[Proto-Scripty] Re: Where is ver. 2.0 is coming?
1. Declaration with value assignment
2. Declare loop variables and cache length inside of for() - this can
increase performance http://jsperf.com/caching-array-length/67 - caching
length outside of for() is slower in almost all results (all Firefox and
Safari, IE9 and some Chrome results)
3. Unnecessary return values
Example can be rewritten as:
SelectParser.select_to_array = function(select) {
var parser = new SelectParser(), _ref = select.childNodes;
for (var _i = 0, _len = _ref.length; _i _len; _i++) {
parser.add_node(_ref[_i]);
}
return parser.parsed;
};
yet another real example:
CoffeeScript (with use of Prototype):
class Chosen extends AbstractChosen
...
no_results_clear: -
nr = null
nr.remove() while nr = @search_results.down(.no-results)
CoffeeScript translated to JavaScript:
Chosen.prototype.no_results_clear = function() {
var nr, _results;
nr = null;
_results = [];
while (nr = this.search_results.down(.no-results)) {
_results.push(nr.remove());
}
return _results;
};
and pure JavaScript:
var Chosen = Class.create(AbstractChosen, {
...
no_results_clear: function() {
this.search_results.select(.no-results).invoke(remove);
},
...
});
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Re: [Proto-Scripty] Re: Where is ver. 2.0 is coming?
Hysterical!!! Thanks for that laugh!!!
On Dec 1, 2011 9:01 AM, Victor vkhomyac...@gmail.com wrote:
1. Declaration with value assignment
2. Declare loop variables and cache length inside of for() - this can
increase performance http://jsperf.com/caching-array-length/67 -
caching length outside of for() is slower in almost all results (all
Firefox and Safari, IE9 and some Chrome results)
3. Unnecessary return values
Example can be rewritten as:
SelectParser.select_to_array = function(select) {
var parser = new SelectParser(), _ref = select.childNodes;
for (var _i = 0, _len = _ref.length; _i _len; _i++) {
parser.add_node(_ref[_i]);
}
return parser.parsed;
};
yet another real example:
CoffeeScript (with use of Prototype):
class Chosen extends AbstractChosen
...
no_results_clear: -
nr = null
nr.remove() while nr = @search_results.down(.no-results)
CoffeeScript translated to JavaScript:
Chosen.prototype.no_results_clear = function() {
var nr, _results;
nr = null;
_results = [];
while (nr = this.search_results.down(.no-results)) {
_results.push(nr.remove());
}
return _results;
};
and pure JavaScript:
var Chosen = Class.create(AbstractChosen, {
...
no_results_clear: function() {
this.search_results.select(.no-results).invoke(remove);
},
...
});
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[Proto-Scripty] Sortable Dragging Items in a list
I have a list that I have added a sortable on when I drag a item to
the end of the list the positon or offset in the list moves back up
the list so I can never drag an item to the last item in the list. If
I have ghosting on as I drag the item to the bottom of the list the
ghosted image moves up the screen. I can see the y offset or delta
change as I move up and down the list so the ghosted image move away
or toward my cursor as I move it. Any help would be appreciated.
function alignPositionValues()
{
var idx=1;
$('fieldslist').select('li').each(function(listItem) {
listItem.down('input[type=hidden]').writeAttribute('value',1*idx);
idx = idx + 1;
});
Cookie.set('fieldsscroller', $('fieldsscroller').scrollTop,
{path:
'/'});
$(button-refresh).click();
}
Event.observe(window,blur,function() {
$('fieldsscroller').scrollTop = (Cookie.get('fieldsscroller')
|| 0);
});
Event.observe(window,load,function() {
$('fieldsscroller').scrollTop = (Cookie.get('fieldsscroller')
|| 0);
tsjsSyncTableWidths('fieldslist', 'fieldshdr');
Position.includeScrollOffsets = true;
Sortable.create('fieldslist', {
onUpdate: alignPositionValues,
constraint: 'vertical',
overlap: 'vertical',
ghosting: true,
scroll: 'fieldsscroller'
});
});
div id=fieldsscroller class=listbackground verticalscroller
leftborder bottomborder rightborder style=position:relative; height:
600px; top:0px; left:0px; overflow-x:auto;
div style=width:100%; height:100%
ul id=fieldslist style=list-style-type:none; padding:0px;margin:
5px
WEBOBJECT NAME=DisplayFieldsRepetition
WEBOBJECT NAME=FieldItem/WEBOBJECT
/WEBOBJECT
/ul
/div
Grant Hickey
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