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Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
... a matrix of size 2^n is slower than transposing one of size 2^n+1 . For small values of n , the difference is not major.
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How to update a pull request from forked repo?
...to that forked repo. I then opened a pull request. The pull request listed all the changes I wanted.
5 Answers
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Regular expression to match DNS hostname or IP Address?
...o be escaped with \.
ValidHostnameRegex is valid as per RFC 1123. Originally, RFC 952 specified that hostname segments could not start with a digit.
http://en.wikipedia.org/wiki/Hostname
The original specification of
hostnames in RFC
952,
mandated that labels could not start
with a d...
Save PL/pgSQL output from PostgreSQL to a CSV file
...e to your local PC. It also needs to be run as a Postgres "superuser" (normally called "root") because Postgres can't stop it doing nasty things with that machine's local filesystem.
That doesn't actually mean you have to be connected as a superuser (automating that would be a security risk of a di...
HTML5 dragleave fired when hovering a child element
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This worked for me in all browsers, but Firefox. I have a new solution which works everywhere in my case. On the first dragenter I save event.currentTarget in a new variable dragEnterTarget. As long as dragEnterTarget is set, I ignore further drag...
Can't ignore UserInterfaceState.xcuserstate
...ked"
Alternatively you can use the -a option to git commit that will add all files that have been modified or deleted.
Once you've removed the file from git, it will respect your .gitignore.
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How to initialize an array in Java?
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Actually, the primary reason it is incorrect is that it is a syntax error! The AIOB would only happen if the syntax was acceptable.
– Stephen C
Dec 21 '09 at 4:07
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Google Maps JS API v3 - Simple Multiple Marker Example
...a that I want to cycle through and plot on a map. Seems fairly simple, but all the multi-marker tutorials I have found are quite complex.
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How to update column with null value
...ed Oct 6 '10 at 8:11
Daniel VassalloDaniel Vassallo
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Writing to output window of Visual Studio
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Just ran a small app here, works fine for me. Perhaps there is a small glitch in your environment?
– Bhargav Bhat
Feb 27 '12 at 15:41
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