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When is null or undefined used in JavaScript? [duplicate]
...t. So you can just do this: var undefined = "Magic!"; // Yes this works Now your code may or may not work. It is better to do a typeof(x) !== "undefined"
– ProVega
Apr 17 '14 at 21:29
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Using cURL with a username and password?
...equires a username/password. I'd like to try accessing it with curl. Right now I'm doing something like:
17 Answers
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event.preventDefault() vs. return false
...rning false from an event handler wasn't specced as doing anything at all. Now, maybe that's an incorrect interpretation of the (hard to understand) spec, or maybe despite it not being specced literally all the browsers interpreted return false the same as event.preventDefault(). But I dunno; it's e...
What is the difference between a web API and a web service?
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Not "absolutely the same" if there are restrictions now are they?
– Ojonugwa Jude Ochalifu
Feb 6 '18 at 15:53
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minimize app to system tray
... disable the NotifyIcon object by setting its
Visible property to false. Now, you want the window to reappear when
you double click on the NotifyIcon object in the taskbar. For this,
handle the NotifyIcon’s MouseDoubleClick event. Here, you show the
form using the Show() method.
private ...
What's the best way to generate a UML diagram from Python source code? [closed]
...ve heard of Pylint that helps statically checking Python code. Few people know that it comes with a tool named Pyreverse that draws UML diagrams from the python code it reads. Pyreverse uses graphviz as a backend.
It is used like this:
pyreverse -o png -p yourpackage .
where the . can also be a sin...
Rename an environment with virtualenvwrapper
... command below.
$ sed -i "s/doors/django/g" ~/.virtualenvs/django/bin/*
now if you do:
$ workon django
(django)hobbes3@hobbes3
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C++ multiline string literal
...#include ing a file? I can't think of one, but boy, that would be nice. I know it'll be in C++0x.
10 Answers
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Determining whether jQuery has not found any element
...t(0) !== undefined
$('#my_selector')[0] !== undefined
This is the basic, now do whatever you want.
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How to export/import PuTTy sessions list?
... messing with the registry like this is a Bad Idea™, and I don't really know what I'm doing. Use the below scripts at your own risk, and be prepared to have your IT department re-image your machine and ask you uncomfortable questions about what you were doing.
On the source machine:
.\export.ps...