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How to use sed to replace only the first occurrence in a file?
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144
# sed script to change "foo" to "bar" only on the first occurrence
1{x;s/^/first/;x;}
1,/fo...
Why does Decimal.Divide(int, int) work, but not (int / int)?
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219
int is an integer type; dividing two ints performs an integer division, i.e. the fractional par...
Finding all possible combinations of numbers to reach a given sum
... range(len(numbers)):
n = numbers[i]
remaining = numbers[i+1:]
subset_sum(remaining, target, partial + [n])
if __name__ == "__main__":
subset_sum([3,9,8,4,5,7,10],15)
#Outputs:
#sum([3, 8, 4])=15
#sum([3, 5, 7])=15
#sum([8, 7])=15
#sum([5, 10])=15
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How can I replace a regex substring match in Javascript?
That replaces the entire string str with 1 . I want it to replace the matched substring instead of the whole string. Is this possible in Javascript?
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In Ruby how do I generate a long string of repeated text?
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310
str = "0" * 999999
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How can I convert a zero-terminated byte array to string?
I need to read [100]byte to transfer a bunch of string data.
13 Answers
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What's the best way to get the last element of an array without deleting it?
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Regex how to match an optional character
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Use
[A-Z]?
to make the letter optional. {1} is redundant. (Of course you could also write [A-Z]{0,1} which would mean the same, but that's what the ? is there for.)
You could improve your regex to
^([0-9]{5})+\s+([A-Z]?)\s+([A-Z])([0-9]{3})([0-9]{3})([A-Z]{3})([A-...
Automatically update version number
... Visual Studio (2005/2008). I have tried to specify the AssemblyVersion as 1.0.* but it doesn't get me exactly what I want.
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