I have two array.
a_array= [2,3,4]
b_array= [2,3,4,5]
I'd like to know how to check all of a_array elements are included in b_array.
I used Jquery. $.inArray( a_array, b_array ) but It can only be checked for one element.
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Dede
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What is `in_Array`? There's no native function called that in JavaScript. – Andy Jul 22 '14 at 09:41
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@Andy Perhaps the OP is using jQuery. – Bhojendra Rauniyar Jul 22 '14 at 09:43
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Ah. sorry, yeah. I used jQuery – Dede Jul 22 '14 at 09:47
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_.intersection(a_array, b_array); http://underscorejs.org/#intersection – martynas Jul 22 '14 at 09:48
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Oh! Duplicated question. Sorry for that. Actually I find out first, before I ask. But didn't see anything. May be I search with the wrong key word. Thank you all. – Dede Jul 22 '14 at 10:03
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It's still a duplicate even if people marked the wrong one. See [set intersection](http://stackoverflow.com/a/1885660/2313887) which is efectively what you are asking. – Neil Lunn Jul 22 '14 at 10:09