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What is a regular expression for a MAC Address?
... human-friendly form is six groups of
two hexadecimal digits, separated by
hyphens - or colons :.
So:
^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})$
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When is “Try” supposed to be used in C# method names?
...
This is known as the TryParse pattern and has been documented by Microsoft. The official Exceptions and Performance MSDN page says:
Consider the TryParse pattern for members that may throw exceptions in common scenarios to avoid performance problems related to exceptions.
Thus if ...
What is a tracking branch?
...is:
$ git status
On branch master
Your branch is ahead of 'origin/master' by 1 commit.
(use "git push" to publish your local commits)
or
$ git status
On branch dev
Your branch and 'origin/dev' have diverged,
and have 3 and 1 different commits each, respectively.
(use "git pull" to merge the ...
Access “this” from Java anonymous class
...d Jul 5 '09 at 14:07
Mykola GolubyevMykola Golubyev
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Are there console commands to look at whats in the queue and to clear the queue in Sidekiq?
...e is an ergonomic API for viewing and managing queues.
It is not required by default.
require 'sidekiq/api'
Here's the excerpt:
# get a handle to the default queue
default_queue = Sidekiq::Queue.new
# get a handle to the mailer queue
mailer_queue = Sidekiq::Queue.new("mailer")
# How many j...
How to prevent ENTER keypress to submit a web form?
...
By the way: you could add a check for the input type (via event source) in the checkEnter function to exclude textarea's.
– KooiInc
Feb 25 '09 at 23:12
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How to remove multiple deleted files in Git repository
...xargs git rm
This takes the output of git status, doesn't print anything by default (sed -n), but on lines that start # deleted:, it gets rid of the # and the deleted: and prints what is left; xargs gathers up the arguments and provides them to a git rm command. This works for any number of files...
Replace duplicate spaces with a single space in T-SQL
...tr
some string with many spaces
Or the solution based on method described by @agdk26 or @Neil Knight (but safer)
both examples return output above:
SELECT REPLACE(REPLACE(REPLACE('some string with many spaces'
, ' ', ' ' + CHAR(7)), CHAR(7) + ' ', ''), ' ' + CHAR(7), ' ') AS New...
How to change int into int64?
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What is ?= in Makefile
... imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454...