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Python Pandas: Get index of rows which column matches certain value
... pd.DataFrame({'BoolCol': [True, False, False, True, True]},
index=[10,20,30,40,50])
In [53]: df
Out[53]:
BoolCol
10 True
20 False
30 False
40 True
50 True
[5 rows x 1 columns]
In [54]: df.index[df['BoolCol']].tolist()
Out[54]: [10, 40, 50]
If you want to use the index...
Using bitwise OR 0 to floor a number
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163
How does it work? Our theory was that using such an operator casts the
number to an integ...
Will web browsers cache content over https
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134
By default web browsers should cache content over HTTPS the same as over HTTP, unless explicit...
Default value of BOOL
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175
There is no default value if you write
-(void)somemethod {
BOOL x; // <--- no default v...
How can I resolve “Error: No developer directory found at /Developer”?
I just upgraded XCode to 4.3.1.
I'm using a script to build (and then deploy through Testflight) my app.
But I now receive this error:
...
Select 50 items from list at random to write to file
... space efficient for sampling from a
large population: sample(xrange(10000000), 60)
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How to check if all list items have the same value and return it, or return an “otherValue” if they
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155
var val = yyy.First().Value;
return yyy.All(x=>x.Value == val) ? val : otherValue;
Clean...
how to reference a YAML “setting” from elsewhere in the same YAML file?
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130
I don't think it is possible. You can reuse "node" but not part of it.
bill-to: &id001
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Private virtual method in C++
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118
Herb Sutter has very nicely explained it here.
Guideline #2: Prefer to make virtual functions...