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How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?
My current version of ruby is ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.5.0] but I want to update it to the latest patch level using rvm. How can I do this?
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Error to install Nokogiri on OSX 10.9 Maverick?
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245
You can also install Nokogiri on Mac OS X 10.9 Mavericks with full XCode Install using:
gem i...
Reduce, fold or scan (Left/Right)?
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372
In general, all 6 fold functions apply a binary operator to each element of a collection. The re...
Insert an element at a specific index in a list and return the updated list
...can do b = a[:index] + [obj] + a[index:].
However, another way is:
a = [1, 2, 4]
b = a[:]
b.insert(2, 3)
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Find the most frequent number in a numpy vector
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Python 3.x rounding behavior
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162
Python 3's way (called "round half to even" or "banker's rounding") is considered the standard r...
How to check the version before installing a package using apt-get?
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329
OK, I found it.
apt-cache policy <package name> will show the version details.
It also sh...
Good example of livelock?
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120
Here's a very simple Java example of livelock where a husband and wife are trying to eat soup, ...
How do shift operators work in Java? [duplicate]
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214
System.out.println(Integer.toBinaryString(2 << 11));
Shifts binary 2(10) by 11 times ...