gistfile1.txt

// 1
var fizzBuzz = function(n) {
    let output = [];
    
    for (let i = 1; i <= n; i++) {
        let temp = "";
        if (i % 3 == 0  && i % 5 == 0) temp += 'FizzBuzz';
        else if (i % 3 == 0) temp += 'Fizz';
        else if (i % 5 == 0) temp += 'Buzz';
        else temp += i;
        output.push(temp)
    }
    return output;
};

// 2
var halvesAreAlike = function(s) {
    let vowels = 'aeiouAEIOU';
    let counter = 0;
    for(let i = 0; i < s.length ; i++){
        if(vowels.includes(s[i])){
            if (i < s.length/2) counter += 1;
            else counter -= 1;
        }
    }
    return counter === 0;
};
let a = 'baok'
var b = halvesAreAlike(a);
console.log(b)


//3
var arrayStringsAreEqual = function(word1, word2) {
    let temp1 = "";
    let temp2 = "";
    for (let i = 0; i < word1.length; i++) {
        temp1 += word1[i];
    }
    for (let i = 0; i < word2.length; i++){
        temp2 += word2[i];
    }
    return temp1 === temp2;
};

// 4
var numIdenticalPairs = function(nums) {
    let counter = 0;
    for (let i = 0; i < nums.length; i++) {
        for (let j = 0; j < nums.length; j++) {
            if (nums[i] == nums[j] && i < j){
                counter++;
            }
        }
    }
    return counter;
};

// 5
var runningSum = function(nums) {
    var arr = [];
    var sum = 0;
    for (var i = 0; i < nums.length; i++) {
        sum += nums[i];
        arr.push(sum);
    }
    return arr;
};
console.log(runningSum([1,2,3, 4]))

// 6
var shuffle = function(nums, n) {
    
    let arrxy = [];
    for (let i = 0; i < n; i++) {
        arrxy.push(nums[i]);
        arrxy.push(nums[i+n]); 
    }
    return arrxy;
};
console.log(shuffle([2,5,1,3,4,7], 3))\

// 7
var maxProduct = function(nums) {
    let max = 0;
    for (let i = 0; i < nums.length; i++) {
        for (let j = 0; j < nums.length - 1; j++){
            if(max < (nums[i]-1)*(nums[j]-1) && i !== j){
                max = (nums[i]-1)*(nums[j]-1);
            }
        }
    }
    return max;
};

// 8
var kidsWithCandies = function(candies, extraCandies) {
    let max = 0;
    let arr = [];
    let temp= ""; 
    for (let i = 0; i < candies.length; i++) {
        if(max < extraCandies + candies[i]) {
            arr[i]= "false";
            
        }else arr[i] = "true";
        arr.push(temp);
    }
    return arr;
};

//9
var smallerNumbersThanCurrent = function(nums) {
    var arr =[];
 
    for(var j = 0; j < nums.length;j++){
       var counter = 0
        for (var i = 0; i < nums.length; i++){
            if (nums[j] > nums[i]){
                counter++
            }
        }
        arr.push(counter)
    }
    return arr
};

// 11
var arraySign = function(nums) {
    let result = 1;
    for (let i = 0; i < nums.length; i++) {
        if (nums[i] == 0) return 0;
        if (nums[i] < 0) result *= -1;
    }
    return result;
};

https://gist.github.com/NhanKhangg98/97002df85869be4e45d6f9c1f6c3a9cf#file-gistfile1-txt-L7
Dùng === thay vì ==

https://gist.github.com/NhanKhangg98/97002df85869be4e45d6f9c1f6c3a9cf#file-gistfile1-txt-L6
có thật sự phải cần tạo ra 1 biến temp mới ?