Searching an array for a substring in Javascript

Question

I have searched across the web though have not had any luck in correcting my issue. What I want to do is search an array for a substring and return the result. An example of the array is like this:

the_array = ["PP: com.package.id, NN: Package Name","PP: com.another.id, NN: Another Name"];

What I want to do is search the_array for com.package.id making sure that it appears between the "PP:" and ",". Also please note that the array will contain several thousand values. Hope you can help, thank you.

What did you try? All you can do is iterating over the array and examine each string. — Felix Kling, Jul 30 '11 at 22:36
possible duplicate of [In javascript, how do you search an array for a substring match](http://stackoverflow.com/questions/4556099/in-javascript-how-do-you-search-an-array-for-a-substring-match) — ripper234, Sep 14 '11 at 09:59

Mrchief · Accepted Answer · 2013-07-24T03:08:42.560

2

Easy way:

the_array.join("|").indexOf([str]) >= 0;

Other ways would be to loop thru the array using .each() or a simple for loop

Array.prototype.each = function(callback){
    for (var i =  0; i < this.length; i++){
        callback(this[i]);
    }
}

the_array.each(function(elem){
    console.log(elem.indexOf('<searchString goes here>'));
});

edited Jul 24 '13 at 03:08

answered Jul 30 '11 at 22:36

Mrchief

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`each` is not a JavaScript function. – Felix Kling Jul 30 '11 at 22:37
1

FWIW, ECMAScript 5 introduced `forEach`: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/array/foreach You can also find an alternative implementation there. But it seems to me that `each` is irrelevant for the problem. – Felix Kling Jul 30 '11 at 22:46
Yes and Yes. Since ES5 is not universally supported yet, we need these workarounds. – Mrchief Jul 30 '11 at 22:48
@Mrchief it is 'each.indexOf'. Please change it. – Kamal Reddy Jul 23 '13 at 12:12
@KamalReddy: It's pseudocode, note that `[str]` is not an array but placeholder for search string in question. But I'll edit for clarity anyway. – Mrchief Jul 24 '13 at 03:07

Searching an array for a substring in Javascript

1 Answers1