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Comparing strings with == which are declared final in Java
...n Java. The following segment of simple code just concatenates two strings and then compares them with == .
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Add support library to Android Studio project
I just installed the new Android Studio and I'm looking for a way to import the support library for Android.
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Can PostgreSQL index array columns?
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Yes you can index an array, but you have to use the array operators and the GIN-index type.
Example:
CREATE TABLE "Test"("Column1" int[]);
INSERT INTO "Test" VALUES ('{10, 15, 20}');
INSERT INTO "Test" VALUES ('{10, 20, 30}');
CREATE INDEX idx_test on "Test" USING GIN ("Col...
How to resize superview to fit all subviews with autolayout?
My understanding of autolayout is that it takes the size of superview and base on constrains and intrinsic sizes it calculates positions of subviews.
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What is the performance cost of having a virtual method in a C++ class?
...any of its parent classes) means that the class will have a virtual table, and every instance will have a virtual pointer.
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Relatively position an element without it taking up space in document flow
How can I relatively position an element, and have it not take up space in the document flow?
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What is the rationale for all comparisons returning false for IEEE754 NaN values?
...ify things a bit.
First off, floating-point numbers are not real numbers, and floating-point arithmetic does not satisfy the axioms of real arithmetic. Trichotomy is not the only property of real arithmetic that does not hold for floats, nor even the most important. For example:
Addition is not...
Cost of len() function
...ength of the element - very fast) on every type you've mentioned, plus set and others such as array.array.
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What, exactly, is needed for “margin: 0 auto;” to work?
...lement is used to centre it (left-right). However, I know that the element and its parent must meet certain criteria for the auto margin to work, and I can never seem to get the magic right.
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What are all the user accounts for IIS/ASP.NET and how do they differ?
...with ASP.NET 4.0 installed there is a whole slew of related user accounts, and I can't understand which one is which, how to they differ, and which one is REALLY the one that my app runs under. Here's a list:
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