KeyMap

KeyMap[f,key1val1,key2val2,…]

maps f over the keys in an association, giving f[key1]val1,f[key2]val2,….

KeyMap[f]

represents an operator form of KeyMap that can be applied to an expression.

Details

  • If any of the f[keyi] are identical, the values associated with later instances replace those associated with earlier ones.
  • KeyMap[f][expr] is equivalent to KeyMap[f,expr].

Examples

Basic Examples  (2)

Map a function over the keys of an association:

In[1]:=
Click for copyable input
Out[1]=

Use the operator form of KeyMap:

In[1]:=
Click for copyable input
Out[1]=

See Also

AssociationMap  Map  Keys  KeySelect  KeyValueMap

Introduced in 2014
(10.0)