题解 | #第一个只出现一次的字符#
第一个只出现一次的字符
https://www.nowcoder.com/practice/1c82e8cf713b4bbeb2a5b31cf5b0417c
function FirstNotRepeatingChar(str)
{
// write code here
const map = {}
for (let i = 0; i < str.length; i++) {
if (map[str[i]]) {
map[str[i]].count++
} else {
map[str[i]] = { count: 1, index: i }
}
}
const values = Object.values(map)
for (let i = 0; i < values.length; i++) {
if (values[i].count === 1) return values[i].index
}
return -1
}
module.exports = {
FirstNotRepeatingChar : FirstNotRepeatingChar
};