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Update: 1-js/02-first-steps/13-switch #448

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Merged
merged 2 commits into from
Aug 10, 2019
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Update: 1-js/02-first-steps/13-switch #448

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c639d1e
sync with: f6ff773
MartinsYong Aug 8, 2019
8ada5ca
fix according to suggestion.
MartinsYong Aug 9, 2019
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10 changes: 5 additions & 5 deletions 1-js/02-first-steps/13-switch/article.md
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
# "switch" 语句

`switch` 语句可以被多个 `if` 语句替代。
`switch` 语句可以替代多个 `if` 判断。

`switch` 语句为多分支选择的情况提供了一个更具描述性的方式。

Expand Down Expand Up @@ -87,7 +87,7 @@ alert( 'Too big' );
alert( "I don't know such values" );
```

````smart header="Any expression can be a `switch/case` argument"
````smart header="任何表达式都可以是 `switch/case` 的参数"
`switch` 和 `case` 都允许任意表达式。

比如：
Expand All @@ -107,7 +107,7 @@ switch (+a) {
alert("this doesn't run");
}
```
Here `+a` gives `1`, that's compared with `b + 1` in `case`, and the corresponding code is executed.
这里 `+a` 返回 `1`，这个值跟 `case` 中 `b + 1` 相比较，然后对应代码被执行。
````

## "case" 分组
Expand Down Expand Up @@ -139,9 +139,9 @@ switch (a) {

现在 `3` 和 `5` 都显示相同的信息。

在没有 `break` 的情况下，`switch/case` 会“分组” case。 因为没有 `break`，`case 3` 会从 `(*)` 行执行到 `case 5`。
在没有 `break` 的情况下，`switch/case` 会对 case“分组”。因为没有 `break`，`case 3` 会从 `(*)` 行执行到 `case 5`。

## 值类型
## 类型很关键

强调一下，这里的相等是严格相等。被比较的值必须是相同类型的才能匹配。

Expand Down