substIfNot

Function: substIfNot { new fn list -> list }

file: 10-C-lists.muf
package: muf
status: alpha

The substIfNot function returns a copy of the given list in which all elements not satisfying fn are replaced by new:

Stack:
[ [ 'a' 'B' 'c' ]l [ 'D' 'e' 'f' ]l ]l --> list
Stack:
'_' :: upperCase? ; list substIfNot printList
Stack: "[ [ '_' 'B' '_' ]l [ 'D' '_' '_' ]l ]l"

See section nsubstIfNot.

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