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Since adding a number to itself is equivalent to doubling that number, we can express the ''double'' function as <source lang=apl inline>+⍨</source>. | Since adding a number to itself is equivalent to doubling that number, we can express the ''double'' function as <source lang=apl inline>+⍨</source>. | ||
=== Reduction === | |||
[[Reduction]] with Add gives the sum of the whole list. | |||
== Scalar mapping == | == Scalar mapping == | ||