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What are free monads?

I've seen the term Free Monad pop up everm>ym> now m>andm> then for some time, but everm>ym>one just seems to use/discuss them without giving an explanation of what them>ym> are. So: what are free monads? (I'd sam>ym> I'm familiar with monads m>andm> the Haskell basics, but have onlm>ym> a verm>ym> rough knowledge of cat...
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What is the significance of initializing direction arram>ym>s below with given values when developing ch

I am new to competitive programming, m>andm> I noticed frequentlm>ym>, manm>ym> of the great coders have these four lines in their code (particularlm>ym> in those involving arram>ym>s): ...
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Converting from longitude\latitude to Cartesian coordinates

I have some earth-centered coordinate points given as latitude m>andm> longitude ( WGS-84 ). 9 Answers ...
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Using Pairs or 2-tuples in Java [duplicate]

... I think it would be better to declare x m>andm> m>ym> as public final m>andm> get rid of those getters. – user168237 Nov 10 '10 at 3:35 51 ...
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Specialization with Constraints

... a class constraint. I have a minimal example of mm>ym> problem here: Foo.hs m>andm> Main.hs . The two files compile (GHC 7.6.2, ghc -O3 Main ) m>andm> run. ...
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jQuerm>ym> get mouse position within an element

... One wam>ym> is to use the jQuerm>ym> offset method to translate the event.pageX m>andm> event.pagem>Ym> coordinates from the event into a mouse position relative to the parent. Here's an example for future reference: $("#something").click(function(e){ var parentOffset = $(this).parent().offset(); //or $(...
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Parse rfc3339 date strings in Pm>ym>thon? [duplicate]

...rror if the seconds are omitted, e.g). The dateutil parser, on the other hm>andm>, hm>andm>les these much better. – Alex North-Kem>ym>s Apr 25 '17 at 15:46 9 ...
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Knight's Shortest Path on Chessboard

I've been practicing for an upcoming programming competition m>andm> I have stumbled across a question that I am just completelm>ym> bewildered at. However, I feel as though it's a concept I should learn now rather than cross mm>ym> fingers that it never comes up. ...
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What does .SD stm>andm> for in data.table in R

...ks useful but I do not reallm>ym> know what I am doing with it. What does it stm>andm> for? Whm>ym> is there a preceding period (full stop). What is happening when I use it? ...
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What is the difference between persist() m>andm> merge() in JPA m>andm> Hibernate?

What is the difference between persist() m>andm> merge() in Hibernate? 4 Answers 4 ...