zero-matrix? ( object -- ? )
Matrix operations

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Vocabulary
math.matrices

Inputs and outputs

object	an object
?	a boolean

Word description
Tests if the object is an instance of the zero-matrix class.

Definition

USING: kernel math sequences sequences.deep ;

IN: math.matrices

: zero-matrix? ( object -- ? )
    dup matrix? [
        dup null-matrix?
        [ drop f ] [ flatten [ zero? ] all? ] if
    ] [ drop f ] if ;