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When do I really need to use atomic instead of bool? [duplicate]
...nstructions that are emitted to manipulate an std::atomic<bool> may (or may not) be the same as those for an ordinary bool, but being atomic is a larger concept with wider ramifications (e.g. restrictions on compiler re-ordering). Furthermore, some operations (like negation) are overloaded on ...
Run an untrusted C program in a sandbox in Linux that prevents it from opening files, forking, etc.?
...box in Linux. Something that would prevent the program from opening files, or network connections, or forking, exec, etc?
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How do I detect if software keyboard is visible on Android Device or not?
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There is no direct way - see http://groups.google.com/group/android-platform/browse_thread/thread/1728f26f2334c060/5e4910f0d9eb898a where Dianne Hackborn from the Android team has replied. However, you can detect it indirectly by checking if the window size changed in #onMeasure. See How to check ...
How to create a hash or dictionary object in JavaScript [duplicate]
...to push a new key later in the "a". Will a.push({"key3","value3"}) work?
– Sangram Anand
Jun 17 '13 at 9:52
1
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Python subprocess.Popen “OSError: [Errno 12] Cannot allocate memory”
Note: This question was originally asked here but the bounty time expired even though an acceptable answer was not actually found. I am re-asking this question including all details provided in the original question.
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How to check if array is empty or does not exist? [duplicate]
What's the best way to check if an array is empty or does not exist?
1 Answer
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Converting Mercurial folder to a Git repository
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On Linux or anything with bash/sh or similar, or python, try with fast export:
cd
git clone git://repo.or.cz/fast-export.git
git init git_repo
cd git_repo
~/fast-export/hg-fast-export.sh -r /path/to/old/mercurial_repo
git checkout HE...
Transitions on the CSS display property
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You can concatenate two transitions or more, and visibility is what comes handy this time.
div {
border: 1px solid #eee;
}
div > ul {
visibility: hidden;
opacity: 0;
transition: visibility 0s, opacity 0.5s linear;
}
div:hover > ul {
...
What is the difference in maven between dependency and plugin tags in pom xml?
...dencies are Jar files.
But the difference between them is, most of the work in maven is done using plugins; whereas dependency is just a Jar file which will be added to the classpath while executing the tasks.
For example, you use a compiler-plugin to compile the java files. You can't use comp...
Grouping functions (tapply, by, aggregate) and the *apply family
...hat beginning useRs may have difficulty deciding which one is appropriate for their situation or even remembering them all. They may have a general sense that "I should be using an *apply function here", but it can be tough to keep them all straight at first.
Despite the fact (noted in other answer...