Vocabulary
sequences

Inputs and outputs

seq	a mutable sequence
quot	a quotation with stack effect ( ... elt -- ... newelt )

Word description
Applies the quotation to each element yielding a new element, storing the new elements back in the original sequence. Returns the original sequence.

Errors
Throws an error if the sequence is immutable, or the sequence cannot hold elements of the type output by quot.

Side effects
Modifies seq

Definition

USING: kernel sequences.private ;

IN: sequences

: map!
( ... seq quot: ( ... elt -- ... newelt ) -- ... seq )
over [ map-into ] keep ; inline