History of Idiom 51 > diff from v3 to v4
Edit summary for version 4 by :
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Version 3
2015-07-31, 19:36:56
Version 4
2015-08-01, 17:15:05
Idiom #51 Check if map contains key
Determine whether map m contains an entry for key k
Idiom #51 Check if map contains key
Determine whether map m contains an entry for key k