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Concatenating two one-dimensional NumPy arrays
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388
The line should be:
numpy.concatenate([a,b])
The arrays you want to concatenate need to passe...
What do all of Scala's symbolic operators mean?
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530
I divide the operators, for the purpose of teaching, into four categories:
Keywords/reserved ...
Convert numpy array to tuple
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edited Jul 18 '13 at 22:34
answered Apr 4 '12 at 17:35
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Length of an integer in Python
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341
If you want the length of an integer as in the number of digits in the integer, you can always...
jQuery get value of select onChange
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edited Aug 4 '18 at 15:53
moffeltje
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answered J...
Is there a decorator to simply cache function return values?
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Starting from Python 3.2 there is a built-in decorator:
@functools.lru_cache(maxsize=100, typed=False)
Decorator to wrap a function with a memoizing callable that saves up to the maxsize most recent calls. It can save time when an expensive or...
R - Concatenate two dataframes?
...olumn b to data frame b.
Results
> a <- data.frame(a=c(0,1,2), b=c(3,4,5), c=c(6,7,8))
> a
a b c
1 0 3 6
2 1 4 7
3 2 5 8
> b <- data.frame(a=c(9,10,11), c=c(12,13,14))
> b
a c
1 9 12
2 10 13
3 11 14
> b$b <- NA
> b
a c b
1 9 12 NA
2 10 13 NA
3 11 14 NA
> ...
How to handle exceptions in a list comprehensions?
...rtelli
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14
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How to validate an Email in PHP?
... Manual should suffice.
Update 1: As pointed out by @binaryLV:
PHP 5.3.3 and 5.2.14 had a bug related to
FILTER_VALIDATE_EMAIL, which resulted in segfault when validating
large values. Simple and safe workaround for this is using strlen()
before filter_var(). I'm not sure about 5.3.4 fin...