题解 | #字符个数统计#
字符个数统计
http://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
while(line = readline()) {
var str = line.trim()
var length = str.length
var tempMap = {}
for (var i = 0; i < length; i++) {
var ch = str[i], charCode = ch.charCodeAt(0)
if (charCode >=0 && charCode <= 127) {
tempMap[ch] = 1
}
}
console.log(Object.keys(tempMap).length)
}
