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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...
Ruby: How to post a file via HTTP as multipart/form-data?
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I take that back, file uploads now work. Problem I'm having now is the server gives a 302 and the rest-client follows the RFC (which no browser does) and throws an exception (since browsers are supposed to warn about this behavior). THe other alternative i...
How to exit from PostgreSQL command line utility: psql
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As of PostgreSQL 11 you can now type "quit" or "exit".
– aorth
Oct 19 '18 at 8:23
1
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CSS way to horizontally align table
I want to show a table of fixed width at the center of browser window. Now I use
10 Answers
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Understanding recursion [closed]
...value of its left child, if any, and the value of its right child, if any. Now recall that the children, if they're not null, are also nodes.
So to sum the left child, we would add the value of child node itself to the value of its left child, if any, and the value of its right child, if any.
So ...
use Winmerge inside of Git to file diff
...mple git config diff.tool winmerge will be enough.
Git 2.5+ (Q2, 2015) is now aware of Winmerge as a diff or merge tool!
Original answer (2009-2012)
(msysgit, 1.6.5, DOS session)
The first part (using winmerge) is described in "How do I view ‘git diff’ output with visual diff program?"
C:...
SVN: Folder already under version control but not comitting?
...y. Remember to delete all .svn hidden directories from the copied folder.
Now update your project, clean-up and commit what has left. Now move your folder back to working directory, add it and commit. Most of the time this workaround works, it seems that basically SVN got confused...
Update: quoti...
What do people think of the fossil DVCS? [closed]
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After having used Fossil for more than a year now on non-trivial development projects, I feel confident enough to wage in on this topic.
Below's my experience so far. I'm comparing against git and svn at times, simply because I know those SCM's very well and comparing m...
glVertexAttribPointer clarification
...fore you render, you need to enable it with glEnableVertexAttribArray(0);.
Now that an attribute is enabled, you need to define the data it's going to use. In order to do so you need to bind your VBO - glBindBuffer(GL_ARRAY_BUFFER, myBuffer);.
And now we can define the attribute - glVertexAttribPoin...
How exactly do Django content types work?
...d you can do better. High five!
Enter the Content Types framework!
Well, now we're going to take a close look at our models and rework them to be more "reusable" and intuitive. Let's start by getting rid of the two foreign keys on our Comment model and replace them with a GenericForeignKey.
# ou...