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What techniques can be used to speed up C++ compilation times?
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Language techniques
Pimpl Idiom
Take a look at the Pimpl idiom here, and here, also known as an opaque pointer or handle classes. Not only does it speed up compilation, it also increases exception safety when combined with a n...
Add custom messages in assert?
Is there a way to add or edit the message thrown by assert? I'd like to use something like
8 Answers
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How do I create a new line in Javascript?
I am printing a pyramid of stars, I can't get the new line to print.
17 Answers
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What is the difference between LL and LR parsing?
Can anyone give me a simple example of LL parsing versus LR parsing?
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What is the meaning of “POSIX”?
...rds, specified by the IEEE, to clarify and make uniform the application programming interfaces (and ancillary issues, such as commandline shell utilities) provided by Unix-y operating systems. When you write your programs to rely on POSIX standards, you can be pretty sure to be able to port them ea...
What does void mean in C, C++, and C#?
Looking to get the fundamentals on where the term " void " comes from, and why it is called void. The intention of the question is to assist someone who has no C experience, and is suddenly looking at a C-based codebase.
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Listing and deleting Git commits that are under no branch (dangling?)
I've got a Git repository with plenty of commits that are under no particular branch, I can git show them, but when I try to list branches that contain them, it reports back nothing.
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How do I use a custom deleter with a std::unique_ptr member?
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Assuming that create and destroy are free functions (which seems to be the case from the OP's code snippet) with the following signatures:
Bar* create();
void destroy(Bar*);
You can write your class Foo like this
class Foo {
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Rails auto-assigning id that already exists
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Rails is probably using the built-in PostgreSQL sequence. The idea of a sequence is that it is only used once.
The simplest solution is to set the sequence for your company.id column to the highest value in the table with a query like this:
SELE...
Quickly create a large file on a Linux system
How can I quickly create a large file on a Linux ( Red Hat Linux ) system?
14 Answers
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