Javascript Variables - A variable variable is required

The following code requires that the name of 2 variables are combined.

var myScroll; 
var orderit;
var id;   
$('.scrollable').each(function(){
    orderit += 1;
    $(this).开发者_开发问答attr('id', 'scrollp' + orderit);
    id = $(this).attr('id');
    myscroll = new iScroll( id );
});

So the problem is that the variable my scroll must be unique each time, so its name needs to be myscroll+orderit but I cannot name a variable like that.

Any ideas how to do this.

Marvellous

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Make myScroll an array, and push() onto it:

var myScroll = [];

var orderit;
var id;   
$('.scrollable').each(function(){
   orderit += 1;
   $(this).attr('id', 'scrollp' + orderit);
   id = $(this).attr('id');

   // push another iScroll() onto myScroll
   myScroll.push(new iScroll( id ));
 });

Note: In your code, you declared myScroll but later use myscroll. Check the case difference - I fixed it in my example.

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Trying to dynamically generate variables is the wrong approach. It can be done (though not in "strict mode"), but it isn't advised.

Instead, you should be creating a collection. You could either use an Array or an Object.

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With an Array, you can use .map() to build a collection. Then use .toArray() to generate an Array.

var orderit = 0;
var myScroll = $('.scrollable').map(function(){
    this.id = 'scrollp' + (++orderit);
    return new iScroll( this.id );
}).toArray();

...and access them like:

myScroll[0];
myScroll[1];
  // ...and so on

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If you instead want the myScroll1, myScroll2 names, then use an Object.

var orderit = 0;
var scrolls = {};
$('.scrollable').each(function(){
    this.id = 'scrollp' + (++orderit);
    scrolls[ 'myScroll' + orderit ] = new iScroll( this.id );
});

...and access them like:

scrolls.myScroll1;
scrolls.myScroll2;
  // ...and so on

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FYI: There's no need for .attr() to get and set the ID of an element. Just access it directly with this.id as I did in my answer.

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EDIT: I used the wrong value to build the object properties. Fixed.