right

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Right
(:)

Right, a.k.a. dex (from Latin dexter), is a function that returns its rightmost argument. 

 (:)[1;2]
2

When it accepts only one argument, it could be referred to as identity or identity function. 

 (::)1
1

In some dialects the identity function could serve as a placeholder for missing indices in square-bracket indexing or for missing arguments in projections.

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