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How to maintain a Unique List in Java?

How to create a list of unique/distinct objects (no duplicates) in Java? 7 Answers 7 ...
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Why do you need explicitly have the “self” argument in a Python method?

When defining a method on a class in Python, it looks something like this: 10 Answers ...
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How to parse a CSV file in Bash?

I'm working on a long Bash script. I want to read cells from a CSV file into Bash variables. I can parse lines and the first column, but not any other column. Here's my code so far: ...
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Entity Framework 4 Single() vs First() vs FirstOrDefault()

I'm having a devil of a time finding a comparison of the different ways to query for a single item, and when to use each. 6...
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Can a shell script set environment variables of the calling shell? [duplicate]

I'm trying to write a shell script that, when run, will set some environment variables that will stay set in the caller's shell. ...
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What is the difference between null and undefined in JavaScript?

I want to know what the difference is between null and undefined in JavaScript. 33 Answers ...
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How to get UTC time in Python?

I've search a bunch on StackExchange for a solution but nothing does quite what I need. In JavaScript, I'm using the following to calculate UTC time since Jan 1st 1970: ...
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How do I connect to a MySQL Database in Python?

How do I connect to a MySQL database using a python program? 23 Answers 23 ...
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Algorithm to generate a crossword

Given a list of words, how would you go about arranging them into a crossword grid? 13 Answers ...
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What's the common practice for enums in Python? [duplicate]

What's the common practice for enums in Python? I.e. how are they replicated in Python? 4 Answers ...