How to combine var? + Example script

Question

By pressing the first button I should have some random numbers,

817
754
692

By pressing the second button '123:123', the numbers should appear like this:

817:817
754:754

But what I get is:

How can i combine them please?

function ra(length) {
  var consonants = "123456789",
    vowels = '123456789',
    rand = function(limit) {
      return Math.floor(Math.random() * limit);
    },
    i, word = '',
    length = parseInt(length, 10),
    consonants = consonants.split(''),
    vowels = vowels.split('');
  for (i = 0; i < length / 2; i++) {
    var randConsonant = consonants[rand(consonants.length)],
      randVowel = vowels[rand(vowels.length)];
    word += (i === 0) ? randConsonant.toLowerCase() : randConsonant;
    word += i * 2 < length - 1 ? randVowel : '';
  }
  return word;
}
$("#click").click(function() {
  $("#test").text('');
  for (var p = 0; p < 5; p++) {
    var pass1 = ra;
    $("#test").append(pass1(3) + '\n');
  }
});

$("#combine").click(function() {
  var userpass = document.getElementById('test').value;
  $("#test").append("" + userpass + ":" + userpass + "");
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="click">Click</button>
<textarea id="test" rows="5"></textarea>
<button id="combine">123:123</button>

http://jsfiddle.net/t0deq5zu/1/

A nice tip is in jsfiddle, tidy button will format your code — asdf_enel_hak
– asdf_enel_hak, Commented Jul 26, 2018 at 11:42

Pete · Accepted Answer · 2018-07-26 12:00:07Z

You would need to split and loop through each line - currently you get all values as one variable. See edit below in the combine click event (comments in code)

function ra(length) {
  var consonants = "123456789",
    vowels = '123456789',
    rand = function(limit) {
      return Math.floor(Math.random() * limit);
    },
    i, word = '',
    length = parseInt(length, 10),
    consonants = consonants.split(''),
    vowels = vowels.split('');
  for (i = 0; i < length / 2; i++) {
    var randConsonant = consonants[rand(consonants.length)],
      randVowel = vowels[rand(vowels.length)];
    word += (i === 0) ? randConsonant.toLowerCase() : randConsonant;
    word += i * 2 < length - 1 ? randVowel : '';
  }
  return word;
}
$("#click").click(function() {
  $("#test").text('');
  for (var p = 0; p < 5; p++) {
    var pass1 = ra;
    $("#test").append(pass1(3) + '\n');
  }
});

$("#combine").click(function() {
  var userpass = document.getElementById('test').value;
  var lines = userpass.split('\n');  // split the values into each line
  
  if (lines.length) {
    $("#test").empty();             // empty the textarea
    for (var i = 0; i < lines.length; i++) {
        if (lines[i].trim() != '') {   // don't append empty line
          if (lines[0].indexOf(':') > -1) {  // button already pressed so re-append same
            $("#test").append(lines[i] + "\n")
          } else {
            $("#test").append(lines[i] + ":" + lines[i] + "\n");   // apend the new values
          }
        }
    }
  }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="click">Click</button>
<textarea id="test" rows="5"></textarea>
<button id="combine">123:123</button>

Programmer · Accepted Answer · 2018-07-26 11:52:12Z

0

You're working on the $("#test") which has all the numbers together as its content, so all the numbers together are decoupled. you need to decouple every row separately (using split('\n')).

working JSFiddle

answered Jul 26, 2018 at 11:52

Programmer

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1 Comment

sofyumigni Over a year ago

Thank you very much Programmer!

Ale · Accepted Answer · 2018-07-26 12:39:38Z

I know that you have your answer already but I wanted to elaborate a bit with some comments on your code which I hope will help you write a bit cleaner and better code (+ some new stuff from ECMAScript6). There two major things I would recommend - always indent your code and do add some comments in it.

So here is the code with some comments:

// always use better names of your functions (names that would be like a hint what is the purpose of that function)
function ra (length) {
    // all the variables that won't change during your function should be declared as constansts
  const consonants = "123456789".split('');
  const vowels = '123456789'.split('');
  const consonantLength = consonants.length;
  const vowelsLength = vowels.length;

  let rand = function(limit){
    return Math.floor(Math.random()*limit);
  }
  // no need to declar i here when you can do so in the for loop
  //-- var i = '';

  // not sure why would you use this radix (the second argument of parseInt)
  length = parseInt(length,10);

  // there is no need to perform the split() on a separate row as this can be done with the initial declaration of your 
  //-- consonants = consonants.split('');
  //-- vowels = vowels.split('');

    let word = '';
  let loopLength =  length/2; // check this for more explanations https://stackoverflow.com/questions/8452317/do-loops-check-the-array-length-every-time-when-comparing-i-against-array-length
  for (let i = 0; i < loopLength; i++) {

    // in your code you where using consonants.length which will be executed each time so instead of this I will use the constant consonantLength that I have declared above
        let randConsonant = consonants[rand(consonantLength)];
    let randVowel = vowels[rand(vowelsLength)];
    // not sure what are you doing here, so can't comment much. It is a very good practice to leave some comments on places where the main logic of your code is happening
    word += (i === 0) ? randConsonant.toLowerCase() : randConsonant;
    word += i*2 < length-1 ? randVowel : '';
  }

  return word;
 }

 // the jQuery event 'click' is a bit old and will get some day deprecated, instead I would suggest to use 'on' 
 $("#click").on('click',function(){
  $("#test").text('');
  //-- var pass1 = ra; // there is no need of this row. you can just call the function ra down below in the loop
  for(var p = 0; p < 5; p++){
    $("#test").append(ra(3)+'\n');
    }
});

$("#combine").on('click',function(){
  // let's get the value from the textarea, and as it will be a string we need to split it by rows
  // btw: I believe there is a better regex that will exclude the last \n 
  let userpass = document.getElementById('test').value.split(/\n/g);
  // and we remove the last element from the array that will be an empty one
  userpass.pop();
  // we loop through all the elements from the array 
    for (let row of userpass) {
    // we do check if there is value in row as the last element will be an empty string
    $("#test").append(row+":"+row+'\n');
  }
});

And a JSFiddle

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