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Is JavaScript's “new” keyword considered harmful?
... check to introduce a runtime exception:
if ( !(this instanceof arguments.callee) )
throw new Error("Constructor called as a function");
(Note that this snippet is able to avoid hard-coding the constructor function name, as unlike the previous example it has no need to actually instantiate th...
What does jquery $ actually return?
...e same thing back, whether or not it has any contents is the question. Typically you can check this by using .val() (e.g. $('.myElem').val())
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What's the difference between KeyDown and KeyPress in .NET?
... that KeyPress relays the character resulting from a keypress, and is only called if there is one.
In other words, if you press A on your keyboard, you'll get this sequence of events:
KeyDown: KeyCode=Keys.A, KeyData=Keys.A, Modifiers=Keys.None
KeyPress: KeyChar='a'
KeyUp: KeyCode=Keys.A
But if...
jQuery Datepicker with text input that doesn't allow user input
...and jQuery will still be able to edit its contents.
<input type='text' id='foo' readonly='true'>
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Android Webview - Webpage should fit the device screen
...) getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
int width = display.getWidth();
Double val = new Double(width)/new Double(PIC_WIDTH);
val = val * 100d;
return val.intValue();
}
Then use
WebView web = new WebView(this);
web.setPadding(0, 0, 0, 0);
web.setInitialS...
Embed image in a element
...required for the button element, so technically <button /> is not valid, it should be <button></button>.
– Tamas Czinege
Aug 21 '15 at 16:47
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Iterating through a Collection, avoiding ConcurrentModificationException when removing objects in a
...w ArrayList<>();
// This is a clever way to create the iterator and call iterator.hasNext() like
// you would do in a while-loop. It would be the same as doing:
// Iterator<String> iterator = list.iterator();
// while (iterator.hasNext()) {
for (Iterator<String> iterator =...
On logout, clear Activity history stack, preventing “back” button from opening logged-in-only Activi
...
I can suggest you another approach IMHO more robust.
Basically you need to broadcast a logout message to all your Activities needing to stay under a logged-in status. So you can use the sendBroadcast and install a BroadcastReceiver in all your Actvities.
Something like this:
/** o...
Checking if a list is empty with LINQ
..., yes, throw an exception for null, but then add a second extension method called IsNullOrEmpty().
– devuxer
Dec 9 '11 at 20:52
1
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How do I rename a column in a database table using SQL?
...can do it with regular ALTER TABLE statement:
=> SELECT * FROM Test1;
id | foo | bar
----+-----+-----
2 | 1 | 2
=> ALTER TABLE Test1 RENAME COLUMN foo TO baz;
ALTER TABLE
=> SELECT * FROM Test1;
id | baz | bar
----+-----+-----
2 | 1 | 2
...