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Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Git Bash is extremely slow on Windows 7 x64
... it is significantly faster on my machine, from ~0.75 s to 0.1 s.
This is based on this blog post.
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jquery save json data object in cookie
...lead to a bug in some browsers.
Before using it, you should convert it to base64 (using btoa), and when reading it, convert from base64 (using atob).
val = JSON.stringify(userData)
val = btoa(val)
write_cookie(val)
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Groovy Shell warning “Could not open/create prefs root node …”
...f done under HKEY_CURRENT_USER. A better question, why on earth is a Java-based product tying itself to the Windows Registry?
– avgvstvs
Dec 23 '14 at 18:41
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Print a string as hex bytes?
...II characters. If your input might contain things like emojis or non-Latin based writting systems, you might want to use ":".join("{:04x}".format(ord(c)) for c in s) (replacing 02x with 04x to zero-pad each number to be 4 digits) instead
– Boris
Nov 11 '19 at 2...
Detect if Visual C++ Redistributable for Visual Studio 2012 is installed
...eg locations may be OS-dependent. I collected this info from a Windows 10 x64 box. I'm just going to go ahead and dump all of these redist versions and the reg keys I search for to detect installation.:
Visual C++ 2005
Microsoft Visual C++ 2005 Redistributable (x64)
Registry Key: HKLM\SOFTWARE\C...
What is the difference between NULL, '\0' and 0?
...means the value of the pointer is 0, independent of whether it is 32bit or 64bit (one case 4 bytes the other 8 bytes of zeroes).
string context - the character representing the digit zero has a hex value of 0x30, whereas the NUL character has hex value of 0x00 (used for terminating strings).
These...
How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the oth
...y();
echo $rsa->getPublicKey(CRYPT_RSA_PUBLIC_FORMAT_PKCS1_RAW);
The base64-encoded stuff appears to match even though the header says BEGIN PUBLIC KEY and not BEGIN RSA PUBLIC KEY. So maybe just use str_replace to fix that and you should be good to go!
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How do I make a request using HTTP basic authentication with PHP curl?
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CURLOPT_USERPWD basically sends the base64 of the user:password string with http header like below:
Authorization: Basic dXNlcjpwYXNzd29yZA==
So apart from the CURLOPT_USERPWD you can also use the HTTP-Request header option as well like below with other head...
Apply pandas function to column to create multiple new columns?
...me column or series you have to create a dataframe of multiple new columns based on a transformation on the original column/series. The transformation function often returns k-tuples, and these k-tuples must be separated into k columns, based on some order. @Ben's answer clearly does this very neatl...