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

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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 global variable, and assigns the resulting value to the global variable.

Side effects
Modifies variable

Definition

USING: kernel ;

IN: namespaces

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