數組對象排序方法及默認地址和時間戳排序 - dom-liu－IT工程師數位筆記本

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數組排序的話最常用的就是array.sort()這個方法了。

sort()里面傳入一個方法來比較大小的值；

function compare(a,b) {
    return a-b;
}

對象進行比較的話：按照時間排序

function minor (name) {
                return function(o, p){  
                    var a, b;  
                    if (typeof o === "object" && typeof p === "object" && o && p) {  
                        a = o[name];  
                        b = p[name];  
                        if (a === b) {  
                            return 0;
                        }  
                        if (typeof a === typeof b) {  
                            return a < b ? 1 : -1;  
                        }  
                        return typeof a < typeof b ? 1 : -1;  
                    }  
                    else {  
                        throw ("error");  
                    }  
                }  
            }
            var employees=[];  
            employees[0]={name:"George", time:1494581848, default:0}  
            employees[1]={name:"Edward", time:2494581000, default:0}
            employees[2]={name:"555", default:0}
            employees[3]={name:"Christine", time:2491258100, default:1}  
            employees[4]={name:"Sarah", time:123125818, default:0}
            employees[5]={name:"liu", default:0}
            employees.sort(minor("time"));

還有一種方法是當兩個值相等時，拿另一個參數作為比較值

var by = function(name,minor){  
                return function(o, p){  
                    var a, b;  
                    if (typeof o === "object" && typeof p === "object" && o && p) {  
                        a = o[name];  
                        b = p[name];  
                        if (a === b) {  
                            return typeof minor === 'function' ? minor(o,p):0;
                        }  
                        if (typeof a === typeof b) {  
                            return a < b ? 1 : -1;  
                        }  
                        return typeof a < typeof b ? 1 : -1;  
                    }  
                    else {  
                        throw ("error");  
                    }  
                }  
            }
            function minor (name) {
                return function(o, p){  
                    var a, b;  
                    if (typeof o === "object" && typeof p === "object" && o && p) {  
                        a = o[name];  
                        b = p[name];  
                        if (a === b) {  
                            return 0;
                        }  
                        if (typeof a === typeof b) {  
                            return a < b ? 1 : -1;  
                        }  
                        return typeof a < typeof b ? 1 : -1;  
                    }  
                    else {  
                        throw ("error");  
                    }  
                }  
            }
            var employees=[];  
            employees[0]={name:"George", time:1494581848, default:0}  
            employees[1]={name:"Edward", time:2494581000, default:0}
            employees[2]={name:"555", default:0}
            employees[3]={name:"Christine", time:2491258100, default:1}  
            employees[4]={name:"Sarah", time:123125818, default:0}
            employees[5]={name:"liu", default:0}
            employees.sort(by("default","time"));

然后我最近要做的是默認地址排在第一位，之后的按照時間排序

function reviseSort (name) {
                return function(o, p){  
                    var a, b;  
                    if (typeof o === "object" && typeof p === "object" && o && p) {  
                        a = o[name];  
                        b = p[name];  
                        if (a === b) {  
                            return 0;
                        }  
                        if (typeof a === typeof b) {  
                            return a < b ? 1 : -1;  
                        }  
                        return typeof a < typeof b ? 1 : -1;  
                    }  
                    else {  
                        throw ("error");  
                    }  
                }  
            }

var data = [{name:"George", time:1494581848, default:0},{name:"Edward", time:2494581000, default:0},{name:"Christine", time:2491258100, default:1}, {name:"Sarah", time:123125818, default:0}]

data.sort(self.reviseSort("default"));//按照默認地址排序
var data_default = [].concat(data[0]);//獲取默認地址
data.splice(0,1);//刪除默認地址
data.sort(self.reviseSort("created"));//按照時間排序
Array.prototype.push.apply(data_default, data);//把data數組插入data_default

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