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What is polymorphism, what is it for, and how is it used?
...ism and inheritance are all closely-related concepts and they're vital to know. There have been many "silver bullets" during my long career which basically just fizzled out but the OO paradigm has turned out to be a good one. Learn it, understand it, love it - you'll be glad you did :-)
(a) I ori...
Rails 4: how to use $(document).ready() with turbo-links
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Please note that Rails 4 is now defaulting to Turbolinks 5 which, in turn, is not supported by jquery.turbolinks! See github.com/kossnocorp/jquery.turbolinks/issues/56
– sebastian
Jul 5 '16 at 12:08
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How do I hide .class files from the Open Resource dialog in Eclipse?
...the Derived checkbox (leave it UNCHECKED) and click OK
.class files will now be hidden in future.
Source: http://ayubmalik.co.uk/2011/12/hide-class-files-when-opening-a-type-or-resource-in-eclipse-ide/
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Difference between “git add -A” and “git add .”
... -A ..
git add <path> is the same as "git add -A <path>" now, so that
"git add dir/" will notice paths you removed from the directory and
record the removal.
In older versions of Git, "git add <path>" ignored removals.
You can say "git add --ignore-removal <pa...
How to fix Git error: object file is empty?
...- a/tex/MCMC-in-IRT.tex
+++ b/tex/MCMC-in-IRT.tex
It worked!
Step 8: So now we need to point HEAD to 9f0abf890b113a287e10d56b66dbab66adc1662d.
nathanvan@nathanvan-N61Jq:~/workspace/mcmc-chapter$ git update-ref HEAD 9f0abf890b113a287e10d56b66dbab66adc1662d
Which didn't complain.
Step 9: See w...
iOS 7: UITableView shows under status bar
... and drag both the dataSource and the delegate to your ViewController.
Now for the part of not clipping into the status bar.
Grab the top edge of your Table View and move it down to one of the dashed blue auto-layout guides that are near the top
Now, you can control drag from the Table Vi...
Can I create more than one repository for github pages?
...using custom domain names.
(since April 2013, all username.github.com are now username.github.io)
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git-diff to ignore ^M
...inst older revisions of these files. Converting line endings starting from now on does not solve the problem with older revisions :-/
– neoneye
Dec 11 '09 at 18:14
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What is the difference between Gemfile and Gemfile.lock in Ruby on Rails
... say: "I want nokogiri as long as it’s greater than version 1.4.4", etc. Now suppose that I have set up my Gemfile 8 months ago and I successful setup my app with this requirement. 8 months ago nokogiri version was 1.4.4. My rails apps was running perfectly without any problems with this version.
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How do I exit the Vim editor?
...MAND mode, where you can type short, few character commands, blindly. You know what you are doing; this isn't for amateurs.
When you want to actually edit text, you should go to INSERT mode with some one-character command:
i: go to INSERT in the place of the cursor
I: go to INSERT mode at the beg...