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Applying a function to every row of a table using dplyr?
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stackoverflow.com/questions/28807266/… just found the answer. In this they are using correlation instead of sum. But same concept.
– Arun Raja
May 4 '15 at 10:07
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Should I use a data.frame or a matrix?
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Part of the answer is contained already in your question: You use data frames if columns (variables) can be expected to be of different types (numeric/character/logical etc.). Matrices are for data of the same type.
Consequently, the choice matrix/data.frame is only prob...
What are the best PHP input sanitizing functions?
...be encoded.
Second, you can try removing any possible HTML. strip_tags is quick and easy, but also sloppy. HTML Purifier does a much more thorough job of both stripping out all HTML and also allowing a selective whitelist of tags and attributes through.
Modern PHP versions ship with the filter ext...
Stack smashing detected
... mov %rax,%rdi
4005b6: e8 8b ff ff ff callq 400546 <myfunc>
return 0;
4005bb: b8 00 00 00 00 mov $0x0,%eax
}
# Check that the canary at -0x8(%rbp) hasn't changed after calling myfunc.
# If it has, jump to the failure point __sta...
What is the “FS”/“GS” register intended for?
...nd GS for efficient access of thread_local data is a happy unintended consequence of an historical error.
– Richard Hodges
Jan 4 '18 at 12:41
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What is the difference between server side cookie and client side cookie?
...n on the browser.
Say you have a website (example.com), when the browser requests a webpage the website can send cookies to store information on the browser.
Browser request example:
GET /index.html HTTP/1.1
Host: www.example.com
Example answer from the server:
HTTP/1.1 200 OK
Content-type: tex...
Fastest hash for non-cryptographic uses?
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Wow, only required datatype is an unsigned integer, this will be SIGNIFICANLY faster than other hashing.
– John
Sep 8 '10 at 7:31
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When should I use OWIN Katana?
...ly don't get why I should use OWIN, while I can use IIS . To simplify, my question is: What do I lose if I skip learning OWIN and use IIS for my websites?
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How does a public key verify a signature?
...is a hash (SHA1, MD5, etc.) of the data (file, message, etc.) that is subsequently encrypted with the signer's private key. Since that is something only the signer has (or should have) that is where the trust comes from. EVERYONE has (or should have) access to the signer's public key.
So, to v...
Timer function to provide time in nano seconds using C++
..._REALTIME, &ts); // Works on Linux
}
For windows you want to use the QueryPerformanceCounter. And here is more on QPC
Apparently there is a known issue with QPC on some chipsets, so you may want to make sure you do not have those chipset. Additionally some dual core AMDs may also cause a prob...