题解 | #字符统计#
字符统计
http://www.nowcoder.com/practice/c1f9561de1e240099bdb904765da9ad0
const line = readline().split("")
const obj = {}
line.forEach( item => {
if( !obj[item] ) {
obj[item] = 1
}else {
obj[item] += 1
}
})
const res = Object.keys( obj ).sort( ( a, b ) => {
if( obj[a] === obj[b] ) {
return a.charCodeAt() - b.charCodeAt()
}else {
return obj[b] - obj[a]
}
})
print( res.join("") )
