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data.table vs dplyr: can one do something well the other can't or does poorly?
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4 Answers
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What's the main difference between Java SE and Java EE? [duplicate]
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edited Dec 25 '13 at 7:46
Community♦
111 silver badge
answered Jun 30 '09 at 18:40
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How to change Status Bar text color in iOS
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54 Answers
54
Active
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What is the difference between “def” and “val” to define a function
...; Int = {
val r = util.Random.nextInt
() => r
}
test()
// Int = -1049057402
test()
// Int = -1049057402 - same result
def test: () => Int = {
val r = util.Random.nextInt
() => r
}
test()
// Int = -240885810
test()
// Int = -1002157461 - new result
val evaluates when defined, de...
How can I compare two lists in python and return matches
..., but by far the most obvious way to do it is:
>>> a = [1, 2, 3, 4, 5]
>>> b = [9, 8, 7, 6, 5]
>>> set(a) & set(b)
{5}
if order is significant you can do it with list comprehensions like this:
>>> [i for i, j in zip(a, b) if i == j]
[5]
(only works for e...
Very large matrices using Python and NumPy
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edited Jul 13 '14 at 13:26
Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
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How to make --no-ri --no-rdoc the default for gem install?
... Khachaturyan
5,90933 gold badges3232 silver badges3434 bronze badges
answered Sep 6 '09 at 16:10
JirapongJirapong
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CSS: center element within a element
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#parent {
text-align:center;
background-color:blue;
height:400px;
width:600px;
}
.block {
height:100px;
width:200px;
text-align:left;
}
.center {
margin:auto;
background-color:green;
}
.left {
margin:auto auto auto 0;
background-color:red...
Why can't I see the “Report Data” window when creating reports?
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edited Mar 19 '14 at 17:05
answered Dec 6 '11 at 19:31
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Redirect stdout to a file in Python?
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418
If you want to do the redirection within the Python script, setting sys.stdout to a file objec...