统计每个字母出现的次数

const countSort = (string) => {
  const strArr = string.split('')
  const map = {}

  for(let value of strArr){
    if(value in map){
      map[value] += 1
    }else if(value !== ' '){
      map[value] = 1
    }
  }
  return map
}

var string = 'i amasd sdf'
console.log(countSort(string))