Fix Chinese Translation of the cheatsheet #1223
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He-Pin
reviewed
Nov 24, 2018
He-Pin
reviewed
Nov 24, 2018
liufengyun
reviewed
Nov 24, 2018
liufengyun
reviewed
Nov 24, 2018
liufengyun
reviewed
Nov 25, 2018
| | `for (x <- xs; y <- ys) yield x*y` _等价于_ <br>`xs flatMap {x => ys map {y => x*y}}` | for 表达式: 叉乘 | | ||
| | `for (x <- xs; y <- ys) {`<br> `println("%d/%d = %.1f".format(x, y, x/y.toFloat))`<br>`}` | for 表达式: 不可避免的格式<br>[sprintf-style](http://java.sun.com/javase/6/docs/api/java/util/Formatter.html#syntax) | | ||
| | `for (i <- 1 to 5) {`<br> `println(i)`<br>`}` | for 表达式: 包括上边界的遍历 | | ||
| | `for (i <- 1 until 5) {`<br> `println(i)`<br>`}` | for 表达式: 忽略上边界的遍历 | | ||
| | <span id="pattern_matching" class="h2">模式匹配</span> | | |
liufengyun
reviewed
Nov 25, 2018
| | <span class="label success">Good</span> `val x = 5`<br> <span class="label important">Bad</span> `x=6` | 常量 | | ||
| | `var x: Double = 5` | 显式类型 | | ||
| | <span id="functions" class="h2">函数</span> | | | ||
| | <span class="label success">Good</span> `def f(x: Int) = { x*x }`<br> <span class="label important">Bad</span> `def f(x: Int) { x*x }` | 定义函数 <br> 隐藏出错: 不加“=”号将会是一段返回Unit类型的过程，这将会导致意想不到的错误。 | | ||
| | <span class="label success">Good</span> `def f(x: Int) = { x*x }`<br> <span class="label important">Bad</span> `def f(x: Int) { x*x }` | 定义函数 <br> 潜在风险: 不加“=”号将会是一段返回Unit类型的过程，这将会导致意想不到的错误。 | |
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我觉得 @liufengyun 建议的风险挺好的。风险区别于错误。风险用于那种语法上正确，但是语义上或许不是程序员期望的那种。错误，则是直接无法编译。暂时没有细看，后续可以直接把中文和英文都改了。 @linqing
liufengyun
approved these changes
Nov 28, 2018
|
@liufengyun I've sent you an invite to https://github.com/orgs/scala/teams/team-scala/members so you can merge PRs yourself |
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Thanks a lot @SethTisue ! |
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