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How do you match only valid roman numerals with a regular expression?
...mple:
0: <empty> matched by M{0}
1000: M matched by M{1}
2000: MM matched by M{2}
3000: MMM matched by M{3}
4000: MMMM matched by M{4}
You could, of course, use something like M* to allow any number (including zero) of thousands, if you want to allow bigger numbers...
What is the difference between the | and || or operators?
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12 Answers
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Is there common street addresses database design for all addresses of the world? [closed]
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12 Answers
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Adding a parameter to the URL with JavaScript
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32 Answers
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How to sort a list of strings numerically?
...t do anything with the results. What you want is:
list1 = ["1","10","3","22","23","4","2","200"]
list1 = [int(x) for x in list1]
list1.sort()
If for some reason you need to keep strings instead of ints (usually a bad idea, but maybe you need to preserve leading zeros or something), you can use a...
Find an element in a list of tuples
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240
If you just want the first number to match you can do it like this:
[item for item in a if it...
Bytes of a string in Java
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291
A string is a list of characters (i.e. code points). The number of bytes taken to represent t...
When should I use nil and NULL in Objective-C?
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edited Jan 27 '16 at 14:15
community wiki
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What does `kill -0 $pid` in a shell script do?
... then no signal is sent, but error checking is still performed.
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kill(2)
$ man 2 kill
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If sig is 0, then no signal is sent, but error checking is still performed; this
can be used to check for the existence of a process ID or process group ID.
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