【Javascript】Array sort() Method

1. 內建 Array sort

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.sort();
// output is Apple,Banana,Mango,Orange

2. 內建 reverse

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.sort();
fruits.reverse();
// output is Orange,Mango,Banana,Apple

3. Sort numbers (numerically and ascending)

var points = [40,100,1,5,25,10];
points.sort(function(a,b){return a-b});
// output is 1,5,10,25,40,100

4. Sort numbers (alphabetically and descending)

var points = [40,100,1,5,25,10];
points.sort(function(a,b){return b-a});
// output is 100,40,25,10,5,1

##### 上述例子為 w3shools Example #####
##### 以下是 object sort method #####


5. object sort numbers

var student = [{name: "Tom", score: 80}
, {name: "Mary", score: 70}
, {name: "Cathy", score: 90}];
student.sort(function(a,b){return a.score-b.score});
// output is [{name: "Mary", score: 70}, 
// {name: "Tom", score: 80}, 
// {name: "Cathy", score: 90}]

6. object sort alphabetically

var student = [{name: "Tom", score: 80}
, {name: "Mary", score: 70}
, {name: "Cathy", score: 90}];
student.sort(function(a,b){return a.name > b.name});
// output is [{name: "Cathy", score: 90}, 
// {name: "Mary", score: 70},
// {name: "Tom", score: 80}]