guanxc9876
commented
3 years ago getValue() {
const valList = []
function handleLetter(str, idx) {
if ((str[idx] >= 'a' && str[idx] <= 'z') || (str[idx] >= 'A' && str[idx] <= 'Z')) {
valList.push(idx)
}
}
function handle(str, direction = null, val = 0) {
let low
let high
if (direction === 'left') {
low = 0
high = val - 1
} else {
low = val
high = str.length - 1
}
if (low > high) return
const mid = Math.floor((low + high) / 2)
if (mid === low === high) return
handleLetter(str, mid)
if (mid === val) return
if (mid + 1 === str.length - 1) {
handleLetter(str, mid + 1)
return
}
console.log('=====')
if (Number(valList.length) === Number(str.length)) {
[...new Set(valList)]
console.log('valList', JSON.parse(JSON.stringify(valList)))
return
}
(function(i) {
setTimeout(function() {
handle(str, 'right', i)
handle(str, 'left', i)
}, 0)
})(mid)
}
handle('1a2b3d4e5f6g7h8i9j')
console.log('===aaaaaaaaaaaaaaaaaaa====', valList)
},废了，获取字母下标陷入死循环，还能不能抢救下
移出字符串的字母为啥还得要二分法。。。