Array sort

<pre><t> JavaScript Array sort() / reverse() 數組排序</t> sort() 對一個陣列的所有元素進行排序，並回傳此陣列。 語法 : array.<r>sort([compareFunction])</r>， compareFunction 選擇性 : 指定一個函式來定義排序順序。 假如省略此參數，陣列將根據各個元素轉為字串後， 的每一個字元之 Unicode 編碼位置值進行排序。 array.sort() //從小 至 大。 array.sort(function(a , b){ return a - b;}) //從小 至 大。 array.sort(function(b , a){ return a - b;}) //從大 至 小。 array.<r>reverse()</r> 方法會原地（in place）反轉（reverses） 一個陣列,陣列中的第一個元素變為最後一個， 而最後一個元素則變成第一個。 </pre> <style> pre,n {font-size:20px;} t {font-size:30px;color:blue;font-weight : bold; } r {color:red;} table {font-size:20px; width: 100%; border: 1px solid;} </style> <pre><div id="DP"></pre> <script> var Tx="\n <t>字符 character</t> "; var Array = ["Banana", "Orange", "Apple", "Mango"]; Tx+='<br>Array = ["Banana", "Orange", "Apple", "Mango"]<br>'; Tx+="Array.sort() = " +Array.sort() + "<br>"; Tx+="Array.reverse() = " +Array.reverse() ; Tx+= "\n\n\n <t>數字 digital</t> "; var numbers = [45, 24, 57, 6, 73 ]; Tx+="\n var numbers = [45, 24, 57, 6, 73 ]" ; Tx+="\n\n numbers.sort() = " ; Tx+= numbers.sort() ; Tx+="\n numbers.reverse() = " ; Tx+= numbers.reverse() ; Tx+="\n\n numbers.sort(function(a,b) { return a-b } ) = " ; Tx+= numbers.sort(function(a,b) { return a-b } ) Tx+="\n\n numbers.sort(function(a,b) { return b-a } ) = " Tx+= numbers.sort(function(a,b) { return b-a } ) Tx+="\n\n numbers.sort(function(b,a) { return a-b } ) = " ; Tx+= numbers.sort(function(b,a) { return a-b } ) Tx+="\n\n numbers.sort(function(b,a) { return b-a } ) = " Tx+= numbers.sort(function(b,a) { return b-a } ) DP.innerHTML=Tx; </script>

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<pre><t> Array sort() / reverse()數組排序</t> <pre><div id="DP"></div></pre> <script> var Tx=""; var Int= [{It: 'mango ' , Price: 14}, {It: 'apple ' , Price: 5}, {It: 'orange ' , Price: 8}, {It: 'lemon ' , Price: 7}, {It: 'litchi ' , Price: 35} ]; Tx+="var Int = [ {It: 'mango' , Price: 14},\n" ; Tx+=" {It: 'apple' , Price: 5},\n"; Tx+=" {It: 'orange', Price: 8},\n"; Tx+=" {It: 'lemon' , Price: 7}, \n"; Tx+=" {It: 'litchi', Price: 35} ];\n\n"; Tx+="Int.sort(function(<r>a , b</r>){return a.Price > b.Price? 1 : -1;})\n" var FruitA= Int.sort(function(a, b){return a.Price > b.Price? 1 : -1;}); for (var i = 0, l = FruitA.length; i < l; ++i) { Tx+=(FruitA[i].It+ ", " + FruitA[i].Price+ "<br/>"); } Tx+="\n\n"; Tx+="Int.sort(function(<r>b , a</r>){return a.Price > b.Price? 1 : -1;})\n" var FruitA= Int.sort(function(b, a){return a.Price > b.Price? 1 : -1;}); for (var i = 0, l = FruitA.length; i < l; ++i) { Tx+=(FruitA[i].It+ ", " + FruitA[i].Price+ "<br/>"); } Tx+="\n\n"; Tx+="Int.sort(function(<r>a , b</r>){return a.It> b.It? 1 : -1;})\n" FruitA= Int.sort(function(a , b){return a.It > b.It? 1 : -1;}); for (var i = 0, l = FruitA.length; i < l; ++i) { Tx+=(FruitA[i].It+ ", " + FruitA[i].Price+ "<br/>"); } Tx+="\n\n"; Tx+="Int.sort(function(<r>b , a</r>){return a.It> b.It? 1 : -1;})\n" FruitA= Int.sort(function(b , a){return a.It > b.It? 1 : -1;}); for (var i = 0, l = FruitA.length; i < l; ++i) { Tx+=(FruitA[i].It+ ", " + FruitA[i].Price+ "<br/>"); } Tx+="\n\n"; DP.innerHTML=Tx; </script> <style> pre,n {font-size:20px;} t {font-size:30px;color:blue;font-weight : bold; } r {color:red;} table {font-size:20px; width: 100%; border: 1px solid;} </style>

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☛ script Array JSON 陣列建構

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