[英]Swift: Iterate through array and count Ints equal to 5
在Swift中，我将如何遍历int整数var numbers = [4,5,5,4,3]的NSMutableArray并计算有多少等于5？
您可以为此使用reduce ：
let array = [4,5,5,4,3]
let fives = array.reduce(0, combine: { $0 + Int($1 == 5) })
一种可能的解决方案：
numbers.filter {$0 == 5}.count
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