go range 源码
golang range 代码
文件路径：/test/ken/range.go
// run
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Test 'for range' on arrays, slices, and maps.
package main
const size = 16
var a [size]byte
var p []byte
var m map[int]byte
func f(k int) byte {
return byte(k * 10007 % size)
}
func init() {
p = make([]byte, size)
m = make(map[int]byte)
for k := 0; k < size; k++ {
v := f(k)
a[k] = v
p[k] = v
m[k] = v
}
}
func main() {
var i int
/*
* key only
*/
i = 0
for k := range a {
v := a[k]
if v != f(k) {
println("key array range", k, v, a[k])
panic("fail")
}
i++
}
if i != size {
println("key array size", i)
panic("fail")
}
i = 0
for k := range p {
v := p[k]
if v != f(k) {
println("key pointer range", k, v, p[k])
panic("fail")
}
i++
}
if i != size {
println("key pointer size", i)
panic("fail")
}
i = 0
for k := range m {
v := m[k]
if v != f(k) {
println("key map range", k, v, m[k])
panic("fail")
}
i++
}
if i != size {
println("key map size", i)
panic("fail")
}
/*
* key,value
*/
i = 0
for k, v := range a {
if v != f(k) {
println("key:value array range", k, v, a[k])
panic("fail")
}
i++
}
if i != size {
println("key:value array size", i)
panic("fail")
}
i = 0
for k, v := range p {
if v != f(k) {
println("key:value pointer range", k, v, p[k])
panic("fail")
}
i++
}
if i != size {
println("key:value pointer size", i)
panic("fail")
}
i = 0
for k, v := range m {
if v != f(k) {
println("key:value map range", k, v, m[k])
panic("fail")
}
i++
}
if i != size {
println("key:value map size", i)
panic("fail")
}
}
相关信息
相关文章
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦