打印出數組元素

Question

我想下面後輸入4名打印出來像對： ASD配對，DFS和FSD配對HKG ..

ASD ==== DFS
FSD == == HKG

function shuffle(o) { 
 
    for (var j, x, i = o.length; i; j = Math.floor(Math.random() * i), x = o[--i], o[i] = o[j], o[j] = x); 
 
    return o; 
 
}; 
 

 
function myFunction() { 
 
    var aname, i = 0, 
 
    x, names = [], 
 
    arname = []; 
 
    x = prompt("Please enter number of list:"); 
 
    //var y = prompt("Enter digits:"); 
 
    while (i < x) { 
 
    names[i] = prompt("Enter the names:", ""); 
 
    //names+=names; 
 

 
    //document.getElementById("demo").innerHTML= "The names are " + names; 
 
    i++; 
 
    } 
 
    arname = shuffle(names); 
 
    document.getElementById("demo").innerHTML = "The shufled array is " + arname; 
 
}

<p>Click the button to shuffle.</p> 
 

 
<button onclick="myFunction()">Try it</button> 
 

 

 
<p id="demo"></p>

Answer 1

function shuffle(o) { 
 
    for (var j, x, i = o.length; i; j = Math.floor(Math.random() * i), x = o[--i], o[i] = o[j], o[j] = x); 
 
    return o; 
 
}; 
 

 
function myFunction() { 
 
    var aname, i = 0, 
 
    x, names = [], 
 
    arname = []; 
 
    x = prompt("Please enter number of list:"); 
 
    while (i < x) { 
 
    names[i] = prompt("Enter the names:", ""); 
 
    i++; 
 
    } 
 
    arname = shuffle(names); 
 
    document.getElementById("demo").innerHTML = "The shuffled array is " + arname; 
 
    for (var i=0;i<arname.length;i+=2) { 
 
    document.getElementById("demo").innerHTML += '<br>'+arname[i]; 
 
    if ((i+1)<arname.length) document.getElementById("demo").innerHTML += "==="+arname[i+1]; 
 
    } 
 
}

<p>Click the button to shuffle.</p> 
 

 
<button onclick="myFunction()">Try it</button> 
 

 

 
<p id="demo"></p>