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Test if string is a number in Ruby on Rails
...shua Pinter
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answered Apr 14 '11 at 10:13
Jakob SJakob S
17.6k33 gold b...
How to create byte array from HttpPostedFile
... fileData = null;
using (var binaryReader = new BinaryReader(Request.Files[0].InputStream))
{
fileData = binaryReader.ReadBytes(Request.Files[0].ContentLength);
}
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List of tuples to dictionary
...
Boris
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answered Jun 29 '11 at 14:36
Sven MarnachSven Ma...
Java 8 stream reverse order
...ect[] temp = input.toArray();
return (Stream<T>) IntStream.range(0, temp.length)
.mapToObj(i -> temp[temp.length - i - 1]);
}
Another technique uses collectors to accumulate the items into a reversed list. This does lots of insertions at the front of Ar...
Adding a new array element to a JSON object
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answered Sep 19 '13 at 1:20
Paul S.Paul S.
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Formatting “yesterday's” date in python
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406
Use datetime.timedelta()
>>> from datetime import date, timedelta
>>> yester...
How to get the last N rows of a pandas DataFrame?
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408
Don't forget DataFrame.tail! e.g. df1.tail(10)
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The way to check a HDFS directory's size?
...
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How to get indices of a sorted array in Python
...able:
>>> import numpy
>>> numpy.argsort(myList)
array([0, 1, 2, 4, 3])
http://docs.scipy.org/doc/numpy/reference/generated/numpy.argsort.html
This returns the arguments that would sort the array or list.
...
Python strptime() and timezones?
...ormat. This is equivalent to datetime(*(time.strptime(date_string, format)[0:6])).
See that [0:6]? That gets you (year, month, day, hour, minute, second). Nothing else. No mention of timezones.
Interestingly, [Win XP SP2, Python 2.6, 2.7] passing your example to time.strptime doesn't work but if ...