compareSemanticVersions.js

compareSemanticVersions.js

const compareSemanticVersions = (a: string, b: string) => {
    // 1. Split the strings into their parts
    const a1 = a.split('.');
    const b1 = b.split('.');
    // 2. Contingency in case there's a 4th or 5th version
    const len = Math.min(a1.length, b1.length);
    // 3. Look through each version number and compare.
    for (let i = 0; i < len; i++) {
        const a2 = +a1[ i ] || 0;
        const b2 = +b1[ i ] || 0;
        
        if (a2 !== b2) {
            return a2 > b2 ? 1 : -1;        
        }
    }
    
    // 4. We hit this if the all checked versions so far are equal
    return b1.length - a1.length;
};

const versions = [ '7.0.0', '7.0.4', '7.2.0', '7.4.1', '7.3.1' ];
const sorted = versions.sort(compareSemanticVersions);
console.log(versions);