KeySelect

KeySelect(<|key1->value1, ...|>, head)

returns an association of the elements for which head(keyi) returns True.

KeySelect({key1->value1, ...}, head)

returns an association of the elements for which head(keyi) returns True.

Examples

>> r = {beta -> 4, alpha -> 2, x -> 4, z -> 2, w -> 0.8};

>> KeySelect(r, MatchQ(#,alpha|x)&)
<|alpha->2,x->4|>

Implementation status

• ✅ - full supported

Github

• Implementation of KeySelect