Name Rascal/Libraries/Prelude/List/takeOneFrom

Synopsis Remove an arbitrary element from a list, returns the element and the modified list.

Function tuple[&T, list[&T]] takeOneFrom(list[&T] lst)

Usage import List;

Description Select an arbitrary element from lst, and return a tuple consisting of:

• the selected element, and
• a new list consisting of all elements of lst except the selected element.

See getOneFrom to only selected an element from a list.

Examples

rascal>import List;
ok
rascal>takeOneFrom([10,20,30,40,50]);
tuple[int,list[int]]: <10,[20,30,40,50]>
rascal>takeOneFrom([10,20,30,40,50]);
tuple[int,list[int]]: <50,[10,20,30,40]>
rascal>takeOneFrom([10,20,30,40,50]);
tuple[int,list[int]]: <10,[20,30,40,50]>
rascal>takeOneFrom(["zebra", "elephant", "snake", "owl"]);
tuple[str,list[str]]: <"snake",["zebra","elephant","owl"]>
rascal>takeOneFrom(["zebra", "elephant", "snake", "owl"]);
tuple[str,list[str]]: <"elephant",["zebra","snake","owl"]>
rascal>takeOneFrom(["zebra", "elephant", "snake", "owl"]);
tuple[str,list[str]]: <"snake",["zebra","elephant","owl"]>

Questions

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