CODEWITHSUNDEEP
javascriptarrays
Nithin
Nithin

Reputation: 255

How to add one array data into multiple dynamic arrays

I have one array in javascript like

var arr = ["aa","bb","cc", "dd"];

and now I want to store these values into multiple arrays dynamically like

var arr1 = ["aa"];
var arr2 = ["bb"];
var arr3 = ["cc"];
var arr4 = ["dd"];

Here the as per the size of the "arr" array I need to create dynamic arrays to store those values. For example in "arr" I have 4 values then I need to create 4 dynamic arrays to store 4 values.

I dont have any idea how to achieve this any help?

Upvotes: 0

Views: 1014

Answers (3)

Esailija
Esailija

Reputation: 140210

In global scope you can do:

arr.forEach( function( value, index ) {
    window["arr"+(index+1)] = [value];
});

Inside arbitrary scope, this is only possible under non-strict eval:

var arr = ["aa","bb","cc", "dd"];

eval( arr.map( function( value,index) {
    value = typeof value == "string" ? '"' + value + '"' : value;
    return 'var arr'+(index+1)+' = ['+value+']';
}).join(";") + ";" );

Evaluates the following code:

var arr1 = ["aa"];
var arr2 = ["bb"];
var arr3 = ["cc"];
var arr4 = ["dd"];

forEach shim
map shim

Upvotes: 1

Heitor Chang
Heitor Chang

Reputation: 6057

The only way I can think of doing exactly what you are asking for is with eval. I don't suggest using it so I put together an object, which is close and preferred.

http://jsfiddle.net/P9SSA/1/

var myOneArray = ["a","b","c","d"];

var varPrefix = "arr";
var myObj = {};
for (var i = 1; i <= myOneArray.length; i++) {
     eval(varPrefix + i + '=["' + myOneArray[i-1] + '"]');
     myObj[varPrefix + i] = [myOneArray[i-1]];
}

document.write(arr1);
document.write("<br>");
document.write(myObj.arr3);

Upvotes: 1

JB Nizet
JB Nizet

Reputation: 691645

var arrayOfArrays = [];
for (var i = 0; i < arr.length; i++) {
    arrayOfArrays[i] = [];
    arrayOfArrays[i].push(arr[i]); 
}

Upvotes: 0

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