transitionIndex

Computes transition index using binary search. It is low-level API for lower and upper bounds of a sorted array.

size_t transitionIndex(Slice!(Iterator, 1, kind) slice, V v)
template transitionIndex(alias test = "a < b")
@optmath
static if(__traits(isSame, naryFun!test, test))
@optmath
size_t
transitionIndex
(
Iterator
SliceKind kind
V
)
(
auto ref Slice!(Iterator, 1, kind) slice
,
auto ref scope const V v
)
size_t transitionIndex(T[] ar, V v)
alias transitionIndex = .transitionIndex!(naryFun!test)

Members

Aliases

transitionIndex alias transitionIndex = .transitionIndex!(naryFun!test): Undocumented in source.

Functions

transitionIndex size_t transitionIndex(T[] ar, V v)
transitionIndex size_t transitionIndex(Slice!(Iterator, 1, kind) slice, V v)

Parameters

test: ordering predicate for ((array[i], value)) pairs.

Examples

// sorted: a < b
auto a = [0, 1, 2, 3, 4, 6];

auto i = a.transitionIndex(2);
assert(i == 2);
auto lowerBound = a[0 .. i];

auto j = a.transitionIndex!"a <= b"(2);
assert(j == 3);
auto upperBound = a[j .. $];

assert(a.transitionIndex(a[$ - 1]) == a.length - 1);
assert(a.transitionIndex!"a <= b"(a[$ - 1]) == a.length);

transitionIndex

Members

Aliases

Functions

Parameters

Examples

See Also

Meta

Source