Question

162

Passing local variables from a function out to become global variables

rated 0 times [ 165] [ 3] / answers: 1 / hits: 16244 / 13 Years ago, wed, august 17, 2011, 12:00:00

I've spent the last two hours trying to figure out how to do this but nothing is working. Here is a short sample of some of my code. I want to get arrtime and several other similar variables out of the function so I can use them globally. Any ideas? Nothing too complicated please, I'm no expert (obviously).

function showTest(str) {

........



        var arrayvals = JSON.parse(xmlhttp.responseText);

        var arrtime= (arrayvals[0]);

}

var testvar=arrtime;

document.getElementById(testing).innerHTML=testvar;

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neildrews

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answered 13 Years ago rianna · Accepted Answer

The clean way to do this is using js-object notation:

function showTest(str) {

    //other code

    return {arr: arrayvals, tm: arrtime};

}



var func_result = showTest(blah-blah);

var testvar =func_result.tm;

var testvar2=func_result.arr;

But it's generally a bad idea to have global vars. Why do you need it?

Update sample code with global object

globals = {};

function q(){

    globals['a'] = 123;

    globals[123] = 'qweqwe';

}

function w(){

    alert(globals.a);

    //alert(globals.123); //will not work

    alert(globals[123]); //that's OK.

}

q();

w();