js实现软件版本号的比较

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<br>//js实现软件版本号的比较 //随机举两个例子 pc2.4.3 或者pc3.5.6 /**  * 输入 v1,v2  * 返回true代表v1比v2的版本新，false则代表v1与v2相等或者v1<v2; */ function versionCompare(v1,v2){     //去掉收尾空格     v1 =v1.replace(/(^\s+)|(\s+$)/gi,"");     v2 = v2.replace(/(^\s+)|(\s+$)/gi,"");     //空检查     if(!v1 || !v2){         return;     }     //截取v1,v2中的版本数字     v1 = /\d(\.|\d)*\d/gi.exec(v1)[0];     v2 = /\d(\.|\d)*\d/gi.exec(v2)[0];     //版本比较，我们分为三个数组然后比较     var arr1 = v1.split('.');     arr1 = arr1.map(function(item){         parseInt(item);     });     var arr2 = v2.split('.');     arr2 = arr2.map(function(item){         parseInt(item);     });     if(arr1[0]>arr2[0]){         return true;     }else if(arr1[0]=arr2[0]){         if(arr1[1]>arr2[1]){             return true;         }else if(arr1[1]=arr2[1]){             if(arr1[2]>arr2[2]){                 return true;             }else if(arr1[2] = arr2[2]){                 return false;             }         }     }     return false; } console.log(versionCompare("pc2.5.6","m2.43.9"));