2つのオブジェクトで配列を並べ替える

Question

配列をソートする必要がありますが、2つのオブジェクトがあるため、これを行う方法がわかりません。犬の名前をアルファベット順やおもちゃの番号順に並べ替える必要があります。これどうやってするの？ Array#sortが最初にしてtoynum

arr.sort(function (a, b) { 
    return a.name.localeCompare(b.name) || a.toynum - b.toynum; 
}); 

によってあなたがデータを持つ配列を充填した後に一度だけソートする必要がカスタムのソートのために必要とし、ソートnameによりとしてあなたはソート機能を使用することができ

function start() { 
    document.getElementById("task").innerHTML="Task 8"; 
    var arr = []; 
    var vName = ""; 
    vName = prompt("Enter dog name (leave blank to stop)"); 
    vToyNum = prompt("Enter number of dog toys (leave blank to stop)"); 
    while (vName.length > 0 && vToyNum.length > 0) { 
     arr.push({name:vName,toynum:vToyNum}); 
     arr.sort({name:vName}); 
     vName = prompt("Enter dog name (leave blank to stop)"); 
     vToyNum = prompt("Enter number of dog toys (leave blank to stop)"); 
    } 
    var vOutput = "Dog names and No. of toys:" + displayDog(arr); 
    var toyTot = 0; 
    for (var val=0; val < arr.length; val++) { 
     toyTot += Number (arr[val].toynum); 
    } 
    vOutput += "<br/><br/>Total number of toys: " + toyTot; 
    document.getElementById("output").innerHTML= vOutput; 
} 

function displayDog(arr) { 
    var vOutput = ""; 
    for (var val = 0; val < arr.length; val++) { 
     vOutput += "<br/> Dog " + (val + 1) +" "+ arr[val].name 
       + ", No. of toys " + arr[val].toynum; 
    } 
    return vOutput; 
} 

Answer 1

。

function start() { 
 
    document.getElementById("task").innerHTML = "Task 8"; 
 
    var arr = [], 
 
     vName = "", 
 
     vToyNum, 
 
     vOutput, 
 
     toyTot = 0, 
 
     val, 
 
     DOG_QUESTION = "Enter dog name (leave blank to stop)", 
 
     TOY_QUESTION = "Enter number of dog toys (leave blank to stop)"; 
 

 
    vName = prompt(DOG_QUESTION); 
 
    vToyNum = prompt(TOY_QUESTION); 
 
    while (vName.length > 0 && vToyNum.length > 0) { 
 
     arr.push({ name: vName, toynum: vToyNum }); 
 
     vName = prompt(DOG_QUESTION); 
 
     vToyNum = prompt(TOY_QUESTION); 
 
    } 
 

 
    arr.sort(function (a, b) { 
 
     return a.name.localeCompare(b.name) || a.toynum - b.toynum; 
 
    }); 
 

 
    vOutput = "Dog names and No. of toys:" + displayDog(arr); 
 
    
 
    for (val = 0; val < arr.length; val++) { 
 
     toyTot += Number(arr[val].toynum); 
 
    } 
 

 
    vOutput += "<br /><br />Total number of toys: " + toyTot; 
 
    document.getElementById("output").innerHTML = vOutput; 
 
} 
 

 
function displayDog(arr) { 
 
    var val, vOutput = ""; 
 
    for (val = 0; val < arr.length; val++) { 
 
     vOutput += "<br /> Dog " + (val + 1) + " " + arr[val].name + ", No. of toys " + arr[val].toynum; 
 
    } 
 
    return vOutput; 
 
} 
 

 
start();

<div id="task"></div> 
 
<div id="output"></div>