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Convert columns to string in Pandas
...n (and therefore your keys to strings):
In [11]: df = pd.DataFrame([['A', 2], ['A', 4], ['B', 6]])
In [12]: df.to_json()
Out[12]: '{"0":{"0":"A","1":"A","2":"B"},"1":{"0":2,"1":4,"2":6}}'
In [13]: df[0].to_json()
Out[13]: '{"0":"A","1":"A","2":"B"}'
Note: you can pass in a buffer/file to save t...
Numpy how to iterate over columns of array?
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228
Just iterate over the transposed of your array:
for column in array.T:
some_function(colum...
Python integer division yields float
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292
Take a look at PEP-238: Changing the Division Operator
The // operator will be available t...
Rotating a two-dimensional array in Python
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Consider the following two-dimensional list:
original = [[1, 2],
[3, 4]]
Lets break it down step by step:
>>> original[::-1] # elements of original are reversed
[[3, 4], [1, 2]]
This list is passed into zip() using argument unpacking, so the zip call ends up...
Small Haskell program compiled with GHC into huge binary
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2 Answers
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Get PostGIS version
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edited Mar 28 '13 at 20:19
Brad Koch
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How to merge 2 JSON objects from 2 files using jq?
...t will merge them recursively. For example,
jq -s '.[0] * .[1]' file1 file2
Important: Note the -s (--slurp) flag, which puts files in the same array.
Would get you:
{
"value1": 200,
"timestamp": 1382461861,
"value": {
"aaa": {
"value1": "v1",
"value2": "v2",
"value3...
Appending an element to the end of a list in Scala
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List(1,2,3) :+ 4
Results in List[Int] = List(1, 2, 3, 4)
Note that this operation has a complexity of O(n). If you need this operation frequently, or for long lists, consider using another data type (e.g. a ListBuffer).
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Why is GHC so large/big?
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edited Feb 1 '11 at 20:04
answered Feb 1 '11 at 19:48
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Matplotlib: “Unknown projection '3d'” error
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edited Apr 4 '19 at 18:23
Matthew Salvatore Viglione
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