什么是最简单(最好)的方法来找到一个数组的整数和在swift? 我有一个数组叫multiples我想知道这些倍数的和。
当前回答
Swift 4示例
class Employee {
var salary: Int = 0
init (_ salary: Int){
self.salary = salary
}
}
let employees = [Employee(100),Employee(300),Employee(600)]
var sumSalary = employees.reduce(0, {$0 + $1.salary}) //1000
其他回答
另一种简单的方法:
let sumOfMultiples = ar.reduce(0) { x, y in x + y }
print(sumOfMultiples)
Swift 4示例
class Employee {
var salary: Int = 0
init (_ salary: Int){
self.salary = salary
}
}
let employees = [Employee(100),Employee(300),Employee(600)]
var sumSalary = employees.reduce(0, {$0 + $1.salary}) //1000
斯威夫特3、4、5
使用减少:
let totalamount = yourTransactionsModelArray.reduce（0） { $0 + $1.amount}
老式的理解方法:
for (var i = 0; i < n; i++) {
sum = sum + Int(multiples[i])!
}
//where n =数组中元素的个数
保持简单……
var array = [1, 2, 3, 4, 5, 6, 7, 9, 0]
var n = 0
for i in array {
n += i
}
print("My sum of elements is: \(n)")
输出:
元素的和是:37
这也是可行的:
let arr = [1,2,3,4,5,6,7,8,9,10]
var sumedArr = arr.reduce(0, combine: {$0 + $1})
print(sumedArr)
结果是:55
