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更新基础部分代码

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Xwoder
2015-08-12 00:19:08 +08:00
parent 5da5b39f6e
commit d1309d5522
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source/chapter2/01_The_Basics.md
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@ -631,12 +631,12 @@ if let constantName = someOptional {
你可以像上面这样使用可选绑定来重写`possibleNumber`这个例子： 你可以像上面这样使用可选绑定来重写`possibleNumber`这个例子：
```swift ```swift
if let actualNumber = possibleNumber.toInt() { if let actualNumber = Int(possibleNumber) {
print("\(possibleNumber) has an integer value of \(actualNumber)") print("\'\(possibleNumber)\' has an integer value of \(actualNumber)")
} else { } else {
print("\(possibleNumber) could not be converted to an integer") print("\'\(possibleNumber)\' could not be converted to an integer")
} }
// 输出 "123 has an integer value of 123" // 输出 "'123' has an integer value of 123"
``` ```
这段代码可以被理解为： 这段代码可以被理解为：