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json array, remove all elements contained in another json array

Posted on 2015-01-22
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Last Modified: 2015-01-25
Hello Experts,

I've seen several examples on the web filtering arrays, using for example jQuery grep.
But all i see i a little more simple than what i want.

Maybe this is more simple that i think..

I have this two arrays:
var searchtag_catg       = [{ id: 2, tb: 'text2', search: 'test2'},{ id: 4, tb: 'text4', search: 'test4'}];

var categories       = [{ id: 1, tb: 'text1', search: 'test1'},{ id: 2, tb: 'text2', search: 'test2'},{ id: 3, tb: 'text3', search: 'test3'},{ id: 4, tb: 'text4', search: 'test4'}];

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And i want to show the records in the array categories that are not in searchtag_catg array, using the id key...
How can i do this?

Thx in advanced :)
Miguel
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Question by:justaphase
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2 Comments
 
LVL 51

Accepted Solution

by:
Steve Bink earned 2000 total points
ID: 40565905
Something like this:
var searchtag_id = searchtag_catg.map( function(v,i){ return v.id; } );
var good_categories = categories.filter( function(v,i) { return (searchtag_id.indexOf(v.id) < 0); } );

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Author Closing Comment

by:justaphase
ID: 40569220
Sorry i didn't answer sooner!

Steve, amazing!

Worked like a charm.

Thx :)

Miguel
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