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Why does the C# compiler go mad on this nested LINQ query?
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40
I believe that it's related to type inference and/or lambda generation (when type inference has...
Booleans, conditional operators and autoboxing
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4 Answers
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How to jQuery clone() and change id?
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214
$('#cloneDiv').click(function(){
// get the last DIV which ID starts with ^= "klon"
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How do I retrieve the number of columns in a Pandas data frame?
...so:
import pandas as pd
df = pd.DataFrame({"pear": [1,2,3], "apple": [2,3,4], "orange": [3,4,5]})
len(df.columns)
3
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how do you filter pandas dataframes by multiple columns
...b-statements with ():
males = df[(df[Gender]=='Male') & (df[Year]==2014)]
To store your dataframes in a dict using a for loop:
from collections import defaultdict
dic={}
for g in ['male', 'female']:
dic[g]=defaultdict(dict)
for y in [2013, 2014]:
dic[g][y]=df[(df[Gender]==g) & (d...
Unique combination of all elements from two (or more) vectors
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141
this maybe what you are after
> expand.grid(a,b)
Var1 Var2
1 ABC 2012-05-01
2 ...
Map function in MATLAB?
...for numeric arrays:
>> y = arrayfun(@(x) x^2, 1:10)
y =
1 4 9 16 25 36 49 64 81 100
There are two other built-in functions that behave similarly: cellfun (which operates on elements of cell arrays) and structfun (which operates on each field of a structure)...
How do I draw a grid onto a plot in Python?
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edited Mar 20 '17 at 17:42
Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
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Disable intellij indexing on specific folder
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4 Answers
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