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Ruby: kind_of? vs. instance_of? vs. is_a?
...ver. Use polymorphism instead.
Why are there so many of them?
I wouldn't call two "many". There are two of them, because they do two different things.
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Purpose of #!/usr/bin/python3
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That's called a hash-bang. If you run the script from the shell, it will inspect the first line to figure out what program should be started to interpret the script.
A non Unix based OS will use its own rules for figuring out how t...
How to create standard Borderless buttons (like in the design guideline mentioned)?
I was just checking the design guidelines and wondering about the borderless buttons.
I goggled and tried to find in the source but can't bring it together by myself.
Is this the normal Button widget but you add a custom (Android default) style?
How to make these borderless buttons (of course you ca...
Remove .php extension with .htaccess
...or the directory 'foobar':
example.com/foobar
from a request for a file called foobar (which is actually foobar.php)
example.com/foobar
It might be possible if you used the RewriteBase directive. But if you do that then this problem gets way more complicated as you're going to require RewriteC...
GCD to perform task in main thread
I have a callback which might come from any thread. When I get this callback, then I would like to perform a certain task on the main thread.
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How to get response status code from jQuery.ajax?
... all I am trying to do is to get the HTTP response code from a jQuery.ajax call. Then, if the code is 301 (Moved Permanently), display the 'Location' response header:
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Pandas dataframe get first row of each group
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>>> df.groupby('id').first()
value
id
1 first
2 first
3 first
4 second
5 first
6 first
7 fourth
If you need id as column:
>>> df.groupby('id').first().reset_index()
id value
0 1 first
1 ...
Mismatch Detected for 'RuntimeLibrary'
...aving the same idea about the size of objects on either side of a function call.
Consider for example that the above two pieces of code are called A and B. A is compiled against one version of the standard library, and B against another. In A's view, some random object that a standard function retu...
Adding parameter to ng-click function inside ng-repeat doesn't seem to work
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Instead of
<button ng-click="removeTask({{task.id}})">remove</button>
do this:
<button ng-click="removeTask(task.id)">remove</button>
Please see this fiddle:
http://jsfiddle.net/JSWorld/Hp4W7/34/
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Alternate output format for psql
...on Ubuntu. I have a table with columns c1 through cN . The columns are wide enough that selecting all columns causes a row of query results to wrap multiple times. Consequently, the output is hard to read.
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