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What is the difference between Gemfile and Gemfile.lock in Ruby on Rails
...ndler records the exact versions that were installed. This way, when the same library/project is loaded on another machine, running bundle install will look at the Gemfile.lock and install the exact same versions, rather than just using the Gemfile and installing the most recent versions. (Running d...
Turn a simple socket into an SSL socket
...mple has it in the root). There are a lot of good tutorials out there.
Some documentation and tools from HP (see chapter 2)
Command line for OpenSSL
Some includes:
#include <openssl/applink.c>
#include <openssl/bio.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
Y...
Synchronization vs Lock
...y serialize the control in order to access the critical resource. It gives method such as park() and unpark() .
11 Ans...
Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
...unt: React: Rethinking best practices -- JSConf EU 2013 ) and the speaker mentioned that dirty-checking of the model can be slow. But isn't calculating the diff between virtual DOMs actually even less performant since the virtual DOM, in most of the cases, should be bigger than model?
...
How to update SQLAlchemy row entry?
Assume table has three columns: username , password and no_of_logins .
5 Answers
5...
How do I pull my project from github?
...mputer and I am wondering which git command should I invoke under my username to checkout my project again so that I can push my latest changes to github under my account.
...
Using arrays or std::vectors in C++, what's the performance gap?
...of assembly code generated for basic indexing, dereferencing,
// and increment operations on vectors and arrays/pointers.
// Assembly code was generated by gcc 4.1.0 invoked with g++ -O3 -S on a
// x86_64-suse-linux machine.
#include <vector>
struct S
{
int padding;
std::vector<...
What is Castle Windsor, and why should I care?
I'm a long-time Windows developer, having cut my teeth on win32 and early COM. I've been working with .NET since 2001, so I'm pretty fluent in C# and the CLR. I'd never heard of Castle Windsor until I started participating in Stack Overflow. I've read the Castle Windsor "Getting Started" guide, b...
What kind of virtual machine is BEAM (the Erlang VM)?
...tem virtual machine" or a "process virtual machine". It's kind of fuzzy to me where BEAM lies. Is there another kind of virtual machine I am not aware of?
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