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What is the difference between double-ampersand (&&) and semicolon (;) in Linux Bash?
What is the difference between ampersand and semicolon in Linux Bash ?
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What's the difference between .so, .la and .a library files?
I know an .so file is a kind of dynamic library (lots of threads can share such libraries so there is no need to have more than one copy of it in memory). But what is the difference between .a and .la ? Are these all static libraries?
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Why can't I access DateTime->date in PHP's DateTime class?
Using the DateTime class, if I try to run the following code:
5 Answers
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MongoDB atomic “findOrCreate”: findOne, insert if nonexistent, but do not update
as the title says, I want to perform a find (one) for a document, by _id, and if doesn't exist, have it created, then whether it was found or was created, have it returned in the callback.
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keep rsync from removing unfinished source files
I have two machines, speed and mass. speed has a fast Internet connection and is running a crawler which downloads a lot of files to disk. mass has a lot of disk space. I want to move the files from speed to mass after they're done downloading. Ideally, I'd just run:
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What is “Power Save Mode” in IntelliJ IDEA and other Jetbrains IDEs?
I see no readily available Google search results that answer this question. What is it, and what is it used for?
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git push fails: RPC failed; result=22, HTTP code = 411
I have only one branch. For a few months I have been using
5 Answers
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Start thread with member function
I am trying to construct a std::thread with a member function that takes no arguments and returns void . I can't figure out any syntax that works - the compiler complains no matter what. What is the correct way to implement spawn() so that it returns a std::thread that executes test() ?
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How can I get the intersection, union, and subset of arrays in Ruby?
I want to create different methods for a class called Multiset .
3 Answers
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Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.
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