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Why can I throw null in Java? [duplicate]
...ointerException and not a FileNotFoundException
– php_coder_3809625
Aug 24 '16 at 5:50
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How do I check if an element is really visible with JavaScript? [duplicate]
...umentElement.clientHeight,
rects = element.getClientRects(),
on_top = function(r) {
var x = (r.left + r.right)/2, y = (r.top + r.bottom)/2;
return document.elementFromPoint(x, y) === element;
};
for (var i = 0, l = rects.length; i < l; i++) {
var r = rects[...
UIButton: set image for selected-highlighted state
....highlighted])
To set the background image we can use setBackgroundImage(_:for:)
Swift 2.x
// Normal
button.setImage(UIImage(named: "image1"), forState: .Normal)
// Highlighted
button.setImage(UIImage(named: "image2"), forState: .Highlighted)
// Selected
button.setImage(UIImage(named: "image3"...
How to remove all null elements from a ArrayList or String Array?
... answered Mar 13 '13 at 9:24
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Set custom HTML5 required field validation message
... requiredmessage="A valid E-mail address is required." pattern="^[a-zA-Z0-9_.-]+@[a-zA-Z0-9-]+.[a-zA-Z0-9]+$" />
<input type="submit" value="Send it!" />
</form>
The attribute requiredmessage is the custom attribute I talked about. You can set your message for each required fie...
Android list view inside a scroll view
...
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.appcompat.widget.LinearLayoutCompat
android:layout_width="match_parent"
android:layout_height="wrap_content"
android...
Where are iOS simulator screenshots stored?
...e also end up on the Desktop as something like: "Screen Shot 2012-04-22 at _ AM.png"
If you use the Grab application (found in /Application/Utilities), you can save those files anywhere you decide. :-)
If you have saved a screenshot to the Photos library from within your app, for example with UIGet...
How to use JUnit to test asynchronous processes
...Test {
/**
* Data limit
*/
private static final int DATA_LIMIT = 5;
/**
* Countdown latch
*/
private CountDownLatch lock = new CountDownLatch(1);
/**
* Received data
*/
private List<Data> receiveddata;
@Test
public void testData...
Where is the “Fold” LINQ Extension Method?
...heard "aggregate" outside of SQL. WP has a list en.wikipedia.org/wiki/Fold_(higher-order_function) of a couple dozen languages and C# is the only one that calls it "Aggregate". "Reduce" is the clear winner, followed by "Fold" for the ML family, and "Inject" for Smalltalk and friends.
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Android, How can I Convert String to Date?
...g before storing it in the database. In this case en.wikipedia.org/wiki/ISO_8601
– denis.solonenko
Dec 20 '11 at 9:35
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