19/03/14 19:55:29.27 YiVNNcx0.net
>>665 javascript
const vComp = (a, b) => {
const verA = a.split`.`;
const verB = b.split`.`;
const shorter = verA.length - verB.length < 0 ? verA : verB;
const cmps = shorter.map((v, i) => Math.sign(verA[i] - verB[i]));
return cmps.reduce((acc, v, i) => Math.sign(acc + v * 2 ** (shorter.length - i)), 0);
};
console.log(vComp('0.1.2', '0.0'));
console.log(vComp('1.2.3', '1.3'));
console.log(vComp('0.0.0', '0.0'));
結果：
1
-1
0
（おまけ）ソート：
console.log(['0.1.2', '0.0', '1.2.3', '1.3', '0.0.0', '0.0'].sort(vComp));
結果：
["0.0", "0.0.0", "0.0", "0.1.2", "1.2.3", "1.3"]