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Java ArrayList - how can I tell if two lists are equal, order not mattering?

I have two ArrayList s of type Answer (self-made class). 18 Answers 18 ...
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Does Python have a ternary conditional operator?

If Python does not have a ternary conditional operator, is it possible to simulate one using other language constructs? 26 ...
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What does “O(1) access time” mean?

I have seen this term "O(1) access time" used to mean "quickly" but I don't understand what it means. The other term that I see with it in the same context is "O(n) access time". Could someone please explain in a simple way what these terms mean? ...
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How can two strings be concatenated?

How can I concatenate (merge, combine) two values? For example I have: 12 Answers 12 ...
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How to sum a variable by group

I have a data frame with two columns. First column contains categories such as "First", "Second", "Third", and the second column has numbers that represent the number of times I saw the specific groups from "Category". ...
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Static constant string (class member)

I'd like to have a private static constant for a class (in this case a shape-factory). 11 Answers ...
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How do I include a pipe | in my linux find -exec command?

This isn't working. Can this be done in find? Or do I need to xargs? 6 Answers 6 ...
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Integrating the ZXing library directly into my Android application

...ing this in mere desperation :) I've been assigned to make a standalone barcode scanner (as a proof of concept) to an Android 1.6 phone. ...
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What is the difference between const and readonly in C#?

What is the difference between const and readonly in C#? 31 Answers 31 ...
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When to use references vs. pointers

I understand the syntax and general semantics of pointers versus references, but how should I decide when it is more-or-less appropriate to use references or pointers in an API? ...