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How does database indexing work? [closed]
...ata set increases in size, can someone explain how indexing works at a database-agnostic level?
8 Answers
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Which cryptographic hash function should I choose?
... case of a first pass search for duplicate files on your HD.
Use SHA2XX based function if you want a cryptographically secure hash function.
No one ever found any SHA512 collision. EVER. They have tried really hard. For that matter no one ever found any SHA256 or 384 collision ever. .
Don't...
What algorithm does Readability use for extracting text from URLs?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Homebrew install specific version of formula?
...to retrieve the old formulae. Let’s try it.
# First, go to the homebrew base directory
$ cd $( brew --prefix )
# Checkout some old formula
$ git checkout 6b8d25f Library/Formula/postgresql.rb
$ brew install postgresql
# … installing
Now that the older postgresql version is installed, we can r...
Why is a combiner needed for reduce method that converts type in java 8
...explains almost everything... except: why should this exclude sequentially based reduction. In my case it is IMPOSSIBLE to do it in parallel as my reduction reduces a list of functions into a U by calling each function on the intermediate result of its predecessors result. This cannot be done in par...
Python read-only property
...__(cls, **kwargs):
raise TypeError("type '{}' is not an acceptable base type".format(clss.__name__))
cls.__init_subclass__ = __init_subclass__
return cls
def methoddefiner(cls, method_name):
for clss in cls.mro():
try:
getattr(clss, method_name)
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Practical usage of setjmp and longjmp in C
...mp supports the implementation of corroutines (as much as I see it doesn't base on any non-standard or new behaviour).
EDIT:
It could be that it actually is undefined behaviour to do a longjmp down the callstack (see comment of MikeMB; though I have not yet had opportunity to verify that).
#includ...
Why doesn't c++ have &&= or ||= for booleans?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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When should one use a spinlock instead of mutex?
...est the behavior using #ifdef.
However, be sure to take the final call based on your observation, understanding as the example given is an isolated case, your project requirement, environment may be entirely different.
s...
Checking if an Android application is running in the background
...As Dianne Hackborn wrote:
These APIs are not there for applications to base their UI flow on, but to do things like show the user the running apps, or a task manager, or such.
Yes there is a list kept in memory for these things. However, it is off in another process, managed by threads run...