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How does a language expand itself? [closed]
...er may use some of the inner layers functionality.
In the case of e.g. Windows the operating system exposes the so-called WIN32 API for applications running on Windows. The Qt library uses that API to provide applications using Qt to its own API. You use Qt, Qt uses WIN32, WIN32 uses lower levels o...
What is the difference between sed and awk? [closed]
.... It has much more robust programming constructs including if/else, while, do/while and for (C-style and array iteration). There is complete support for variables and single-dimension associative arrays plus (IMO) kludgey multi-dimension arrays. Mathematical operations resemble those in C. It has pr...
write a shell script to ssh to a remote machine and execute commands
...h will execute the same set of commands in each machine. (Including some sudo operations). How can this be done using shell scripting?
You can do this with ssh, for example:
#!/bin/bash
USERNAME=someUser
HOSTS="host1 host2 host3"
SCRIPT="pwd; ls"
for HOSTNAME in ${HOSTS} ; do
ssh -l ${USERNAM...
Django Passing Custom Form Parameters to Formset
...request.affiliate)), extra=3)
I think this is the cleanest approach, and doesn't affect ServiceForm in any way (i.e. by making it difficult to subclass).
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How do I add a bullet symbol in TextView?
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Copy paste: •. I've done it with other weird characters, such as ◄ and ►.
Edit: here's an example. The two Buttons at the bottom have android:text="◄" and "►".
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Is there a way to get the git root directory in one command?
... I always define git config --global alias.exec '!exec ' so I can do things like git exec make. This works because shell aliases are always executed in the top-level directory.
– Daniel Brockman
Nov 1 '11 at 19:09
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What's the best way to do “application settings” in Android? [closed]
...shared preferences can be used by other application components. But if you do not need to share the preferences with other components and want to have activities private preferences. You can do that with the help of getPreferences() method of the activity. The getPreference method uses the getShared...
Best way to store JSON in an HTML attribute?
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The HTML does not have to validate.
Why not? Validation is really easy QA that catches lots of mistakes. Use an HTML 5 data-* attribute.
The JSON object could be any size (i.e. huge).
I've not seen any documentation on browser...
How do I size a UITextView to its content?
...is no longer works on iOS 7 or above
There is actually a very easy way to do resizing of the UITextView to its correct height of the content. It can be done using the UITextView contentSize.
CGRect frame = _textView.frame;
frame.size.height = _textView.contentSize.height;
_textView.frame = frame;...
How to Test a Concern in Rails
...Additionally if you're trying to test model concerns, you won't be able to do things like test the validity of objects or invoke ActiveRecord callbacks unless you set up the database accordingly (because your dummy class won't have a database table backing it). Moreover, you'll want to not only test...