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C dynamically growing array
...zeof operator, the _Alignof operator, or the unary & operator, or is a string literal used to initialize an array, an expression that has type ''array of type'' is converted to an expression with type ''pointer to type'' that points to the initial element of the array object and is not an lvalue...
Is Java Regex Thread Safe?
...a function that uses Pattern#compile and a Matcher to search a list of strings for a pattern.
5 Answers
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In Objective-C why should I check if self = [super init] is not nil?
... my superclass's initializer is non-null then is it really still worth the extra clutter to check? (Although NSObject itself doesn't seem to have any for its -init afaict…)
– natevw
Dec 17 '15 at 18:14
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Can I load a UIImage from a URL?
...image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:MyURL]]];
A much better approach is to use Apple's LazyTableImages to preserve interactivity.
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mongodb count num of distinct values per field/key
...aul what Richie said is that if the grouping is done just "regular" field (string, int etc.) then you don't need the unwind step. Isn't it correct?
– guyarad
Oct 19 '17 at 10:00
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How to create standard Borderless buttons (like in the design guideline mentioned)?
...?android:attr/selectableItemBackground"
android:text="@android:string/cancel"
android:layout_alignParentBottom="true"/>
<Button
android:id="@+id/BtnColorPickerOk"
android:layout_width="wrap_content"
android:layout_height="mat...
What exactly is Apache Camel?
...m, but they are not solutions themselves. These patterns were analyzed and extracted for the rest of us by the Gang of Four, when they published their book: Design Patterns. They saved some of us tremendous effort in thinking of how to best structure our code.
Much like the Gang of Four, Gregor Hoh...
How do I use InputFilter to limit characters in an EditText in Android?
...haracter shows up in the field. This is because the method gets a SpannableStringBuilder in source parameter with "the-blah" in it and start/end parameters spanning the whole input string... See my answer for a better solution.
– Łukasz Sromek
Sep 29 '12 at 20...
CSS center text (horizontally and vertically) inside a div block
...ontainer, but instead specify margin: auto on the flex item to take up all extra space in all four directions, and the evenly distributed margins will make the flex item centered in all directions. This works except when there are multiple flex items. Also, this technique works on MS Edge but not on...
Mongoose query where value is not null
...r query to the profiles document, something like this:
const exclude: string = '-_id -created_at -gallery -wallet -MaxRequestersPerBooking -active -__v';
// Get the _ids of users with the role equal to role.
await User.find({role: role}, {_id: 1, role: 1, name: 1}, function(err, docs) {...