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skava / exotic js

Repository URL to install this package:

Version: 2.0.8

/ README.md

exotic

it can be done in other languages, never before in js

in ocaml

https://reasonml.github.io/guide/javascript/converting/

in scala

https://alvinalexander.com/scala/how-to-cast-objects-class-instance-in-scala-asinstanceof https://twitter.github.io/scala_school/advanced-types.html https://docs.scala-lang.org/style/types.html

in swift

http://www.thomashanning.com/type-casting-in-swift/ https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/TypeCasting.html

in C

https://msdn.microsoft.com/en-us/library/system.iconvertible.aspx https://msdn.microsoft.com/en-us/library/dtb69x08(v=vs.110).aspx

in python

http://pybind11.readthedocs.io/en/stable/advanced/cast/custom.html

in ruby

https://idiosyncratic-ruby.com/54-try-converting.html

in go lang

https://play.golang.org/p/sYm1jTCMIf http://www.golangbootcamp.com/book/types https://thenewstack.io/understanding-golang-type-system/

in haskell

http://book.realworldhaskell.org/read/using-typeclasses.html

in erlang

http://erlang.org/doc/reference_manual/data_types.html

in smalltalk

https://www.gnu.org/software/smalltalk/manual/gst.html#Smalltalk-types

in js

https://developer.mozilla.org/en-US/docs/Mozilla/js-ctypes/Using_js-ctypes/Type_conversion http://webreflection.blogspot.ca/2011/09/introduction-to-js-ctypes.html

cast

cast & coerce values

why?

TypeGuards

(the assumption based on research & testing the compiled code, though it is likely there are more things to check and more known unknowns)

megamorphic code wrapping the monomorphic code is perfect
with the arg casting, it makes a solid decision tree, which ends up just becoming a GO TO LINE# -> easily optimized cast function "
this is how typescript should compile
this is likely why lodash has internal functions called base
the other way to handle it is throw errors with invalid types
almost every library has some "isX" util
@example isFunction, isNull, isError,
they get really hot, and they are really small, so they get inlined blazing fast and it's dope
... but if you have say 3 libraries, and each one has their own isFunction or isNull, that defeats the purpose! need a build function & compat checker to replace & merge as needed for best perf in apps not just libs