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How to easily truncate an array with JavaScript?
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edited May 21 '15 at 1:37
David Mason
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How do you round a float to two decimal places in jruby
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edited May 23 '17 at 12:18
Community♦
111 silver badge
answered May 5 '12 at 16:06
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Multiple levels of 'collection.defaultdict' in Python
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347
Use:
from collections import defaultdict
d = defaultdict(lambda: defaultdict(int))
This wil...
MySql: Tinyint (2) vs tinyint(1) - what is the difference?
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edited Dec 2 '16 at 18:39
answered Dec 2 '16 at 18:33
Aa...
String formatting named parameters?
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In Python 2.6+ and Python 3, you might choose to use the newer string formatting method.
print('<a href="{0}">{0}</a>'.format(my_url))
which saves you from repeating the argument, or
print('<a href="{url}">{url}</a>'.format...
How can I check whether an array is null / empty?
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13 Answers
13
Active
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Converting a column within pandas dataframe from int to string
...hape(5,2),columns=list('AB'))
In [17]: df
Out[17]:
A B
0 0 1
1 2 3
2 4 5
3 6 7
4 8 9
In [18]: df.dtypes
Out[18]:
A int64
B int64
dtype: object
Convert a series
In [19]: df['A'].apply(str)
Out[19]:
0 0
1 2
2 4
3 6
4 8
Name: A, dtype: object
In [20]: df['A...
Flatten an irregular list of lists
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390
Using generator functions can make your example a little easier to read and probably boost the...
How to get unique values in an array
... arr.push(this[i]);
}
}
return arr;
}
var duplicates = [1, 3, 4, 2, 1, 2, 3, 8];
var uniques = duplicates.unique(); // result = [1,3,4,2,8]
console.log(uniques);
For more reliability, you can replace contains with MDN's indexOf shim and check if each element's indexOf is e...
Bare asterisk in function arguments?
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232
Bare * is used to force the caller to use named arguments - so you cannot define a function wit...