compare version source and target

compareVersion.js

if (process.argv.length < 4) {
  console.log('number of arguments is short');
  return;
}

const sourceVersion = process.argv[2];
const targetVersion = process.argv[3];

/**
 * Function
 * @param {string} source - "1.0.1"
 * @param {string} target - "1.0.0"
 * @return {number} - -1, 0, 1
 */
const compareVersion = (source, target) => {

  let sourceParts = source.split('.');
  let targetParts = target.split('.');

  sourceParts = sourceParts.map(Number);
  targetParts = targetParts.map(Number);

  let limit = Math.max(sourceParts.length, targetParts.length);

  let sPart, tPart;
  let result = 0;
  while(limit--){
    sPart = sourceParts.shift() || 0;
    tPart = targetParts.shift() || 0;

    if(sPart !== tPart){
      result = sPart > tPart ? 1 : -1;
      break;
    }
  }

  return result;
}

const result = compareVersion(sourceVersion, targetVersion);
console.log(result);