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Ruby off the rails
... the huge benefits of Ruby is the ability to create DSLs very easily. Ruby allows you to create "business rules" in a natural language way that is usually easy enough for a business analyst to use. Many Ruby apps outside of web development exist for this purpose.
I highly recommend Googling "ruby ...
Why doesn't Dijkstra's algorithm work for negative weight edges?
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Recall that in Dijkstra's algorithm, once a vertex is marked as "closed" (and out of the open set) - the algorithm found the shortest path to it, and will never have to develop this node again - it assumes the path developed to ...
Regular Expressions and negating a whole character group [duplicate]
... in Peter's answer. I've run some tests since then, and found that it's really slightly faster. However, the reason to prefer this technique over the other is not speed, but simplicity.
The other technique, described here as a tempered greedy token, is suitable for more complex problems, like m...
Media query to detect if device is touchscreen
...devices, you can simple use:
if(window.TouchEvent) {
//.....
}
Especially for Ipad:
if(window.Touch) {
//....
}
But, these do not work on Android.
Modernizr gives feature detection abilities, and detecting features is
a good way to code, rather than coding on basis of browsers.
...
“Parser Error Message: Could not load type” in Global.asax
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Your local web server is running different code than what you're actually working on. Ensure you have stopped debugging, stop your local web server, clean and rebuild as Peter suggested, double-check your global.asax and global.asax.cs, and try again.
If this doesn't work and you are using lo...
Why does auto a=1; compile in C?
...unction, it's also the same as int a in this example.
This keyword is actually a leftover from C's predecessor B, where there were no base types: everything was int, pointer to int, array of int.(*) Declarations would be either auto or extrn [sic]. C inherited the "everything is int" as a default r...
git push to specific branch
...I'm a bit confused, I'm using v2.10, when I type git push it tries to push all tracked branches, contrary to what you said ("the remote of the current branch is the default value").
– Roberto
Feb 22 '17 at 0:00
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How to delete a whole folder and content?
...delete the DCIM folder because it is a system folder. As you delete it manually on phone it will delete the contents of that folder, but not the DCIM folder. You can delete its contents by using the method below:
Updated as per comments
File dir = new File(Environment.getExternalStorageDirectory()...
How to clone git repository with specific revision/changeset?
How can I clone git repository with specific revision, something like I usually do in Mercurial:
15 Answers
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Can someone explain this 'double negative' trick? [duplicate]
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@Grinn : user113716 did not list all. He forgot -0 . I do not mean a unary minus with a zero, but the result of that which is a seperate value. You can create it, for instance, by assigning -0 to a variable.
– Marco de Wit
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