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What are the Ruby Gotchas a newbie should be warned about? [closed]
...ion is already true.
Because constants are references to objects, changing what a constant refers to generates a warning, but modifying the object itself does not. For example, Greeting << " world!" if Greeting == "Hello" does not generate an error or warning. This is similar to final variable...
Preferred way of loading resources in Java
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Work out the solution according to what you want...
There are two things that getResource/getResourceAsStream() will get from the class it is called on...
The class loader
The starting location
So if you do
this.getClass().getResource("foo.txt");
it w...
What is the difference between Android margin start/end and right/left?
What is difference between Android margin start and right (or margin end and left)?
2 Answers
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What REALLY happens when you don't free after malloc?
...ou still have around on program exit. It's more of an exercise in knowing what memory you're using, and thinking about whether you still need it. If you don't keep track, you might have memory leaks.
On the other hand, the similar admonition to close your files on exit has a much more concrete re...
How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
A very frequently asked question here is how to do an upsert, which is what MySQL calls INSERT ... ON DUPLICATE UPDATE and the standard supports as part of the MERGE operation.
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What exactly are “spin-locks”?
I always wondered what they are: every time I hear about them, images of futuristic flywheel-like devices go dancing (rolling?) through my mind...
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How to calculate time difference in java?
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what about the other way? 16:00 - 19:00? How can I calculate this?
– Alex Kapustian
Dec 28 '11 at 17:00
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failed to serialize the response in Web API
... This answer does not provide a solution to use xml, and that is what he asked for.
– honestduane
Dec 6 '15 at 20:32
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Is there a perfect algorithm for chess? [closed]
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What makes the weather difficult to forecast are the chaotic non-linear factors, not any quantum effects. Given enough computing power and knowledge, We could in theory create a "correct" weather forecast.
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What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
What does ArrayIndexOutOfBoundsException mean and how do I get rid of it?
25 Answers
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