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What is the meaning of prepended double colon “::”?
...space you're currently in. For instance, if you had two different classes called Configuration as such:
class Configuration; // class 1, in global namespace
namespace MyApp
{
class Configuration; // class 2, different from class 1
function blah()
{
// resolves to MyApp::Configur...
`levels
...a functional language and does not like to mutate its objects. But it does allow assignment statements, using replacement functions:
levels(x) <- y
is equivalent to
x <- `levels<-`(x, y)
The trick is, this rewriting is done by <-; it is not done by levels<-. levels<- is just ...
Why doesn't .NET/C# optimize for tail-call recursion?
...n was responsible for the machine code.
The CLR itself does support tail call optimization, but the language-specific compiler must know how to generate the relevant opcode and the JIT must be willing to respect it.
F#'s fsc will generate the relevant opcodes (though for a simple recursion it may j...
Check if inputs are empty using jQuery
I have a form that I would like all fields to be filled in. If a field is clicked into and then not filled out, I would like to display a red background.
...
How to read a local text file?
...
You need to check for status 0 (as when loading files locally with XMLHttpRequest, you don't get a status returned because it's not from a Webserver)
function readTextFile(file)
{
var rawFile = new XMLHttpRequest();
rawFile.open("GET", file, false);
rawFile.onreadystat...
How to estimate a programming task if you have no experience in it [closed]
...st answer you can give is to ask for time to knock up a quick prototype to allow you to give a more accurate estimate. Without some experience with a tool or a problem, any estimate you give is essentially meaningless.
As an aside, there is very rarely a problem with giving too long an estimate. Un...
What is the difference between and ?
...is a thematic grouping of content. Each section should be identified, typically by including a heading (h1-h6 element) as a child of the <section> element.
Examples of sections would be chapters, the various tabbed pages in a tabbed dialog box, or the numbered sections of a thesis. A Web site...
How do I force Sublime Text to indent two spaces per tab?
...
If you want it for all files, go to Preferences -> Settings - Default/User. But as several comments below indicate, Syntax Specific settings can limit it to just the languages you choose.
To limit this configuration to Ruby files, first o...
127 Return code from $?
...ommand, because it doesn't know where to find the binary you're trying to call.
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Django - what is the difference between render(), render_to_response() and direct_to_template()?
...and spanking new shortcut for render_to_response in 1.3 that will automatically use RequestContext that I will most definitely be using from now on.
2020 EDIT: It should be noted that render_to_response() was removed in Django 3.0
https://docs.djangoproject.com/en/1.8/topics/http/shortcuts/#rend...