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Are there any downsides to passing structs by value in C, rather than passing a pointer?
...ry is at a premium, and stack sizes may be measured in KB or even Bytes... If you're passing or returning structs by value, copies of those structs will get placed on the stack, potentially causing the situation that this site is named after...
If I see an application that seems to have excessive s...
Android - implementing startForeground for a service?
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I'd start by completely filling in the Notification. Here is a sample project demonstrating the use of startForeground().
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Any way to properly pretty-print ordered dictionaries?
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pprint.pprint(dict(data)) works well if you don't care about the order of the keys. Personally, I wish the __repr__ for OrderedDict would produce output like this but preserve the order of the keys.
– ws_e_c421
Sep 24 '15 a...
Is it possible to break a long line to multiple lines in Python [duplicate]
...e C, you can break a long line into multiple short lines. But in Python , if I do this, there will be an indent error... Is it possible?
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How to suppress scientific notation when printing float values?
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I suggest clarifying your statement to say, "you manage the display of precision yourself." The actual (Python internal) precision isn't changed, as is often done in other languages.
– JS.
Aug 22 '12...
Java rounding up to an int using Math.ceil
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int n = a / b + ((a % b == 0) ? 0 : 1);
You do a / b with always floor if a and b are both integers. Then you have an inline if-statement witch checks whether or not you should ceil instead of floor. So +1 or +0, if there is a remainder with the division you need +1. a % b == 0 checks for the re...
Comment the interface, implementation or both?
... document the interface
on implementation, document the implementation specifics
Java specific: when documenting the implementation, use {@inheritDoc} tag to "include" javadocs from the interface.
For more information:
Official javadoc documentation
Some unofficial advice.
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How to randomly pick an element from an array
...me you run the function: the random generator is supposed to have history. If it haven't, it's extremely predictable. It's not a problem at all in this case — but it should be mentioned that array[(int)(System.currentTimeMillis() % array.length)] is just as good as the proposed solution.
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Why does Java's hashCode() in String use 31 as a multiplier?
...on stackoverflow):
The value 31 was chosen because it is an odd prime. If it were even and the multiplication overflowed, information would be lost, as multiplication by 2 is equivalent to shifting. The advantage of using a prime is less clear, but it is traditional. A nice property of 31 is tha...
java.nio.file.Path for a classpath resource
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@VGR if resources in .jar file could try this ` Resource resource = new ClassPathResource("usage.txt"); BufferedReader reader = new BufferedReader(new InputStreamReader(resource.getInputStream()));` please see stackoverflow.c...