DJG

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DJG has asked 21 questions and find answers to 21 problems.

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DJG questions

Why is there a nested IO monad, IO (IO ()), as the return value of my function?
Why do some languages return nil when a key is not in a dictionary, while Python throws an exception?
Composing ExitCodes in Turtle. Why is there no Monad/Monad Transformer instance?
More Pythonic way of counting things in a heavily nested defaultdict
Convert GHC.Int.Int64 to Int
Emacs, Clojure, lein and nrepl: *nrepl* buffer shows up blank
Use repl for Hy in Emacs
Haskell: How to organize a group of functions that all take the same arguments
Scala: How can I install a package system wide for working with in the repl?
Class constructors and keyword arguments - How does Python determine which one is unexpected?

DJG answers

Using the for list comprehension returns unexpected results
Vim Navigation Requires Too Much Thinking [closed]
make-keyword-map in Clojure - Idiomatic?
How come retrieving an element from a list is O(1) [duplicate]
Process n items from a list at a time in Lisp
Summing 1 through 1,000,000 in Haskell gives a stack overflow. What's happening under the hood?
Python to JavaScript converter [closed]
Converting String to integer in Scheme
How come list element lookup is O(1) in Python?
Declare an empty two-dimensional array in Javascript?