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@ variables in Ruby on Rails
...ance variable - and is available to all methods within the class.
You can read more here:
http://strugglingwithruby.blogspot.dk/2010/03/variables.html
In Ruby on Rails - declaring your variables in your controller as instance variables (@title) makes them available to your view.
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Is it worth hashing passwords on the client side
...dit All of this is error prone and tedious and somewhat hard to get right (read: secure). If ever possible, consider using authentication protocol implementations already written by knowledgeable people (unlike me! The above is only from memory of a book I read some time ago.) You really don't want ...
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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What is the difference between public, private, and protected?
...e debugger functions. They present information about a variable in a human-readable form. These three functions will reveal the protected and private properties of objects with PHP 5. Static class members will not be shown.
More resources:
The PHP Manual - OOP Properties
The PHP Manual - OOP Vi...
Cmake doesn't find Boost
...
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, ...
If REST applications are supposed to be stateless, how do you manage sessions?
I'm in need of some clarification. I've been reading about REST, and building RESTful applications. According to wikipedia, REST itself is defined to be Representational State Transfer . I therefore don't understand all this stateless gobbledeygook that everyone keeps spewing.
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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://...
How to print matched regex pattern using awk?
...out the line, which by default is called a record, denoted by $0. At least read up the documentation.
If you only want to get print out the matched word.
awk '{for(i=1;i<=NF;i++){ if($i=="yyy"){print $i} } }' file
sha...