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Programming-Idioms

History of Idiom 51 > diff from v4 to v5

Edit summary for version 5 by :
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Version 4

2015-08-01, 17:15:05

Version 5

2015-08-01, 17:15:40

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

Code 
exists($m, $k)
Code 
exists $m->{$k}