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Javascript equivalent of Python's zip function
...rgument syntax, so the following function definition will act like python, but see below for disclaimer... this will not be its own inverse so zip(zip(x)) will not equal x; though as Matt Kramer points out zip(...zip(...x))==x (like in regular python zip(*zip(*x))==x))
Alternative definition equiv....
Get top n records for each group of grouped results
The following is the simplest possible example, though any solution should be able to scale to however many n top results are needed:
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How to sort an array in descending order in Ruby
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It's always enlightening to do a benchmark on the various suggested answers. Here's what I found out:
#!/usr/bin/ruby
require 'benchmark'
ary = []
1000.times {
ary << {:bar => rand(1000)}
}
n = 500
Benchmark.bm(20) do |x|
x.report("sort")...
Serializing object that contains cyclic object value
I have an object (parse tree) that contains child nodes which are references to other nodes.
7 Answers
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C# Regex for Guid
...tes around each Guid value. I was thinking I could use a Regex to do this but I'm not exactly a Regex guru.
6 Answers
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Weird Integer boxing in Java
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The true line is actually guaranteed by the language specification. From section 5.1.7:
If the value p being boxed is true,
false, a byte, a char in the range
\u0000 to \u007f, or an int or short
number between -128 and 127, then let
r1 and r2 be the...
How do you create a remote Git branch?
I created a local branch which I want to 'push' upstream. There is a similar question here on Stack Overflow on how to track a newly created remote branch.
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How can I multiply and divide using only bit shifting and adding?
How can I multiply and divide using only bit shifting and adding?
14 Answers
14
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FIND_IN_SET() vs IN()
I have 2 tables in my database. One is for orders, and one is for companies.
6 Answers
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Converting strings to floats in a DataFrame
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NOTE: pd.convert_objects has now been deprecated. You should use pd.Series.astype(float) or pd.to_numeric as described in other
answers.
This is available in 0.11. Forces conversion (or set's to nan)
This will work even when astype will fa...