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Add SUM of values of two LISTS into new LIST
...ave a list of lists (instead of just two lists):
lists_of_lists = [[1, 2, 3], [4, 5, 6]]
[sum(x) for x in zip(*lists_of_lists)]
# -> [5, 7, 9]
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Convert a list to a data frame
I have a nested list of data. Its length is 132 and each item is a list of length 20. Is there a quick way to convert this structure into a data frame that has 132 rows and 20 columns of data?
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How to debug a referenced dll (having pdb)
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If you have a project reference, it should work immediately.
If it is a file (dll) reference, y...
What is the difference between map and flatMap and a good use case for each?
...wo line-lengths:
rdd.map(_.length).collect
res1: Array[Int] = Array(13, 16)
But flatMap (loosely speaking) transforms an RDD of length N into a collection of N collections, then flattens these into a single RDD of results.
rdd.flatMap(_.split(" ")).collect
res2: Array[String] = Array(...
How do I convert Word files to PDF programmatically? [closed]
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w5m
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answered Mar 3 '09 at 20:58
Eric NessEric Ness
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How to join strings in Elixir?
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answered Dec 29 '13 at 19:43
thiagofmthiagofm
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How to pass command line arguments to a rake task
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389
Options and dependencies need to be inside arrays:
namespace :thing do
desc "it does a thing...
Ruby - elegantly convert variable to an array if not an array already
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[*foo] or Array(foo) will work most of the time, but for some cases like a hash, it messes it up...
How can I get a file's size in C++? [duplicate]
...essarily return the right value. See http://stackoverflow.com/a/22986486/1835769
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const char* concatenation
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answered Jan 3 '10 at 14:05
codaddictcodaddict
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