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Is log(n!) = Θ(n·log(n))?
...og(n - 1) + log(n) (larger half of the terms of log(n!)). Actually, I just read the question and saw that the clue is stated in the question. Basically, (n/2)^(n/2) <= n! <= n^n => log((n/2)^(n/2))<=log(n!)<=log(n^n) => Θ(n/2 * log(n/2))<=log(n!)<=Θ(n*log(n))
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How to drop a database with Mongoose?
...creation script in Node.js and Mongoose.
How can I check if the database already exists, and if so, drop (delete) it using Mongoose?
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Cmake doesn't find Boost
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There is more help available by reading the FindBoost.cmake file itself. It is located in your 'Modules' directory.
A good start is to set(Boost_DEBUG 1) - this will spit out a good deal of information about where boost is looking, what it's looking for, ...
Why shouldn't I use “Hungarian Notation”?
...ple use Hungarian notation in a wrong way and are getting wrong results.
Read this excellent article by Joel Spolsky: Making Wrong Code Look Wrong.
In short, Hungarian Notation where you prefix your variable names with their type (string) (Systems Hungarian) is bad because it's useless.
Hungaria...
Is non-blocking I/O really faster than multi-threaded blocking I/O? How?
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The biggest advantage of nonblocking or asynchronous I/O is that your thread can continue its work in parallel. Of course you can achieve this also using an additional thread. As you stated for best overall (system) performance I guess it would be better to use asynchronous I/O and not multiple t...
val-mutable versus var-immutable in Scala
... because you need to store the resulting collection somewhere. If you only read from immutable collections, then use vals.
In general, make sure that you don't confuse references and objects. vals are immutable references (constant pointers in C). That is, when you use val x = new MutableFoo(), you...
What are allowed characters in cookies?
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@bobince - I know this is old, but am I reading your answer correctly to mean that spaces are not technically allowed in cookie values? "excluding semi-colon, comma and white space" [emphasis mine]
– Adam Rackis
Feb 8 '13 at 3...
size_t vs. uintptr_t
...ns that, logically, size_t should be able to hold any pointer type. I've read on some sites that I found on the Googles that this is legal and/or should always work:
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How can strings be concatenated?
...s of concatenating strings are:
join():
Very efficent, but a bit hard to read.
>>> Section = 'C_type'
>>> new_str = ''.join(['Sec_', Section]) # inserting a list of strings
>>> print new_str
>>> 'Sec_C_type'
String formatting:
Easy to read and in most ca...
Composer killed while updating
...file.
Run composer install on the live server.
composer install will then read from the .lock file, fetching the exact same versions every time rather than finding the latest versions of every package. This makes your app less likely to break, and composer uses less memory.
Read more here: https://...