题解 | #获取指定字符串#
获取指定字符串
http://www.nowcoder.com/practice/4ec56ad04a9a4402a01e50a390a8060a
function captureThreeNumbers(str) {
let arr = Array.from(str)
for(let i =0;i<arr.length;i++){
let mid = parseInt(arr[i])
let left = parseInt(arr[i-1]) || -1
let right = parseInt(arr[i+1]) || -1
if(mid*2 == left+right) {
return left +'' +mid+''+right
}
}
return false
}
查看13道真题和解析