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How to sort a dataframe by multiple column(s)
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19 Answers
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Sorting 1 million 8-decimal-digit numbers with 1 MB of RAM
I have a computer with 1 MB of RAM and no other local storage. I must use it to accept 1 million 8-digit decimal numbers over a TCP connection, sort them, and then send the sorted list out over another TCP connection.
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Can you supply arguments to the map(&:method) syntax in Ruby?
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141
You can create a simple patch on Symbol like this:
class Symbol
def with(*args, &block)...
How to get the last N records in mongodb?
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15 Answers
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How can I eliminate slow resolving/loading of localhost/virtualhost (a 2-3 second lag) on Mac OS X L
...nvironments on Mac OS X Lion (brand new macbook air purchased in January 2012), I have noticed that resolving to a virtual host is very slow (around 3 seconds) the first time but after that is fast as long as I continue loading it regularly.
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Why are flag enums usually defined with hexadecimal values
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186
Rationales may differ, but an advantage I see is that hexadecimal reminds you: "Okay, we're no...
Can I use CASE statement in a JOIN condition?
... JOIN sys.allocation_units a
ON CASE
WHEN a.type IN (1, 3) AND a.container_id = p.hobt_id THEN 1
WHEN a.type IN (2) AND a.container_id = p.partition_id THEN 1
ELSE 0
END = 1
Note that you need to do something with the returned value, e.g. comp...
How to convert ‘false’ to 0 and ‘true’ to 1 in Python
Is there a way to convert true of type unicode to 1 and false of type unicode to 0 (in Python)?
7 Answers
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Installed Java 7 on Mac OS X but Terminal is still using version 6
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edited Jun 20 at 9:12
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answered Oct 6 '12 at 7:03
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