 2 * sizeof *tmp);
            if (!tmp) {
                fprintf (stderr, "error: memory exhausted.\n");
                break;
            }
            array = tmp;
            nmax *= 2;
        }
    }

    if (ln) free (ln);              /* free memory allocated by getline */
    if (fp != stdin) fclose (fp);   /* close open file descriptor       */

    size_t i = 0;

    /* print array */
    printf ("\nThe lines in the file are:\n\n");
    for (i = 0; i < idx; i++)
        printf (" line[%3zu] : %s\n", i, array[i]);

    /* free array */
    for (i = 0; i < idx; i++)
        free (array[i]);
    free (array);

    return 0;
}
$ ./bin/getline_readstdin_dyn

Enter information to store in array on each line, [ctrl+d] when done:

This is a line of input
This is another
and another
etc..

The lines in the file are:

 line[  0] : This is a line of input
 line[  1] : This is another
 line[  2] : and another
 line[  3] : etc..
$ ./bin/getline_readstdin_dyn dat/ll_replace_poem.txt

The lines in the file are:

 line[  0] : Eye have a spelling chequer,
 line[  1] : It came with my Pea Sea.
 line[  2] : It plane lee marks four my revue,
 line[  3] : Miss Steaks I can knot sea.
 line[  4] : Eye strike the quays and type a whirred,
 line[  5] : And weight four it two say,
 line[  6] : Weather eye am write oar wrong,
 line[  7] : It tells me straight aweigh.
 line[  8] : Eye ran this poem threw it,
 line[  9] : Your shore real glad two no.
 line[ 10] : Its vary polished in its weigh.
 line[ 11] : My chequer tolled me sew.
 line[ 12] : A chequer is a bless thing,
 line[ 13] : It freeze yew lodes of thyme.
 line[ 14] : It helps me right all stiles of righting,
 line[ 15] : And aides me when eye rime.
 line[ 16] : Each frays come posed up on my screen,
 line[ 17] : Eye trussed too bee a joule.
 line[ 18] : The chequer pours over every word,
 line[ 19] : Two cheque sum spelling rule.
$ ./bin/getline_readstdin_dyn < dat/ll_replace_poem.txt
How can I have a disabled checkbox which becomes active when a user selects it?

How can I have a disabled checkbox which becomes active when a user selects it?


By : LeBrock
Date : March 29 2020, 07:55 AM
With these it helps What I'm trying to accomplish , First add this code to your htlm
code :
<div class="form-group center">
  <div class="checkbox">
    <label><input type="checkbox" value="" id="customchecked">Custom Currency:</label>
  </div>
  <input type="number" class="amount form-control" placeholder="Enter Custom Currency" id="inputcustom" disabled>
</div>
$("#customchecked").change(function(){
  if($(this).is(":checked")){
    $("#inputcustom").prop("disabled", false);
  } else {
    $("#inputcustom").prop("disabled", true);
  }
});
var count = 0;
$("#inputcustom").change(function(){
  $(".currency-list").append("<option id='cc"+count+"' value='"+$(this).val()+"'>CC"+count+"</option>");
  count += 1;
});
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