Programming Technology

JavaScript tips for problem solving

Published: June 11, 2023Last updated: June 11, 2023code, JavaScript, problem solving, programming, tips

How to find the second largest?

    const secondLargest = (arr) => {
        let max = -Infinity, result = -Infinity;
        for (const num of arr) {
            if (num > max) {
                [result, max] = [max, num] 
            } else if (num < max && num > result) {
                result = num;
            }
        }
        return result;
    }

How to sort a string in JavaScript?

    const sortString = (str) => {
        return [...str].sort((a, b) => a.localeCompare(b)).join('');
    }

    or 

    const sortString = (str) => {
        return text.split('').sort().join('');
    }

How to create an array containing 1…N?

    Array.from(Array(10).keys())

    or 

    [...Array(10).keys()]