Details

KeyTake[assoc,…] gives an Association object whose elements are in the order of the key_i.
Any key_i that does not appear in assoc is ignored.
KeyTake can be applied not only to Association objects, but also to lists of rules.
KeyTake[keys][expr] is equivalent to KeyTake[expr,keys].

Examples

Select rules from an association, given a list of keys:

Select from several associations, given a list of keys:

Select rules from a list, given keys:

Select rules from several lists:

Select from an association, using a single key:

Select from a list, using a single key:

Use the operator form of KeyTake:

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