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RegEx match open tags except XHTML self-contained tags
...a limited, one-time job.
Regexes worked just fine for me, and were very fast to set up.
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Read an Excel file directly from a R script
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Much faster than xlsx. Read time are like read.xlsx2, but it infers types.
– Steve Rowe
May 19 '15 at 18:45
1...
Sort a Map by values
...en it doesn't have a value until after the put, i.e., it will break really fast
Point 1 is a bit of a deal-breaker for me; google collections is incredibly lazy (which is good: you can do pretty much every operation in an instant; the real work is done when you start using the result), and this re...
How are zlib, gzip and zip related? What do they have in common and how are they different?
...a format, which compresses quite a bit better than Unix compress, has very fast decompression, and adds a CRC-32 as an integrity check for the data. The header format also permits the storage of more information than the compress format allowed, such as the original file name and the file modificat...
Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
...c which allows gcc to reassociate floating point operations, or even the -ffast-math option which allows even more aggressive tradeoffs of accuracy against speed.
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When to use an object instance variable versus passing an argument to the method
...About passing parameters all they way up the stack, this can get ugly very fast. A rule of thumb is to keep your method signatures clean and elegant. If you see many methods using the same data, decide either if it's important enough to be a class member, and if it's not, refactor your code to have ...
What is the C runtime library?
... archive will usually contain at least some indexing to make it relatively fast/easy to find and extract the data from the internal files. At least at times, Microsoft has used a library format with an "extended" index the linker can use to find which functions are implemented in which of the sub-fi...
When should we use mutex and when should we use semaphore
... behavior, that is not provided by binary semaphore, such are spin-lock or fast-lock or recursive-locks.
You can usually customize mutexes with attributes, but customizing semaphore is nothing but writing new semaphore.
2. you want lightweight OR faster primitive
Use semaphores, when what you want ...
vs
...ne way, but up. In tech's case, that's phasing out the old (really, REALLY fast)
Documentation: HTML meta charset Attribute—W3Schools
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Why do we need virtual functions in C++?
...ch, much more expensive than regular function calls. The C++ philosophy is fast by default, so virtual calls by default are a big no-no. The second reason is that virtual calls can lead to your code breaking if you inherit a class from a library and it changes its internal implementation of a publi...