v? ( mask true false -- result ) - Factor Documentation

v? ( mask true false -- result )
Factor handbook » The language » Numbers » Vector operations » Vector component- and bit-wise logic

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Vocabulary
math.vectors

Inputs

mask	a sequence of booleans
true	a sequence of numbers
false	a sequence of numbers

Outputs

result

a sequence of numbers

Word description
Creates a new sequence by selecting elements from the true and false sequences based on whether the corresponding bits of the mask sequence are set or not.

Notes
See Componentwise logic with SIMD vectors for notes on dealing with vector boolean inputs and results when using SIMD types.

See also
v<, v<=, v=, v>, v>=, vunordered?, vand, vor, vxor, vnot, vany?, vall?, vnone?

Definition

IN: math.vectors

GENERIC: v? ( mask true false -- result )

Methods

USING: kernel math.vectors ;

M: object v? [ vand ] [ vandn ] bi-curry* bi vor ; inline