CODEWITHSUNDEEP
javascriptvariables
Arun Mohan
Arun Mohan

Reputation: 978

how to declare dynamic variables in javascript?

I have a field named tags. The input to this field can be any number of strings,depending on the user.And I need to store those strings in separate variable names. I tried something like this:

var tagsInputArray = ["a", "b"......n elements];
var tagsLength = tagsInputArray.length;
var count = 0;
for (count; count < tagsLength; count++) {
    var tags[count] = tagsInputArray[count];
}

This is not working. How can I do it in jQuery?

Upvotes: 2

Views: 52

Answers (2)

Adil
Adil

Reputation: 148120

length is not defined anywhere you probably need to use tagsLength in loop

for(count;count<tagsLength ;count++){

You also have error for var tags[count] = tagsInputArray[count]; as this is wrong syntax for declaring array. Removing the var key word would remove the error and your code would work.

Live Demo

var tagsInputArray = ["a", "b"];
var tagsLength = tagsInputArray.length;
var count = 0;
var tags = [];
for (count; count < tagsLength; count++)
     tags[count] = tagsInputArray[count];

for (count = 0; count < tags.length; count++)
  alert(tags[count]);

I would also recommend to use .push to add array element to other array, see this demo.

tags.push(tagsInputArray[count]);

Upvotes: 2

Tushar
Tushar

Reputation: 87203

Try this:

var tagsInputArray = ["a", "b"......n elements];

var tags = [];
for (var count = 0; count < tagsInputArray.length; count++) {
    tags[count] = tagsInputArray[count];
}

console.log(tags);

The problem with your code is that

var tags[count] = tagsInputArray[count];

inside for loop, tags is undefined and you are adding elements inside it. I've solved it by defining tags as array before for loop and then inserted elements inside it.

Upvotes: 0

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