Vocabulary
splitting

Inputs and outputs

seq	a sequence
subseq	a sequence
before	a new sequence
after	a new sequence

Word description
Splits seq at the first occurrence of subseq, and outputs the pieces before and after the split. If subseq does not occur in seq, then before is just seq and after is f.

See also
split1-slice, split1-last, split1-last-slice

Definition

USING: sequences splitting.private ;

IN: splitting

: split1 ( seq subseq -- before after ) [ snip ] (split1) ;