I need help with bash. I have two array:
Array1=(1 2 3 4 5 6 7)
Array2=(2 5 7)
I need remove items from array1 which are in Array2. Result should be
Array3=(1 3 4 6).
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Charles Duffy
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read the answers in referenced questions. – Kent Aug 16 '17 at 13:25
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I can see another similar question here. https://stackoverflow.com/questions/2312762/compare-difference-of-two-arrays-in-bash – nagendra547 Aug 16 '17 at 13:33
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It's not quite a duplicate, but [BashFAQ #36](http://mywiki.wooledge.org/BashFAQ/036) is also relevant. – Charles Duffy Aug 16 '17 at 16:40
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One should also consider using associative arrays to avoid the need to recurse -- the O(n*m) performance characteristics of the code given in the self-answer is really quite horrid. – Charles Duffy Aug 16 '17 at 16:41
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Aside: Answering your own question is welcome here, but answering your own question *by editing that answer into the question itself* is not. This "privileges" answers, such that they can't be voted or commented on separate from the question itself, and prevents mechanisms for putting good answers first from being effective. – Charles Duffy Aug 16 '17 at 16:42