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The following sections have been defined but have not been rendered for the layout page “~/Views/Sha
... _Layout.cshtml has something like this:
@RenderSection("scripts")
Then all Views that use that Layout must include a @section with the same name (even if the contents of the section are empty):
@{
ViewBag.Title = "Title";
Layout = "~/Views/Shared/_Layout.cshtml";
}
@section scripts{
...
Test if a variable is set in bash when using “set -o nounset”
...echo "yo"
fi
echo "whatever"
In this case, VALUE ends up being an empty string if WHATEVER is not set. We're using the {parameter:-word} expansion, which you can look up in man bash under "Parameter Expansion".
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Multiple constructors in python? [duplicate]
... Now you can do:
c = C(fd)
# or:
c = C.fromfilename('a filename')
Notice all those classmethods still go through the same __init__, but using classmethods can be much more convenient than having to remember what combinations of keyword arguments to __init__ work.
isinstance is best avoided becaus...
How do I use floating-point division in bash?
...e result is the maximum scale of the expressions involved. And there is an extra note for / operator: The scale of the result is the value of the variable scale.
– psmith
Jan 16 '17 at 5:48
...
Understanding Canvas and Surface concepts
...it is implemented but I'd imagine it is a some kind of Bitmap wrapper with extra methods for things that are directly related to screen displays (That is the reason for a surface, a Bitmap is too generic). You can get a Canvas from your Surface which is really getting the Canvas associated with the ...
When is it appropriate to use UDP instead of TCP? [closed]
...l data amount transmitted was about the same for both IP and TCP. We have extra overhead with the UDP communications because we have some of the same stuff that you get for "free" with TCP/IP (checksums, sequence numbers, etc.). For example, Wireshark showed that a request for the next set of reco...
How to use timeit module
...
The way timeit works is to run setup code once and then make repeated calls to a series of statements. So, if you want to test sorting, some care is required so that one pass at an in-place sort doesn't affect the next pass with already sorted data (that, of course, would make the Timsort reall...
Node.js check if file exists
...ecause fs.exists(path, callback) now is deprecated
Another good way is fs-extra
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Detecting when user scrolls to bottom of div with jQuery
... alert('end reached');
}
})
});
You may also add some extra margin pixels if you do not need a strict condition
var margin = 4
jQuery(function($) {
$('#flux').on('scroll', function() {
if(Math.round($(this).scrollTop() + $(this).innerHeight(), 10) >= Math.round(...
How to change Rails 3 server default port in develoment?
...
First - do not edit anything in your gem path! It will influence all projects, and you will have a lot problems later...
In your project edit script/rails this way:
#!/usr/bin/env ruby
# This command will automatically be run when you run "rails" with Rails 3 gems installed from the root...