Pick

Elements of list whose corresponding element of sel matches patt (default True).

✓ checked against that system · ! checked, with disagreements (hover a chip)Wolfram LanguagePick✓↗

Pick(list, sel)elements of list where the corresponding sel element is True

Pick(list, sel, patt)elements of list where the corresponding sel element matches patt

Typed signatures

Type	Package	Applies
(list<any>, list<any>, any?) -> list<any>	combinatorics	always

Domain: Collections

Details

• list and sel must be the same length.
• Matching uses the same wildcard grammar as MatchQ.

Examples

Basic #

live ↗

In$\mathrm{Pick}(\bigl\lbrack a, b, c\bigr\rbrack, \bigl\lbrack\mathrm{True}, \mathrm{False}, \mathrm{True}\bigr\rbrack)$Out$\bigl\lbrack a, c\bigr\rbrack$

live ↗

In$\mathrm{Pick}(\bigl\lbrack a, b, c, d, k\bigr\rbrack, \bigl\lbrack1, 0, 1, 0, 0\bigr\rbrack, 1)$Out$\bigl\lbrack a, c\bigr\rbrack$

live ↗

In$\mathrm{Pick}(\bigl\lbrack\bigl\lbrack a, b, c\bigr\rbrack, \bigl\lbrack d, k, f\bigr\rbrack\bigr\rbrack, \bigl\lbrack\bigl\lbrack1, 0, 0\bigr\rbrack, \bigl\lbrack0, 1, 1\bigr\rbrack\bigr\rbrack, 1)$Out$\bigl\lbrack\bigl\lbrack a\bigr\rbrack, \bigl\lbrack k, f\bigr\rbrack\bigr\rbrack$

Scope #

live ↗

In$\mathrm{Pick}(\bigl\lbrack a, b, c, d\bigr\rbrack, \bigl\lbrack1, 0, 1, 0\bigr\rbrack, 1)$Out$\bigl\lbrack a, c\bigr\rbrack$

A Boolean mask selects the corresponding elements

live ↗

In$\mathrm{Pick}(\bigl\lbrack a, b, c, d\bigr\rbrack, \bigl\lbrack\mathrm{True}, \mathrm{False}, \mathrm{False}, \mathrm{True}\bigr\rbrack)$Out$\bigl\lbrack a, d\bigr\rbrack$

About

Examples	5
Checked against	Wolfram Language 5 agree
Crosswalk	Wolfram Language

See also: Level, MatchQ