brent saner
44 lines
553 B
Go
44 lines
553 B
Go
package slicesx
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/*
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Last returns the last item/element in slice s.
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e will be the nil/zero value of the slice element type
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if the slice length is 0.
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*/
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func Last[S ~[]E, E any](s S) (e E) {
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var idx int = LastIndex(s)
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if idx < 0 {
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return
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}
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e = s[idx]
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return
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}
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/*
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LastIndex returns the index of the last element in slice s.
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If s is empty, idx will be -1.
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If s is nil, idx will be -2.
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*/
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func LastIndex[S ~[]E, E any](s S) (idx int) {
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var l int = len(s)
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idx = -2
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if s != nil {
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idx++
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}
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if l == 0 {
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return
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}
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idx = l - 1
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return
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}
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