Swift閉包(Closure)

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文法: 

 

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  1. { (parameters) ->return type in statements}  

 

 

 執行個體:採用函數實現:

 

 

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  1. let names =["Chris", "Alex", "Ewa", "Barry", "Daniella"]  
  2. funcbackwards(s1: String, s2: String) -> Bool {  
  3. return s1 > s2  
  4. }  
  5. var reversed = sort(names, backwards)  
  6. println(reversed)  
  7.   
  8. //sort 排序函數,backwards 通過定序的函數 採用閉包實現:  
  9. var reversed = sort(names, { (s1: String, s2: String) -> Bool in  
  10. return s1 > s2   
  11. })  
  12. println(reversed)  

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