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dd: How to calculate optimal blocksize? [closed]
...k size of 512 bytes tends to be almost an order of magnitude slower than a more optimal alternative. When in doubt, I've found that 64K is a pretty solid modern default. Though 64K usually isn't THE optimal block size, in my experience it tends to be a lot more efficient than the default. 64K also h...
How many socket connections can a web server handle?
...n have hardware TCP offload engines, ASICs designed for this specific role more efficiently than a general purpose CPU.
Good software design choices
Asynchronous IO design will differ across Operating Systems and Programming platforms. Node.js was designed with asynchronous in mind. You should use P...
Iterate through a C++ Vector using a 'for' loop
...int>::iterator it = vector.begin();
This is because it makes the code more flexible.
All standard library containers support and provide iterators. If at a later point of development you need to switch to another container, then this code does not need to be changed.
Note: Writing code which ...
Getting a random value from a JavaScript array
...the array
_.sample(['January', 'February', 'March']);
If you need to get more than one item randomly, you can pass that as a second argument in underscore:
// will return two items randomly from the array using underscore
_.sample(['January', 'February', 'March'], 2);
or use the _.sampleSize me...
Find the files that have been changed in last 24 hours
...thing before the 1 would have meant it was changed exacted one day ago, no more, no less.
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Really killing a process in Windows
...te that this is the correct answer, there's no doubt in my mind that it is more correct than taskkill below.... stupid buggy drivers!
– codetaku
Jul 22 '13 at 21:03
...
Best practice to mark deprecated code in Ruby?
...andard" way:
# my_file.rb
class MyFile
extend Gem::Deprecate
def no_more
close
end
deprecate :no_more, :close, 2015, 5
def close
# new logic here
end
end
MyFile.new.no_more
# => NOTE: MyFile#no_more is deprecated; use close instead. It will be removed on or after 2015-05-...
What is the difference between a schema and a table and a database?
...logy. I would change "floor plan" to "blue prints" because the schema has more than just tables, and blue prints contain the wiring and heating and plumbing.
– Paul Tomblin
Nov 18 '08 at 13:49
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How can I remove the first line of a text file using bash/sed script?
...g is consistent across both tools. Check the FreeBSD or OS X man pages for more.
The BSD version can be much slower than sed, though. I wonder how they managed that; tail should just read a file line by line while sed does pretty complex operations involving interpreting a script, applying regular...
MySQL Select minimum/maximum among two (or more) given values
Is it possible to SELECT the minimum or maximum among two or more values. I'd need something like this:
4 Answers
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