3check ( ..a x y z quot: ( ..a x y z -- ..b ? ) -- ..b x y z ? )
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Vocabulary
kernel

Inputs

x	an object
y	an object
z	an object
quot	a quotation

Outputs

x	an object
y	an object
z	an object
?	a boolean

Word description
Calls quot on x, y, and z and keeps those three values under the boolean result from the quot.

Examples
True case:

USING: arrays kernel math prettyprint ; 3 4 5 [ + + even? ] 3check 4array .
{ 3 4 5 t }

False case:

USING: arrays kernel math prettyprint ; 3 4 5 [ + + odd? ] 3check 4array .
{ 3 4 5 f }

See also
1check, 1guard, 2check, 2guard, 3guard

Definition

IN: kernel

: 3check
    ( ..a x y z quot: ( ..a x y z -- ..b ? ) -- ..b x y z ? )
    3keep roll ; inline