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Remove empty elements from an array in Javascript
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Ruby max integer
... big they can be.
If you are looking for the machine's size, i.e. 64- or 32-bit, I found this trick at ruby-forum.com:
machine_bytes = ['foo'].pack('p').size
machine_bits = machine_bytes * 8
machine_max_signed = 2**(machine_bits-1) - 1
machine_max_unsigned = 2**machine_bits - 1
If you are look...
Best way to find the intersection of multiple sets?
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From Python version 2.6 on you can use multiple arguments to set.intersection(), like
u = set.intersection(s1, s2, s3)
If the sets are in a list, this translates to:
u = set.intersection(*setlist)
where *a_list is list expansion
Note that...
Numpy index slice without losing dimension information
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edited Nov 23 '17 at 5:53
Atcold
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answ...
Memoization in Haskell?
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259
We can do this very efficiently by making a structure that we can index in sub-linear time.
B...
Can't install RMagick 2.13.1. Can't find MagickWand.h.
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32 Answers
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How to get row from R data.frame
...is, for example:
#Add your data
x <- structure(list(A = c(5, 3.5, 3.25, 4.25, 1.5 ),
B = c(4.25, 4, 4, 4.5, 4.5 ),
C = c(4.5, 2.5, 4, 2.25, 3 )
),
.Names = c("A", "B", "C"),
class = "da...
How assignment works with Python list slice?
...two distinct operation that use very similar syntax:
1) slicing:
b = a[0:2]
This makes a copy of the slice of a and assigns it to b.
2) slice assignment:
a[0:2] = b
This replaces the slice of a with the contents of b.
Although the syntax is similar (I imagine by design!), these are two diff...
Get operating system info
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202
The code below could explain in its own right, how http://thismachine.info/ is able to show wh...
How do I concatenate or merge arrays in Swift?
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12 Answers
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