lcut ( list index -- before after )
Factor handbook » The language » Collections » Lists » Manipulating lists

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lappend ( list1 list2 -- newlist )

Vocabulary
lists

Inputs

list	a list
index	an integer

Outputs

before	a cons
after	a cons

Word description
Analogous to cut, this word cuts a list into two pieces at the given index.

Definition

USING: kernel math ;

IN: lists

: lcut ( list index -- before after )
    [ nil ] dip [ [ unswons ] dip cons ] times lreverse swap ;