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How do I negate a test with regular expressions in a bash script?
...ersion 4.0.35(1)-release (x86_64-suse-linux-gnu), I would like to negate a test with Regular Expressions. For example, I would like to conditionally add a path to the PATH variable, if the path is not already there, as in:
...
An “and” operator for an “if” statement in Bash
...al is true if the job's return value is 0 or false otherwise).
For trivial tests, there is the test program (man test).
As some find lines like if test -f filename; then foo bar; fi, etc. annoying, on most systems you find a program called [ which is in fact only a symlink to the test program. When ...
str.startswith with a list of strings to test for
...
str.startswith allows you to supply a tuple of strings to test for:
if link.lower().startswith(("js", "catalog", "script", "katalog")):
From the docs:
str.startswith(prefix[, start[, end]])
Return True if string starts with the prefix, otherwise return False. prefix can ...
Should try…catch go inside or outside a loop?
...ich way the performance would be affected, I guess were back to try-it-and-test (as always).
– Jeffrey L Whitledge
Sep 27 '08 at 18:35
1
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What's the difference between jQuery's replaceWith() and html()?
...two ways of using html() and replaceWith() Jquery functions.
<div id="test_id">
<p>My Content</p>
</div>
1.) html() vs replaceWith()
var html = $('#test_id p').html(); will return the "My Content"
But the
var replaceWith = $('#test_id p').replaceWith(); will return ...
How do you deal with configuration files in source control?
...sions of the config files for each environment (web.config.dev, web.config.test, web.config.prod). Our deployment scripts copy out the correct version, renaming it to web.config. This way, we have full version control on the config files for each environment, can easily perform a diff, etc.
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How to study design patterns? [closed]
...toring. I believe the right order to learn about patterns is this:
Learn Test Driven Development (TDD)
Learn refactoring
Learn patterns
Most people ignore 1, many believe they can do 2, and almost everybody goes straight for 3.
For me the key to improve my software skills was learning TDD. It m...
Regex empty string or email
...
This will match the following email test.test@test. This one is better I think ^$|^[^\s@]+@[^\s@]+\.[^\s@]+$ as it will accept emails like test@test.se
– dont_trust_me
Dec 1 '17 at 9:39
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Case-insensitive search
...earches beyond the first result. You need to stop after first match which .test or .search do. Check performance here.
– Rami
Mar 28 '16 at 22:15
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Why do we use __init__ in Python classes?
...ill be a MyInteger), but we'll ignore now. In real code, we wouldn't; we'd test it to make sure, and maybe even coerce it ("you're not an integer? by golly, you have 10 nanoseconds to become one! 9... 8....")
We could even define fractions. Fractions also know how to add themselves.
class MyFracti...