#1 Philip Potter - Equal Rights for Functional Objects

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Equal Rights for Functional Objects, or, The More Things Change, the More they Stay the Same

There are many ways of defining equality, particularly in a language which has both object-oriented and functional aspects. There's reference equality, numerical equality, shallow list equality, deep list equality, string equality, and even "fuzzy" floating-point equality. Which is the right to choose in any given situation? Which should i use for my equals() method on my custom object?

This paper answers all of these questions, by taking a seemingly complex problem and revealing an underlying simplicity. It does this by defining one equality operation that works in any situation.

The paper makes use of lisp syntax, but the ideas are applicable to most modern languages.

Can anyone sponsor pizza and drinks? Makes it much easier for me to host more things at uSwitch if someone else covers the food.