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Updated SliceTricks (markdown)

Go101 2021-05-24 08:50:10 -04:00
parent ee9fc72909
commit 96c559eddd
1 changed files with 4 additions and 1 deletions
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5
SliceTricks.md

@ -107,12 +107,15 @@ a = append(a[:i], append(b, a[i:]...)...)
// The above one-line way copies a[i:] twice and // The above one-line way copies a[i:] twice and
// allocates at least once. // allocates at least once.
// The following verbose way only copy elements // The following verbose way only copies elements
// in a[i:] once and allocates at most once. // in a[i:] once and allocates at most once.
// But, as of Go toolchain 1.16, due to lacking of // But, as of Go toolchain 1.16, due to lacking of
// optimizations to avoid elements clearing in the // optimizations to avoid elements clearing in the
// "make" call, the verbose way is not always faster. // "make" call, the verbose way is not always faster.
// //
// Future compiler optimizations might implement
// both in the most efficient ways.
//
// Assume element type is int. // Assume element type is int.
func Insert(s []int, k int, vs ...int) []int { func Insert(s []int, k int, vs ...int) []int {
if n := len(s) + len(vs); n <= cap(s) { if n := len(s) + len(vs); n <= cap(s) {