Function cmpVersions

js/app.js:163–177

* Compare two semantic version numbers and return the difference. * @param {string} a Version number a. * @param {string} b Version number b. * @returns {number} A positive number if a is larger than b, a negative * number if a is smaller and 0 if they are the same

(a, b)

	 * number if a is smaller and 0 if they are the same
	 */
	function cmpVersions (a, b) {
		let i, diff;
		const regExStrip0 = /(\.0+)+$/;
		const segmentsA = a.replace(regExStrip0, "").split(".");
		const segmentsB = b.replace(regExStrip0, "").split(".");
		const l = Math.min(segmentsA.length, segmentsB.length);

		for (i = 0; i < l; i++) {
			diff = parseInt(segmentsA[i], 10) - parseInt(segmentsB[i], 10);
			if (diff) {
				return diff;
			}
		}
		return segmentsA.length - segmentsB.length;
	}

	/**
	 * Start the core app.