slices

func BinarySearch ¶

func BinarySearch[S ~[]E, E constraints.Ordered](x S, target E) (int, bool)

BinarySearch searches for target in a sorted slice and returns the position where target is found, or the position where target would appear in the sort order; it also returns a bool saying whether the target is really found in the slice. The slice must be sorted in increasing order.

func BinarySearchFunc ¶

func BinarySearchFunc[S ~[]E, E, T any](x S, target T, cmp func(E, T) int) (int, bool)

BinarySearchFunc works like BinarySearch, but uses a custom comparison function. The slice must be sorted in increasing order, where "increasing" is defined by cmp. cmp should return 0 if the slice element matches the target, a negative number if the slice element precedes the target, or a positive number if the slice element follows the target. cmp must implement the same ordering as the slice, such that if cmp(a, t) < 0 and cmp(b, t) >= 0, then a must precede b in the slice.

func IsSorted ¶

func IsSorted[S ~[]E, E constraints.Ordered](x S) bool

IsSorted reports whether x is sorted in ascending order.

func IsSortedFunc ¶

func IsSortedFunc[S ~[]E, E any](x S, cmp func(a, b E) int) bool

IsSortedFunc reports whether x is sorted in ascending order, with cmp as the comparison function as defined by SortFunc.

func Max ¶

func Max[S ~[]E, E constraints.Ordered](x S) E

Max returns the maximal value in x. It panics if x is empty. For floating-point E, Max propagates NaNs (any NaN value in x forces the output to be NaN).

func MaxFunc ¶

func MaxFunc[S ~[]E, E any](x S, cmp func(a, b E) int) E

MaxFunc returns the maximal value in x, using cmp to compare elements. It panics if x is empty. If there is more than one maximal element according to the cmp function, MaxFunc returns the first one.

func Min ¶

func Min[S ~[]E, E constraints.Ordered](x S) E

Min returns the minimal value in x. It panics if x is empty. For floating-point numbers, Min propagates NaNs (any NaN value in x forces the output to be NaN).

func MinFunc ¶

func MinFunc[S ~[]E, E any](x S, cmp func(a, b E) int) E

MinFunc returns the minimal value in x, using cmp to compare elements. It panics if x is empty. If there is more than one minimal element according to the cmp function, MinFunc returns the first one.

func Sort ¶

func Sort[S ~[]E, E constraints.Ordered](x S)

Sort sorts a slice of any ordered type in ascending order. When sorting floating-point numbers, NaNs are ordered before other values.

func SortFunc ¶

func SortFunc[S ~[]E, E any](x S, cmp func(a, b E) int)

SortFunc sorts the slice x in ascending order as determined by the cmp function. This sort is not guaranteed to be stable. cmp(a, b) should return a negative number when a < b, a positive number when a > b and zero when a == b.

SortFunc requires that cmp is a strict weak ordering. See https://en.wikipedia.org/wiki/Weak_ordering#Strict_weak_orderings.

func SortStableFunc ¶

func SortStableFunc[S ~[]E, E any](x S, cmp func(a, b E) int)

SortStableFunc sorts the slice x while keeping the original order of equal elements, using cmp to compare elements in the same way as SortFunc.