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C# Regex for Guid
...ersion 2.0. Languages such as Delphi, PHP, and R that
have regex features based on PCRE also support conditionals. (source http://www.regular-expressions.info/conditional.html)
The regex that follows Will match
{123}
(123)
123
And will not match
{123)
(123}
{123
(123
123}
123)
Regex:
^({)?(...
How can I use UUIDs in SQLAlchemy?
...I totally agree with you. Some of the other answers are cool for other databases, but for postgres this is the cleanest solution. (You can also set a default as uuid.uuid4).
– pacha
Apr 10 '18 at 16:38
...
How do I copy to the clipboard in JavaScript?
...3+ (~April 2015)
Mozilla Firefox 41+ (shipping ~September 2015)
Opera 29+ (based on Chromium 42, ~April 2015)
Simple Example
(may not work embedded in this site, read "important" note above)
var copyTextareaBtn = document.querySelector('.js-textareacopybtn');
copyTextareaBtn.addEventListen...
How to Batch Rename Files in a macOS Terminal?
... files frequently, consider installing a specialized tool such as the Perl-based rename utility.
On macOS you can install it using popular package manager Homebrew as follows:
brew install rename
Here's the equivalent of the command at the top using rename:
rename -n -e 's/_.*_/_/' *.png
Agai...
Java: Calling a super method which calls an overridden method
... {
System.out.println("subclass method2");
}
}
public class Demo
{
public static void main(String[] args)
{
SubClass mSubClass = new SubClass();
mSubClass.method1(mSubClass);
}
}
If you follow the call stack, you can see that this never changes, it's al...
Win32汇编--使用MASM - C/C++ - 清泛网 - 专注C/C++及内核技术
...大，可以有很多种类型，在DOS的可执行程序中，有只用到64KB的.com文件，也有大大小小的.exe文件。到了Win32环境下，又有了可以用4GB内存的PE格式可执行文件，编写不同类型的可执行文件要用.model语句定义不同的参数，具体如下 ...
Is it possible to figure out the parameter type and return type of a lambda?
...
Funny, I've just written a function_traits implementation based on Specializing a template on a lambda in C++0x which can give the parameter types. The trick, as described in the answer in that question, is to use the decltype of the lambda's operator().
template <typename T&g...
Google Maps v3 - limit viewable area and zoom level
...e zoom level - e.g. only between levels 6 and 9. And I want to use all the base map types.
12 Answers
...
Error installing mysql2: Failed to build gem native extension
...\world\app\models\city.rb to look like this
class City < ActiveRecord::Base
set_table_name "city"
end
Edit the file c:\Sites\world\config\database.yml to look like this
development:
adapter: mysql2
encoding: utf8
database: world
pool: 5
username: root
password: root
socket: /tmp/mysql.sock
...
How do you run a command for each line of a file?
...in fact, depending on sysctl superuser tool) as file descriptor:
For this demo, I will use fd 7:
exec 7<file.txt # Without spaces between `7` and `<`!
ls -l /dev/fd/
Then you could use read -u 7 this way:
while read -u 7 filename;do
ans=;while [ -z "$ans" ];do
read -p...