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List comprehension in Ruby
... % 2 == 0 ? x * 3 : nil}.compact
Slightly cleaner, at least to my taste, and according to a quick benchmark test about 15% faster than your version...
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Does Python have an ordered set?
...s referred to from the Python 2 Documentation. This runs on Py2.6 or later and 3.0 or later without any modifications. The interface is almost exactly the same as a normal set, except that initialisation should be done with a list.
OrderedSet([1, 2, 3])
This is a MutableSet, so the signature for ...
Accessing last x characters of a string in Bash
...of string:
${string: -3}
or
${string:(-3)}
(mind the space between : and -3 in the first form).
Please refer to the Shell Parameter Expansion in the reference manual:
${parameter:offset}
${parameter:offset:length}
Expands to up to length characters of parameter starting at the character
spe...
How to delete a specific line in a file?
...
First, open the file and get all your lines from the file. Then reopen the file in write mode and write your lines back, except for the line you want to delete:
with open("yourfile.txt", "r") as f:
lines = f.readlines()
with open("yourfile.t...
RegEx match open tags except XHTML self-contained tags
... tool that can be used to correctly parse HTML. As I have answered in HTML-and-regex questions here so many times before, the use of regex will not allow you to consume HTML. Regular expressions are a tool that is insufficiently sophisticated to understand the constructs employed by HTML. HTML is no...
How to assert two list contain the same elements in Python? [duplicate]
...h does exactly what you are looking for, as you can read from the python standard library documentation. The method is somewhat misleadingly named but it does exactly what you are looking for.
a and b have the same elements in the same number, regardless of their order
Here a simple example wh...
Wrapping chained method calls on a separate line in Eclipse for Java
...on column
It should give you the exact behavior you asked for.
BONUS: Android Studio / IntelliJ Idea:
Mac OS: Android Studio → Preferences (Cmd +,) → Editor → Code Style → Java → Wrapping And Braces tab → Chained method calls
select
Wrap always
and check
Align when m...
Why use Object.prototype.hasOwnProperty.call(myObj, prop) instead of myObj.hasOwnProperty(prop)?
If I understand correctly, each and every object in Javascript inherits from the Object prototype, which means that each and every object in Javascript has access to the hasOwnProperty function through its prototype chain.
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How to capture stdout output from a Python function call?
...ed usage:
What may not be obvious is that this can be done more than once and the results concatenated:
with Capturing() as output:
print('hello world')
print('displays on screen')
with Capturing(output) as output: # note the constructor argument
print('hello world2')
print('done')
pri...
Can you call Directory.GetFiles() with multiple filters?
...s() method to retrieve a list of files of multiple types, such as mp3 's and jpg 's. I have tried both of the following with no luck:
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