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Create a new Ruby on Rails application using MySQL instead of SQLite
...base.yml file to mysql and make sure you specify a valid username and password, and optionally, a socket:
development:
adapter: mysql2
database: db_name_dev
username: koploper
password:
host: localhost
socket: /tmp/mysql.sock
Next, make sure you edit your Gemfile to include the mysql2...
What is the canonical way to trim a string in Ruby without creating a new string?
This is what I have now - which looks too verbose for the work it is doing.
9 Answers
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Why would I make() or new()?
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Go has multiple ways of memory allocation and value initialization:
&T{...}, &someLocalVar, new, make
Allocation can also happen when creating composite literals.
new can be used to allocate values such as integers, &int is illegal:
n...
Using smart pointers for class members
... and I think I do understand how unique_ptr and shared_ptr / weak_ptr work in general. What I don't understand is the real usage. It seems like everybody recommends using unique_ptr as the way to go almost all the time. But how would I implement something like this:
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Best Practice - NSError domains and codes for your own project/app
There is a previous SO post regarding setting up error domains for your own frameworks, but what is the best practice regarding setting up error domains and custom error codes for your own project/app ?
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Can an AJAX response set a cookie?
... If not, what is my alternative solution? Should I set it with Javascript or something similar?
4 Answers
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'POCO' definition
Can someone define what exactly 'POCO' means? I am encountering the term more and more often, and I'm wondering if it is only about plain classes or it means something more?
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'size_t' vs 'container::size_type'
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The standard containers define size_type as a typedef to Allocator::size_type (Allocator is a template parameter), which for std::allocator<T>::size_type is typically defined to be size_t (or a compatible type). So for the standard case, they are the same.
However, if you use a cus...
Default visibility of class methods in PHP
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Default is public.
Class methods may be defined as public, private, or protected. Methods declared without any explicit visibility keyword are defined as public.
http://www.php.net/manual/en/language.oop5.visibility.php
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DateTime “null” value
...nt to null)? I have a class which might have a DateTime property value set or not. I was thinking of initializing the property holder to DateTime.MinValue, which then could easily be checked. I guess this is a quite common question, how do you do that?
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