Filter a multidimensional array by another array in javascript

Question

I'm trying to filter an array, from another array :

I have the first array :

var json = [["ID1", "Person1", "10"], ["ID2", "Person2", "20.0"], ["ID3", "Person3", "50.0"], ["ID4", "Person4", "40.0"]];

My filter array : (which is not ordered);

var filter = ["ID4", "ID1"];

And the result I would like to have :

var json = [["ID1", "Person1", "10"], ["ID4", "Person4", "40.0"]];

or

var json = [["ID4", "Person4", "40"], ["ID1", "Person1", "10.0"]];

Or just plain old iteration -> jsfiddle.net/NWQJV

adeneo
– adeneo

2013-06-14 12:56:32 +00:00
Commented Jun 14, 2013 at 12:56 — adeneo
– adeneo, Commented Jun 14, 2013 at 12:56

2 revs · Accepted Answer · 2013-06-14 13:01:56Z

2

You could do

json = json.filter(function(v) { return filter.indexOf(v[0])!==-1 })

But I'd recommend you to avoid naming json a variable not holding some JSON.

If you want to be compatible with IE8, I'd recommend to use a shim for filter and indexOf or simply to iterate using 2 for loops.

edited Jun 14, 2013 at 13:01

community wiki

2 revs
dystroy

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2 Comments

adeneo Over a year ago

That's the best solution for newer browsers, but not supported in IE8 or below. +1, but it looks strange with variable names like json and filter !

Franck Over a year ago

It works great thanks! I'll check the alternative for IE8, since I'll need it. Thanks!

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