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How to implement Enums in Ruby?
...Ruby's expressive power. To avoid problems, most Ruby programmers practice test-driven design, which will find not just typos but also logic errors.
– emk
Aug 20 '09 at 20:14
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Is there an alternative to bastard injection? (AKA poor man's injection via default constructor)
...ad of a config file? What if you want to vary configuration values in unit tests? What if you want to make the configuration value configurable via the UI? ...FWIW, I've expanded on the DI friendly library recommendations here, including more code examples.
– Mark Seemann
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One-liner to check whether an iterator yields at least one element?
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This seems to work for me, with a re.finditer. You can test that any stops at first success easily: run any((x > 100 for x in xrange(10000000))) and then run any((x > 10000000 for x in xrange(100000000))) -- the second should take much longer.
– chbrow...
What is the proper way to comment functions in Python?
...hers have already written.
You can even go one step further and add a doctest to your docstring, making automated testing of your functions a snap.
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How to make the 'cut' command treat same sequental delimiters as one?
... all the possible combinations for future readers. Explanations are at the Test section.
tr | cut
tr -s ' ' < file | cut -d' ' -f4
awk
awk '{print $4}' file
bash
while read -r _ _ _ myfield _
do
echo "forth field: $myfield"
done < file
sed
sed -r 's/^([^ ]*[ ]*){3}([^ ]*).*/\2/' ...
How to clone all remote branches in Git?
...qq(git branch --track $2 $1/$2\n)} else {$d{$_}=1}' | csh -xfs
As usual: test in your setup before copying rm -rf universe as we know it
Credits for one-liner go to user cfi
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Why does += behave unexpectedly on lists?
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Done some testings, Scott Griffiths got it right, so -1 for you.
– e-satis
Feb 27 '10 at 17:55
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What is the Python equivalent of static variables inside a function?
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Many people have already suggested testing 'hasattr', but there's a simpler answer:
def func():
func.counter = getattr(func, 'counter', 0) + 1
No try/except, no testing hasattr, just getattr with a default.
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Count how many files in directory PHP
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Since I needed this too, I was curious as to which alternative was the fastest.
I found that -- if all you want is a file count -- Baba's solution is a lot faster than the others. I was quite surprised.
Try it out for yourself:
<?php
define('MYDIR', '...');
foreach (array(1, 2, 3) as $i)
{
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Count the number occurrences of a character in a string
...ng, I would use a regular expression or the str.count() method. I haven't tested, but there may be a performance difference due to a slight overhead in counting all characters and appending to a dictionary rather than counting occurrences of a single substring. I would suggest writing a script to ...