Comments (3)
思路
转换成数字,再进行比较
由于版本号是这样的格式 a.b.c.d,且a,b,c,d的范围都是0-9,偶尔会有前导0的组合,比如001,002,所以可以用一个四位数表示,去除前导0用parseInt即可。
/**
* @param {string} version1
* @param {string} version2
* @return {number}
*/
var compareVersion = function (version1, version2) {
var a = 0,
b = 0;
version1.split(".").forEach((item, index) => {
a += parseInt(item) * 10 ** (3 - index)
});
version2.split(".").forEach((item, index) => {
b += parseInt(item) * 10 ** (3 - index)
});
return a > b ? 1 : a == b ? 0 : -1;
};
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转换成数字大小进行比较
function compareVersion(v1,v2){
v1 = v1.split('.');
v2 = v2.split('.');
let len = v1.length > v2.length ? v1.length : v2.length;
let num1 = 0,num2 = 0;
for(let i = 0; i < len; i++){
if(v1[i] !== undefined){
num1 += parseInt(v1[i]) * Math.pow(10,len-1-i);
}
if(v2[i] !== undefined){
num2 += parseInt(v2[i]) * Math.pow(10,len-1-i);
}
}
let result = num1 - num2;
return result > 0 ? 1 : (result == 0 ? 0 : -1);
}
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认领
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