change ( variable quot -- )
Factor handbook » The language » Dynamic variables » Changing variable values

Prev:	dec ( variable -- )
Next:	change-global ( variable quot -- )

Vocabulary
namespaces

Inputs

variable	a variable, by convention a symbol
quot	a quotation with stack effect ( old -- new )

Outputs
None

Word description
Applies the quotation to the old value of the variable, and assigns the resulting value to the variable.

Side effects
Modifies variable

See also
change-at, ?change-at, change-nth

Definition

USING: kernel ;

IN: namespaces

: change ( variable quot -- ) [ [ get ] keep ] dip dip set ;
    inline