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Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.
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147
Update
data.table v1.9.6+ now supports OP's original attempt and the following answer is no lo...
Reduce, fold or scan (Left/Right)?
...hrough the first argument res of our binary operator minus:
val xs = List(1, 2, 3, 4)
def minus(res: Int, x: Int) = {
println(s"op: $res - $x = ${res - x}")
res - x
}
xs.reduceLeft(minus)
// op: 1 - 2 = -1
// op: -1 - 3 = -4 // de-cumulates value -1 in *first* operator arg `res`
// op: -4 - ...
Can I change the checkbox size using CSS?
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15 Answers
15
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How do I retrieve the number of columns in a Pandas data frame?
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312
Like so:
import pandas as pd
df = pd.DataFrame({"pear": [1,2,3], "apple": [2,3,4], "orange": [...
How to overcome TypeError: unhashable type: 'list'
...ue = [x.strip() for x in line]
key = line[0].strip()
value = line[1].strip()
# Now we check if the dictionary contains the key; if so, append the new value,
# and if not, make a new list that contains the current value
# (For future reference, this is a great place for a default...
How to create a UIView bounce animation?
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144
With iOS7 and UIKit Dynamics, there is no longer any need to use CAKeyframeAnimations or UIVie...
figure of imshow() is too small
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142
If you don't give an aspect argument to imshow, it will use the value for image.aspect in your...
how to set “camera position” for 3d plots using python/matplotlib?
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164
By "camera position," it sounds like you want to adjust the elevation and the azimuth angle th...
Scala constructor overload?
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186
It's worth explicitly mentioning that Auxiliary Constructors in Scala must either call the pri...
Rails hidden field undefined method 'merge' error
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417
You should do:
<%= f.hidden_field :service, :value => "test" %>
hidden_field expect...