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Apply

Usage

• Apply[f, expr] or f @@ expr replaces the head of expr by f.
• Apply[f, expr, levelspec] replaces heads in parts of expr specified by levelspec.


Notes

• Examples: Apply[f, a, b, c ]LongRightArrow ; Apply[Plus, g[a, b]]LongRightArrow .
• Level specifications are described in Section A.3.6.
• The default value for levelspec in Apply is {0}.
• f @@@ expr is equivalent to Apply[f, expr, {1}].
• Examples: Apply[f, a,b , c,d ]LongRightArrow .
• Apply[f, a,b , c,d , 1 ]LongRightArrow .
• Apply[f, a , -2]LongRightArrow .
• Apply operates on SparseArray objects just as it would on the corresponding ordinary lists.
• See Section 2.2.3.
• See also: Map, Scan, Level, Operate, MapThread, Total.
• New in Version 1; modified in 4.
Further Examples


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