Question

112

dynamic array names javascript

rated 0 times [ 116] [ 4] / answers: 1 / hits: 19183 / 10 Years ago, fri, march 21, 2014, 12:00:00

I have a few arrays with like names.

ArrayTop[]  

ArrayLeft[]   

ArrayRight[]  

ArrayWidth[]

I am trying to set the name dynamically in a function and then set value.

I have tried many ways of dynamically picking the right array but have not come up with a solution.

function setarray(a,b,c){

    eval(Array+a+[b])=c

}



setarray('Top',5,100)

In this example i am trying to set.

ArrayTop[5]=100

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kamronr

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2 Years ago

answered 10 Years ago emiliano · Accepted Answer

If you are doing this in the browser, one possible solution would be to do:

function setArray(a, b, c){

    window['Array' + a][b] = c;

}



setArray('Top', 5, 100);

I would recommend that all your array's be contained in some object and not pollute the global namespace. So it would be more like:

var arrays = {

    ArrayTop: [],

    ArrayNorth: []

};



function setArray(a, b, c){

    arrays['Array' + a][b] = c;

}



setArray('Top', 5, 100);

I would not recommend using eval. Eval is not meant for this kind of dynamic evaluation and it is a huge performance hit.