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std.algorithm: improve documentation of filter (#8514)

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std.algorithm: improve documentation of filter

Signed-off-by: Razvan Nitu <RazvanN7@users.noreply.github.com>
Merged-on-behalf-of: Petar Kirov <PetarKirov@users.noreply.github.com>
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Paul Backus 2022-07-24 16:19:21 -04:00 • committed by GitHub
parent 218512dc95
commit 4d0e74ba1c
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1 changed files with 9 additions and 6 deletions
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15
std/algorithm/iteration.d
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@ -1263,19 +1263,22 @@ public:
// filter // filter
/** /**
Implements the higher order filter function. The predicate is passed to `filter!(predicate)(range)` returns a new range containing only elements `x` in `range` for
$(REF unaryFun, std,functional), and can either accept a string, or any callable which `predicate(x)` returns `true`.
that can be executed via `pred(element)`.
The predicate is passed to $(REF unaryFun, std,functional), and can be either a string, or
any callable that can be executed via `pred(element)`.
Params: Params:
predicate = Function to apply to each element of range predicate = Function to apply to each element of range
Returns: Returns:
`filter!(predicate)(range)` returns a new range containing only elements `x` in `range` for An input range that contains the filtered elements. If `range` is at least a forward range, the return value of `filter`
which `predicate(x)` returns `true`. will also be a forward range.
See_Also: See_Also:
$(HTTP en.wikipedia.org/wiki/Filter_(higher-order_function), Filter (higher-order function)) $(HTTP en.wikipedia.org/wiki/Filter_(higher-order_function), Filter (higher-order function)),
$(REF filterBidirectional, std,algorithm,iteration)
*/ */
template filter(alias predicate) template filter(alias predicate)
if (is(typeof(unaryFun!predicate))) if (is(typeof(unaryFun!predicate)))