题解 | #字符串字符统计#
字符串字符统计
http://www.nowcoder.com/practice/777d0cd160de485cae0b1fd1dd973b44
for of 迭代可迭代对象
function count(str) {
const m = {}
for(let k of str){
if(k === ' ') continue
if(k in m){
m[k]++
} else {
m[k] = 1
}
}
return m
} 
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