Lambda Fairy

Lambda Fairy has asked 22 questions and find answers to 45 problems.

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Lambda Fairy questions

How can I case fold a string in Rust?
newtype around ST causes type error
optparse-applicative: Require at least one argument
What's the difference between Const and Constant?
What is the purpose of the IdentityT transformer?
Why is `.Select(...).Last()` optimized, but `.Select(...).Last(...)` not?
How do I delete a remote bookmark in Mercurial?
"Illegal instance declaration" when declaring instance of IsString

Lambda Fairy answers

Hiding internals when returning iterators in Rust
Any ideas why patterned SVG file is showing up blank in the browser?
Typescript: Property 'length' does not exist on type 'never'
fetch's type not matching when calling createHttpLink
Understanding &* to access a Rust Arc
What does 'MutVar#' mean?
Rustlang: Adding a return statement in a macro
How to prove a = b → a + 1 = b + 1 in lean?
haddock "could not find link destinations for"
Python and the Singleton Pattern [duplicate]