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Select

Select[list, crit]
picks out all elements e_i of list for which crit[e_i] is True.

Select[list, crit, n]
picks out the first n elements for which crit[e_i] is True.

MORE INFORMATION

The object list can have any head, not necessarily List.

Select can be used on SparseArray objects. »

Basic Examples (3)

Select elements that are even:

Use a pure function to test each element:

Return only the first expression selected:

Generalizations & Extensions (2)

Applications (7)

Properties & Relations (1)

Cases Take Drop Reap Pick MatchQ StringMatchQ

Selecting Parts of Expressions with Functions

Conditionals

Elements of Lists

Functional Programming

Handling Arrays of Data

Language Overview

List Manipulation

Numerical Data

Demonstrations with Select (Wolfram Demonstrations Project)

NKS|Online (A New Kind of Science)

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