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modified: eBook/18.1.md

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songleo
2016-01-03 14:29:25 +08:00
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eBook/18.3.md
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@@ -1,7 +1,7 @@
# 18.3 映射
创建： `map1 := make(map[keytype]valuetype)`
初始化: `map1 := map[string]int{"one": 1, "two": 2}`
创建： `map1 := make(map[keytype]valuetype)`
初始化: `map1 := map[string]int{"one": 1, "two": 2}`
（1）如何使用`for`或者`for-range`遍历一个映射：
@@ -13,13 +13,13 @@ for key, value := range map1 {
（2）如何在一个映射中检测键key1是否存在：
`val1, isPresent = map1[key1]`
`val1, isPresent = map1[key1]`
返回值: 键`key1`对应的值或者`0`, `true`或者`false`
返回值: 键`key1`对应的值或者`0`, `true`或者`false`
（3）如何在映射中删除一个键：
`delete(map1, key1)`
`delete(map1, key1)`
## 链接