October 2015
Beginner to intermediate
400 pages
14h 44m
English
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5.6 Anonymous Functions
Named functions can be declared only at the package level, but we can
use a function literal to denote a function value within any
expression.
A function literal is written like a function declaration, but without
a name following the func keyword.
It is an expression, and its value is called an
anonymous function.
Function literals let us define a function at its point of use.
As an example, the
earlier call to strings.Map can be rewritten as
strings.Map(func(r rune) rune { return r + 1 }, "HAL-9000")
More importantly, functions defined in this way have access to the entire lexical environment, so the inner function can refer to variables from the enclosing function, as this example ...
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