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Validating IPv4 addresses with regexp
....1.255.1
127.1
192.168.1.256
-1.2.3.4
1.1.1.1.
3...3
Try online with unit tests: https://www.debuggex.com/r/-EDZOqxTxhiTncN6/1
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Search and replace a line in a file in Python
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The shortest way would probably be to use the fileinput module. For example, the following adds line numbers to a file, in-place:
import fileinput
for line in fileinput.input("test.txt", inplace=True):
print('{} {}'.format(file...
StringIO in Python3
...ule StringIO is gone and from io import BytesIO should be applied instead. Tested myself on python 3.5 @ eclipse pyDev + win7 x64. Please let me know if I were wrong thanks.
– Bill Huang
Mar 5 '16 at 17:16
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NPM modules won't install globally without sudo
... in ~/bin, some node packages (or their dependant packages) have only been tested as installing with sudo so be aware that you may be encounter an untested "installation environment" issue. Like any other environment issue (like change of OS) the principle of "write once, test everywhere" still hol...
Effective method to hide email from spam bots
...impressive it fails to trigger my email client. Here's a fiddle for you to test with: jsfiddle.net/wd436tg3
– Ricardo Zea
Mar 9 '17 at 14:08
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Scanner vs. StringTokenizer vs. String.Split
... Would also be interesting to see Scanner's results on the same tests you ran on String.Split and StringTokenizer.
– Dave
Mar 27 '09 at 20:09
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In Python, what is the difference between “.append()” and “+= []”?
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The performance tests here are not correct:
You shouldn't run the profile only once.
If comparing append vs. += [] number of times you should declare append as a local function.
time results are different on different python versions: 64 a...
Remove redundant paths from $PATH variable
... I make no guarantees about compatibility with all other shells. I suggest testing it out on whatever shell you're using, and if it doesn't work for your shell, you can use Python if you have it installed - I added some Python to the answer to describe how.
– Aaron Hall♦
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How do you produce a .d.ts “typings” definition file from an existing JavaScript library?
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--allowJs with --declaration options can't be combined (tested in TypeScript 1.8 and 2.0). If I try, I get: error TS5053: Option 'allowJs' cannot be specified with option 'declaration'
– Alexey
Sep 27 '16 at 7:52
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How to check if a string contains an element from a list in Python
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extensionsToCheck = ('.pdf', '.doc', '.xls')
'test.doc'.endswith(extensionsToCheck) # returns True
'test.jpg'.endswith(extensionsToCheck) # returns False
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