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javascriptvariablesfor-loopdeclare
mellows
mellows

Reputation: 323

JavaScript - declare variable with for loop item

Is it possible to declare a variable differently for each iteration? Here is the general idea:

var userIds = [9110252, 55829847, 145189041]

    for(u = 0; u < userIds.length; u++){

        console.log(userIds[u]);

        var user+userIds[u] = userIds[u]; 
}

Upvotes: 0

Views: 113

Answers (3)

DevNebulae
DevNebulae

Reputation: 4906

Reading through the comments on the question and wanting to store it inside local storage. I would do this:

var userIds = [9110252, 55829847, 145189041];

for (var i = 0; i < userIds.length; i++) {
    var userId = 'user' + userIds[i];
    window.localStorage.setItem(userId, userIds[i]);
}

I would recommend however to reconsider this type of storage, because you're now storing redundant data. It's only distinguished with the word "user" in front of it.

User @Abhishek Panjabi also mentioned that this is the reason why we have arrays. He is correct in saying this.

Credits to user @adeno for his comment.

Upvotes: 1

Abhishek Panjabi
Abhishek Panjabi

Reputation: 439

We have arrays for that .Why do u need to have different name of variable when one array variable can do it for u and also it makes code easy to manage.

Upvotes: 1

Bruno Garcia
Bruno Garcia

Reputation: 6398

It's not possible. But you also don't need that:

You won't be generating dynamic variable names, but you can have a different variable in each iteration of the for loop:

var userIds = [9110252, 55829847, 145189041]
for(u = 0; u < userIds.length; u++){
   console.log(userIds[u]);
   var user = userIds[u]; 
}

On the first iteration, user will hold 9110252, on the second a new value is set to variable user: 55829847 and so forth.

But in this case, as @adeneo mentioned: You already have: userIds[u] to refer to the value.

Upvotes: 1

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