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Is there a builtin identity function in python?
...ing "multiple values" in Python is to return a tuple of the values - technically that's one return value but it can be used in most contexts as if it were multiple values. But doing that here means you get
>>> def mv_identity(*args):
... return args
...
>>> mv_identity(1,2,3)
...
How to get the body's content of an iframe in Javascript?
...// or
var iframeContent = iframeDocument.querySelectorAll('#frameBody');
Call functions in the iframe
Get just the window element from iframe to call some global functions, variables or whole libraries (e.g. jQuery):
var iframeWindow = iframe.contentWindow;
// you can even call jQuery or other ...
Create singleton using GCD's dispatch_once in Objective-C
...and thread-safe way to create an instance of your class. It may not technically be a "singleton" (in that there can only ever be 1 of these objects), but as long as you only use the [Foo sharedFoo] method to access the object, this is good enough.
...
ASP.NET MVC controller actions that return JSON or partial html
...ctionMethod() {
return Json(new {foo="bar", baz="Blech"});
}
Then just call the action method using Ajax. You could use one of the helper methods from the ViewPage such as
<%= Ajax.ActionLink("SomeActionMethod", new AjaxOptions {OnSuccess="somemethod"}) %>
SomeMethod would be a javascr...
中文网（自研/维护）拓展 · App Inventor 2 中文网
...tyNotification
获得优先通知。
事件
CallbackButtonAction(nameAction)
单击任何操作按钮时，该块将返回相应按钮的名称。
CallbackButtonProgress(nameButton)
返回进度通知中按下的操作按钮的名称。
CallbackMessage(message,...
Programmatically update widget from activity/service/receiver
...
It call the onRecieve override method. But i want how to call onUpdate method.
– Amit Thaper
Feb 18 '13 at 6:52
...
Sequence contains no elements?
...
In case of async call use .FirstOrDefaultAsync();
– Andrea Girardi
Sep 21 '18 at 14:57
add a comment
...
Adding options to select with javascript
...t.innerHTML = i;
select.appendChild(opt);
}
}
}
// calling the function with all three values:
populateSelect('selectElementId',12,100);
// calling the function with only the 'id' ('min' and 'max' are set to defaults):
populateSelect('anotherSelect');
// calling the functio...
How to change the session timeout in PHP?
...ver the session GC kicks in.
GC is a potentially expensive process, so typically the probability is rather small or even zero (a website getting huge numbers of hits will probably forgo probabilistic GC entirely and schedule it to happen in the background every X minutes). In both cases (assuming no...
Android - Set fragment id
...
You can't set a fragment's ID programmatically.
There is however, a String tag that you can set inside the FragmentTransaction which can be used to uniquely identify a Fragment.
As Aleksey pointed out, you can pass an ID to FragmentTransaction's add(int, Fragment)...