initialize variable repeatedly using for loop in javascript

Question

my question is can i possibly initialize variables repeatedly (with changing only numbers after them) this is my code

for(i = truStorage.getItem('elementCount'); i>0; i--) {
var obj = truStorage.getItem("element_" + i);
var [obj_+i] =  element(erd.Entity , obj.posx, obj.posy, obj.text );}

};

basically i just want to initialize a variable like

something_i = "";

and the result will be like this

var element_1 = element(erd.Entity, 100, 200, "Employee");
var element_2 = element(erd.Entity, 100, 400, "Salesman");
var element_3 = element(erd.WeakEntity, 530, 200, "Wage");
var element_4 = element(erd.IdentifyingRelationship, 350, 190, "gets paid");

im not trying to use variables as a storage but rather to instantiate an element for a function.

What are you trying to accomplish? This sounds like a bad idea, maybe we can help you with ideas :) — Hanlet Escaño
– Hanlet Escaño, Commented Jan 19, 2014 at 9:31
Everytime you come across a situation like that, just push all your objects into an array and iterate over it. — ReX357
– ReX357, Commented Jan 19, 2014 at 9:31

MikeHelland · Accepted Answer · 2014-01-19 09:31:47Z

2

This is a job for an array.

var something = [];
var somethings = 5;

for(var i = 0; i < somethings; i++) {
    something[i] = "";
}

You should now be able to access the five values like this:

console.log(something[0])
console.log(something[1])
console.log(something[2])
console.log(something[3])
console.log(something[4])

Notice you use 0 to access the first element. That's just how it is because JavaScript arrays are zero-based.

answered Jan 19, 2014 at 9:31

MikeHelland

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Comments

Zaheer Ahmed · Accepted Answer · 2014-01-19 09:32:21Z

0

This is best scenario to use array:

var counter=0,something = new Array();
for(i = truStorage.getItem('elementCount'); i>0; i--) {
   something[counter] =  truStorage.getItem("element_" + i).text;
   counter++;
  }
};

answered Jan 19, 2014 at 9:32

Zaheer Ahmed

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Comments

Jack · Accepted Answer · 2014-01-19 09:42:58Z

0

Try:

for(var i=1; i<=4; i++) {
    this["something_" + i] = i;
}

console.log(something_1); //outputs 1;
console.log(something_2); //outputs 2;
console.log(something_3); //outputs 3;
console.log(something_4); //outputs 4;

Note: using an array will be faster!

edited Jan 19, 2014 at 9:42

answered Jan 19, 2014 at 9:33

Jack

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1 Comment

Dave Over a year ago

1: use window, not this (which can change with scope and is not defined at root level in strict mode) and 2: the other questions are providing a much better answer to the problem (if not the question); you should at least note that.

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