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Extracting the last n characters from a string in R
...ub('.*(?=.{3}$)', '', string, perl=T)
for three characters, etc. You can set the number of characters to grab with a variable, but you'll have to paste the variable value into the regular expression string:
n = 3
sub(paste('.+(?=.{', n, '})', sep=''), '', string, perl=T)
...
How to study design patterns? [closed]
... to write classes that are highly independent and cohesive. Without a good set of tests, it is just too painful to touch something that is not broken. With safety net you will really adventure into drastic changes to your code. That is the moment when you can really start learning from practice.
No...
Can you build dynamic libraries for iOS and load them at runtime?
...dynamic;
Now, open the project with Xcode, go to Project->Edit Project Settings
2. “Installation Directory” set to @executable_path/ because I plan to put the dylib in the same directory as the app’s executable.
3. “Mach-O Type” set to Dynamic Library
4. “Executable Extension” s...
Microsoft.Office.Core Reference Missing
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Upvoted because this actually did it to me. Initially setting the references to .COM did not solve the problem.
– DrMarbuse
Nov 8 '16 at 8:58
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Developing C# on Linux
...Develop.
It is pretty much explicitly designed for use with Mono, and all set up to develop in C#.
The simplest way to install it on Ubuntu would be to install the monodevelop package in Ubuntu. (link on Mono on ubuntu.com) (However, if you want to install a more recent version, I am not sure whic...
Definitive way to trigger keypress events with jQuery
... This did not work for me with a jQuery UI slider. I had to set e.keyCode like OreiA's answer below.
– crizCraig
Feb 5 '11 at 20:35
2
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Why does InetAddress.isReachable return false, when I can ping the IP address?
...y slow, or maybe even if there is some funniness in your privileges/system settings, if could return false negatives (i.e. it could fail even though the input address is reachable).
2) The isReachable failure is an outstanding issue. Again - there are several online resources indicating that there...
How can I handle the warning of file_get_contents() function in PHP?
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You can also set your error handler as an anonymous function that calls an Exception and use a try / catch on that exception.
set_error_handler(
function ($severity, $message, $file, $line) {
throw new ErrorException($message...
How to create has_and_belongs_to_many associations in Factory girl
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What worked for me was setting the association when using the factory.
Using your example:
user = Factory(:user)
company = Factory(:company)
company.users << user
company.save!
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Get users by name property using Firebase
I'm trying to create an application where I can get/set data in specific users accounts and I was tempted by Firebase.
8 An...