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Using bitwise OR 0 to floor a number
...o 32bit signed scope.
To summarize:
Bitwise works the same if you work from 0 to 2147483647.
Bitwise is 1 number off if you work from -2147483647 to 0.
Bitwise is completely different for numbers less than -2147483648 and greater than 2147483647.
If you really want to tweak performance and use...
Convert special characters to HTML in Javascript
... escaping HTML is also used by the Prototype JS library though differently from the simplistic sample I have given.
Note: You will still need to escape quotes (double and single) yourself. You can use any of the methods outlined by others here.
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Functions that return a function
...();, but instead of assigning the return value of b() you are returning it from the calling function a(). If the function b() itself does not return a value, the call returns undefined after whatever other work is done by b().
// Execute function b() and return its value
return b();
// If b() has ...
Upload files with HTTPWebrequest (multipart/form-data)
...DATE: Using .NET 4.5 (or .NET 4.0 by adding the Microsoft.Net.Http package from NuGet) this is possible without external code, extensions, and "low level" HTTP manipulation. Here is an example:
// Perform the equivalent of posting a form with a filename and two files, in HTML:
// <form action="{...
mkdir's “-p” option
... directory.
d (delete)
Allows one to remove files and sub-directories from a directory.
a (administer)
Allows one to change a directory's ACL. The owner of a directory can always change the ACL of a directory that s/he owns, along with the ACLs of any subdirectories in that directory.
Fi...
Push to GitHub without a password using ssh-key
...sitory's remote end to an http URL by default. I just created a repository from scratch, and I was presented with an option for setting an https remote URL, not a git one.
– Preslav Rachev
Jan 5 '17 at 11:38
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Can an ASP.NET MVC controller return an Image?
...ass a file name (path) like this means they could potentially access files from anywhere on the server. Might want to warn people not to use it as-is.
– Ian Mercer
Jan 28 '11 at 7:53
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Golang: How to pad a number with zeros when printing?
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Use the Printf function from the fmt package with a width of 6 and the padding character 0:
import "fmt"
fmt.Printf("%06d", 12) // Prints to stdout '000012'
Setting the width works by putting an integer directly preceeding the format specifier ('...
How do I remove code duplication between similar const and non-const member functions?
...using const_cast instead of static_cast to add const since it prevents you from changing the type accidentally.
– Greg Rogers
Nov 23 '08 at 7:49
7
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How can Perl's print add a newline by default?
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The real danger comes from the fact that all code will now add newlines, even code in other people's modules that weren't expecting it. Imagine networking code that would have sent the message "helo\r\n" that now sends "helo\r\n\n".
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