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Get list of a class' instance methods

... When i try print TestClass.new.instance_methods, i get this error my_class.rb:10:in <main>: undefined method instance_methods for #<TestClass:0x96b9d20> (NoMethodError) – Vladimir Tsukanov Jun 24 '11 at 14:04 ...
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What is the difference between a symbolic link and a hard link?

Recently I was asked this during a job interview. I was honest and said I knew how a symbolic link behaves and how to create one, but do not understand the use of a hard link and how it differs from a symbolic one. ...
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Twitter Bootstrap - add top space between rows

... answered Jan 20 '13 at 22:05 AcyraAcyra 14.7k1515 gold badges4141 silver badges5050 bronze badges ...
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How do you see recent SVN log entries?

Typing svn log spits out an incredibly long, useless list on a command line. I have no idea why that is the default. If I wanted to read (or even could read) 300 entries on the terminal, I wouldn't mind typing svn log --full or something similar. ...
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Using GPU from a docker container?

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To switch from vertical split to horizontal split fast in Vim

How can you switch your current windows from horizontal split to vertical split and vice versa in Vim? 8 Answers ...
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Understanding dict.copy() - shallow or deep?

... Nice answer, but you might consider correcting the grammatical error in your first sentence. And there's no reason to not use L again in b. Doing so would simplify the example. – Tom Russell Oct 27 '17 at 4:47 ...
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How do I get a div to float to the bottom of its container?

...em. – Traubenfuchs Oct 22 '14 at 13:05 Unable to wrap text around the bottom right box: all letters turn upside down, ...
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Redirect stderr and stdout in Bash

...I have a ruby script (which I don't want to modify in any way) that prints error messages in bold red. This ruby script is then invoked from my bash script (which I can modify). When I use the above, it prints the error messages in plain text, minus the formatting. Is there any way to retain on-scre...
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What's the opposite of head? I want all but the first N lines of a file

Given a text file of unknown length, how can I read, for example all but the first 2 lines of the file? I know tail will give me the last N lines, but I don't know what N is ahead of time. ...