or f//@expr applies f to every subexpression in expr.

Details and Options


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Basic Examples  (3)

Apply f to every subpart of an expression:

Alternative input form:

Apply h to every subpart in associations:

Generalizations & Extensions  (3)

MapAll can be used on expressions with any head:

The function can be mapped onto the heads as well:

MapAll can be used on sparse arrays:

Options  (1)

Heads  (1)

Apply f to heads as well as ordinary parts of expressions:

Applications  (1)

Show nesting structure of an expression:

Properties & Relations  (3)

Leaves are visited before roots:

MapAll is equivalent to a specific level specification in Map:

MapAll maps also around the whole expression; Map[f,expr,] does not:

Introduced in 1988