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Checking for NULL pointer in C/C++ [closed]
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In my experience, tests of the form if (ptr) or if (!ptr) are preferred. They do not depend on the definition of the symbol NULL. They do not expose the opportunity for the accidental assignment. And they are clear and succinct....
AngularJS performs an OPTIONS HTTP request for a cross-origin resource
...mmunicate with a cross-origin resource where the asset host which delivers my template files is on a different domain and therefore the XHR request that angular performs must be cross-domain. I've added the appropriate CORS header to my server for the HTTP request to make this work, but it doesn't s...
What's the fastest way to delete a large folder in Windows?
...found a combo of del+rmdir nearly three times faster than plain rmdir. See my answer: stackoverflow.com/questions/186737/…
– Hugo
Jun 1 '11 at 21:50
2
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What's the best visual merge tool for Git? [closed]
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Beyond Compare 3, my favorite, has a merge functionality in the Pro edition. The good thing with its merge is that it let you see all 4 views: base, left, right, and merged result. It's somewhat less visual than P4V but way more than WinDiff. ...
How do you check if a JavaScript Object is a DOM Object?
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It's part of the DOM, Level2.
Update 2: This is how I implemented it in my own library:
(the previous code didn't work in Chrome, because Node and HTMLElement are functions instead of the expected object. This code is tested in FF3, IE7, Chrome 1 and Opera 9).
//Returns true if it is a DOM node
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How to insert in XSLT
... Using the accepted answer I ended up with a line breaking space in my XML output (at least that's what it looked like in VS2010's XML editor). Using this answer I get exactly 1 space only.
– Mathijs Flietstra
Jan 14 '14 at 15:00
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Debugging sqlite database on the device
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I'll repeat myself from another answer:
Starting from API level 8 (Android 2.2), if you build the application as debuggable, you can use the shell run-as command to run a command or executable as a specific user/application or just s...
Best practices for exception management in Java or C# [closed]
I'm stuck deciding how to handle exceptions in my application.
15 Answers
15
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IEnumerable to string [duplicate]
...h (var c in charSequence)
{
sb.Append(c);
}
return sb.ToString();
In my testing, that is detailed in the linked question, for 1000000 iterations of "Some reasonably small test data" I get results like this,
1000000 iterations of "Concat" took 1597ms.
1000000 iterations of "new string" took 86...
Split a vector into chunks in R
...60 0.300 5.663
EDIT: Changing from as.factor() to as.character() in my function made it twice as fast.
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