Templates

template none[T](s: openArray[T]; pred: proc (x: T): bool {.closure.}): bool

Iterates through a container and checks if no item fulfills the predicate.

Example:

let numbers = @[1, 4, 5, 8, 9, 7, 4]
assert none(numbers, proc (x: int): bool = x > 10) == true
assert none(numbers, proc (x: int): bool = x > 5) == false

template noneIt(s, pred: untyped): bool

Iterates through a container and checks if no item fulfills the predicate.

Example:

let numbers = @[1, 4, 5, 8, 9, 7, 4]
assert noneIt(numbers, it > 10) == true
assert noneIt(numbers, it > 5) == false

template partitionIt[T](s: openArray[T]; pred: untyped): tuple[t: seq[T],
    f: seq[T]]

Returns a tuple that contains two sequences. The first sequence contains the items that fulfill the predicate. The second sequence contains the items that do not fulfill the predicate.

In the tuple the two sequences are called t and f, which stand for true and false, respectively, indicating that the predicate is true / false for the elements of the sequences.

Example:

let
  temperatures = @[-272.15, -2.0, 24.5, 44.31, 99.8, -113.44]
  partitions = temperatures.partitionIt(it < 50 and it > -10)
assert partitions[0] == @[-2.0, 24.5, 44.31]
assert partitions.t == partitions[0]
assert partitions[1] == @[-272.15, 99.8, -113.44]
assert partitions.f == partitions[1]