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数组求和
http://www.nowcoder.com/questionTerminal/cc3ce199461c4c4cb8f63db61d7eba30
function sum(arr) { let s = 0; for(let i of arr){ s += i } return s } sum([ 1, 2, 3, 4 ])
数组求和
http://www.nowcoder.com/questionTerminal/cc3ce199461c4c4cb8f63db61d7eba30
function sum(arr) { let s = 0; for(let i of arr){ s += i } return s } sum([ 1, 2, 3, 4 ])
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