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MySQL: @variable vs. variable. What's the difference?
...ike this: @var
You can initialize this variable with a SET statement or inside a query:
SET @var = 1
SELECT @var2 := 2
When you develop a stored procedure in MySQL, you can pass the input parameters and declare the local variables:
DELIMITER //
CREATE PROCEDURE prc_test (var INT)
BEGIN
DECLAR...
How do I set up a basic Ruby project?
...d executables go in bin
When in doubt, just look at how other gems are laid out.
Further information:
You should add rspec as a development dependency in your gemspec to make things easier for other developers
Edit my_lib.gemspec, adding gem.add_development_dependency 'rspec' and gem.add_dev...
Enable access control on simple HTTP server
...ing on the Python version you are using, put one of the following codes inside.
Then you can do python simple-cors-http-server.py and it will launch your modified server which will set the CORS header for every response.
With the shebang at the top, make the file executable and put it into your PA...
Proper SCSS Asset Structure in Rails
...clude this sheet somewhere in your css imports, it will then not only override the browser default styles, but also any styles defined in all css files that were loaded before it. This goes the same for variables and mixins.
After seeing a presentation by Roy Tomeij at Euruko2012 I decided for the ...
What's with 181783497276652981 and 8682522807148012 in Random (Java 7)?
...ation times fall in the same millisecond range, they will give completely identical sequences. (same seed => same sequence)
The second one is not thread safe. Multiple threads can get identical RNGs when initializing at the same time. Additionally, seeds of subsequent initializations tend to be...
What is the significance of 1/1/1753 in SQL Server?
...2, 1492, and July 4, 1776? Do
you include those missing 12 days? To
avoid having to solve this problem,
the original Sybase SQL Server
developers decided not to allow dates
before 1753. You can store earlier
dates by using character fields, but
you can't use any datetime functions
wi...
Call method in directive controller from other controller
...g about how I would implement something like this.
I came up with this (fiddle);
Basically, instead of trying to call a directive from a controller, I created a module to house all the popdown logic:
var PopdownModule = angular.module('Popdown', []);
I put two things in the module, a factory f...
Difference between a “coroutine” and a “thread”?
...cedures AKA functions -- they just pass the baton among each other more fluidly).
Threads are (at least conceptually) a form of concurrent processing: multiple threads may be executing at any given time. (Traditionally, on single-CPU, single-core machines, that concurrency was simulated with som...
Load view from an external xib file in storyboard
...
My full example is here, but I will provide a summary below.
Layout
Add a .swift and .xib file each with the same name to your project. The .xib file contains your custom view layout (using auto layout constraints preferably).
Make the swift file the xib file's...
Android destroying activities, killing processes
Hi I'm wondering how Android is managing memory and I can't find precise answer anywhere.
Let's assume I have an application with 5 activities on current activity stack (4 are stopped and 1 is resumed), there is no service connected. I press HOME button so that all of my activities are stopped.
I st...