2022.05.18 TIL

35. 문자열 정렬하기

function solution(strings, n) {
    let sortString=[]

    for(i=0; i<strings.length; i++){
        addCha = strings[i][n]
        strings[i] = addCha+strings[i]
    }

    strings.sort()

    for(i=0; i<strings.length; i++){
        strings[i] = strings[i].replace(strings[i][0],"")
        sortString.push(strings[i])
    }
    
    return sortString
    
}

36. 내림차순으로 배치하기

function solution(s) {
    
    let upperS = s.toUpperCase()
    let upperSort=[]
    let lowerSort=[]
    let answer=""

    for(i=0; i<s.length; i++){
        if(s[i] == upperS[i]){
            upperSort.push(s[i])
        }else lowerSort.push(s[i])
    }

    answer = lowerSort.sort().reverse().join('')+upperSort.sort().reverse().join('')
    
    return answer
}

37. 소수 만들기

function solution(nums) {
    let pNumberCount = 0;
    
    for(i = 0; i < nums.length; i++) {
        for(j = i+1; j < nums.length; j++) {
            for(k = j+1; k < nums.length; k++) {
                let sum = nums[i] + nums[j] + nums[k];
                if(isPrime(sum)) pNumberCount++;
            }
        }
    }
    return pNumberCount;
}

function isPrime(sum) {
    for(let i = 2; i < sum; i++)
    if(sum % i === 0) return false
    return true
}

38.숫자 문자열과 영단어

function solution(s) {
    let answer = ""
    let numArry  = ['zero','one','two','three','four','five','six','seven','eight','nine']
    let matchNum=""
    
    for(i=0; i<s.length; i++){
        if(isNaN(s[i]) == false){ 
            answer += s[i]
        }else{                     
            matchNum += s[i]		
            for(j=0; j<numArry.length; j++){ 
                if(matchNum == numArry[j]){
                    answer += j
                    matchNum = ""
                }
            }
        }
    }
        
    return Number(answer)
}