if num == 0 // Do something
代替
if num == 0
{
// Do something
}
当你有几个嵌套的IF,这些大括号变得相当空间消耗.
PS.我知道我可以做以下事情：
if num == 0 {
// Do something }
但是,如果有可能的话,我仍然很好奇
let x = 10,y = 20; let max = (x < y) ? y : x ; // So max = 20
还有这么多有趣的事情：
let max = (x < y) ? "y is greater than x" : "x is greater than y" // max = "y is greater than x" let max = (x < y) ? true : false // max = true let max = (x > y) ? func() : anotherFunc() // max = anotherFunc() (x < y) ? func() : anotherFunc() // code is running func()
以下堆栈：http://codereview.stackexchange.com可以更好的为您的问题;)
编辑：注意三元运算符
By doing nothing more than replacing the ternary operator with an if else statement,the build time was reduced by 92.9%.
https://medium.com/@RobertGummesson/regarding-swift-build-time-optimizations-fc92cdd91e31#.42uncapwc
