Javascript Scope and Recursion

Question

When calling this function I am expecting myStrings to be ['A','B','C','D','E','F','G'] when in fact I'm seeing ['A', 'B', 'G']. When the recursive call is made a[i] equals [['C','D'],'E','F'] however the function receives the entire myArray. Any ideas?

var myArray = ['A','B',[['C','D'],'E','F'],'G'];

var myStrings = [];

function extractStrings(a) {

    for(var i=0; i<a.length; i++) {

        if(typeof a[i] === 'string') {
            myStrings.push(a[i]);
        } else if (typeof a[i] === 'object') {
            extractStrings[a[i]];
        }
    }
}

extractStrings(myArray);
console.log(myStrings);

p.s.w.g · Accepted Answer · 2014-02-03 00:14:35Z

4

It's a simple typo:

extractStrings[a[i]];

Should be:

extractStrings(a[i]);

Demonstration

answered Feb 3, 2014 at 0:14

p.s.w.g

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1 Comment

user3034151 Over a year ago

Grrr! Time to go to bed. Thanks.

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