mapc

(mapc function list)

Applies function to each element of list for its side effects, discarding the results, and returns the original list. Use it instead of mapcar when you only care about the effect (such as printing). Single-list form only.

The argument must be a list (nil, the empty list, is accepted); passing a non-list such as a string signals an error rather than silently doing nothing. Use map to map over a string or vector.

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