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Array slicing in Ruby: explanation for illogical behaviour (taken from Rubykoans.com)

I was going through the exercises in Ruby Koans and I was struck by the following Ruby quirk that I found really unexplainable: ...
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How can I check if a file exists in Perl?

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Default parameters with C++ constructors [closed]

Is it good practice to have a class constructor that uses default parameters, or should I use separate overloaded constructors? For example: ...
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The simplest possible JavaScript countdown timer? [closed]

Just wanted to ask how to create the simplest possible countdown timer. 3 Answers 3 ...
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How to list all installed packages and their versions in Python?

Is there a way in Python to list all installed packages and their versions? 11 Answers ...
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How to use an existing database with an Android application [duplicate]

I have already created an SQLite database. I want to use this database file with my Android project. I want to bundle this database with my application. ...
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Implicit type conversion rules in C++ operators

I want to be better about knowing when I should cast. What are the implicit type conversion rules in C++ when adding, multiplying, etc. For example, ...
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How to tell Eclipse Workspace?

Is there a way to tell what is the current Eclipse workspace you are currently working on? 25 Answers ...
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Find when a file was deleted in Git

I have a Git repository with n commits. 6 Answers 6 ...
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How to parse a string into a nullable int

I'm wanting to parse a string into a nullable int in C#. ie. I want to get back either the int value of the string or null if it can't be parsed. ...