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Measure time in Linux - time vs clock vs getrusage vs clock_gettime vs gettimeofday vs timespec_get?
...ey are considered to be wall clocks. Both time and gettimeofday return, at least nowadays, seconds since epoch (a.k.a. unix-timestamps). This is independent of time zones / DST. Leap seconds are another story...
– Zulan
May 7 '16 at 7:18
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Accessing inactive union member and undefined behavior?
...alization) contained in a union, the lifetime of the object encompasses at least the lifetime of the union itself. This allows us to invoke
3.9.2 Compound types [basic.compound]
If an object of type T is located at an address A, a pointer of type cv T* whose value is the
address A is sa...
Why doesn't std::queue::pop return value.?
...return it. When I first came across STL stacks I was surprised, to say the least, about pop not returning anything. See for example on wikipedia.
– Cris Luengo
Jan 20 '18 at 19:50
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PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
...es to achieve the "unique" id, the greater the probability of occurring at least one collision (see en.wikipedia.org/wiki/Birthday_problem). The probability may be tiny for most of solutions but it still exists.
– Dariusz Walczak
Jul 14 '11 at 12:30
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How to abandon a hg merge?
...bly use some kind of code formatter tool to do the entire operation, or at least some find and replace with regular expressions. Something as simple as replacing what matches ^____ (use 4 spaces instead of underscores) with __ (2 spaces), repeated a few times (unless you have insanely some nested co...
Checkstyle vs. PMD
...dBugs. In my experience, the false-positive rate is very low, and even the least-critical warnings it reports are worth addressing to some extent.
As for Checkstyle vs. PMD, I would not use Checkstyle since it is pretty much only concerned with style. In my experience, Checkstyle will report on a t...
How to cast/convert pointer to reference in C++
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bhhaaa, I added the "I guess" because it made me write at least 30 chars. that's also way I add the "..........."
– Roee Gavirel
Apr 16 '12 at 11:41
10
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Get a list of all threads currently running in Java
...ge.
That's to do it programmatically. If you just want a list on Linux at least you can just use this command:
kill -3 processid
and the VM will do a thread dump to stdout.
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Comparison of DES, Triple DES, AES, blowfish encryption for data
...tances of DES (with distinct keys). 3DES is believed to be secure up to at least "2112" security (which is quite a lot, and quite far in the realm of "not breakable with today's technology"). But it is slow, especially in software (DES was designed for efficient hardware implementation, but it sucks...
How do I get the filepath for a class in Python?
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Agreed. Django is one of the frameworks with the least amount of "magic", but templates, template tags and apps have some expectations as part of their pattern. If you're having to do wacky class inference you're probably going in the wrong direction.
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