对象内的For循环

Question

I'm using lightGallery and I'm using dynamic creation of galleries, this is the code to generate just one image:

$(this).lightGallery({
    dynamic:true,
    dynamicEl: [{
        'src':'css/images/pictures/gal_'+id+'/1.jpg',
        'thumb':'css/images/thumbnails/gal_'+id+'/1.jpg'
    }]
});

This id variable is always the same, but I want to loop through a number which I take for example from variable x . So, if x=4 the code generated would look like this:

$(this).lightGallery({
    dynamic:true,
    dynamicEl: [{
        'src':'css/images/pictures/gal_'+id+'/1.jpg', //here's 1
        'thumb':'css/images/thumbnails/gal_'+id+'/1.jpg'
    },{
        'src':'css/images/pictures/gal_'+id+'/2.jpg', //here's 2 and so on
        'thumb':'css/images/thumbnails/gal_'+id+'/2.jpg'
    },{
        'src':'css/images/pictures/gal_'+id+'/3.jpg',
        'thumb':'css/images/thumbnails/gal_'+id+'/3.jpg'
    },{
        'src':'css/images/pictures/gal_'+id+'/4.jpg',
        'thumb':'css/images/thumbnails/gal_'+id+'/4.jpg'
    }]
});

So I guess the question is how to include a for loop inside an object, if that's even possible, thanks in advance!

Answer 1

No. It's not possible to have control structures(like loops) inside an object definition. You need to create your array of images first, like this:

var dynamicEl = [];
for (var i = 1; i <= 4; i++) {
  dynamicEl.push({
    'src':'css/images/pictures/gal_' + id + '/'+ i + '.jpg',
    'thumb':'css/images/thumbnails/gal_' + id + '/' + i + '.jpg'
  });
}

And then to pass it onto the object definition:

$(this).lightGallery({
    dynamic:true,
    dynamicEl: dynamicEl
});

Answer 2

Try this

var genEls = function(id, count)
{
    var els = [];
    for(i = 1; i <= count; i++)
    {
        els.push({
            'src':'css/images/pictures/gal_'+ id + '/' + i + '.jpg',
            'thumb':'css/images/thumbnails/gal_' + id + '/' + i + '.jpg',
        });
    }
return els;
}   

var id = 3;
var count = 4;
$(this).lightGallery({
    dynamic:true,
    dynamicEl: genEls(id,count);
});

This is as inline as it can get ;)

Hope this helps ...

Answer 3

first create a method to dynamically generate thumbs

function genThumbs(count, id)
{
   var arr = [];
   for ( var counter = 1; counter <= count; counter++)
   {
      arr.push( {
        'src':'css/images/pictures/gal_'+id+'/' + counter + '.jpg',
        'thumb':'css/images/thumbnails/gal_'+id+'/' + counter + '.jpg'
      } );
   }
   return arr;
}

then use the same while calling the gallery

$(this).lightGallery({
    dynamic:true,
    dynamicEl: genThumbs(5, id)
});