| module Program = | |
| type InMemoryDb(replica: ReplicaId) = | |
| let snapshot = ref null | |
| let mutable events : Map<uint64,obj> = Map.empty | |
| interface Db with | |
| member _.SaveSnapshot state = async { snapshot := (box state) } | |
| member _.LoadSnapshot<'s>() = async { | |
| match !snapshot with |
In the past, I've written composition functions in both Elm and Haskell that take multiple parameters for the leftmost function, i.e. the function that gets applied first.
(All examples here are in Haskell)
Here was my Haskell implemenation (stolen from the web):
compose2 :: (c -> d) -> (a -> b -> c) -> a -> b -> d
This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.
The script is here:
#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"
| # 0. Make sure you have Ruby 1.9.3 installed, and optionally RVM and PostgreSQL | |
| # 0.2 If you are on the Mac, make sure you have a c compiler by installing XCode Command Line Tools or gcc4.2 with homebrew | |
| # https://github.com/mxcl/homebrew/wiki/Custom-GCC-and-cross-compilers | |
| # 0.5 Make sure you have bundler version ~> 1.2 as Rails depends on it | |
| gem install bundler | |
| # 1. Get edge Rails source (master branch) | |
| git clone https://github.com/rails/rails.git |
| #!/bin/bash | |
| alias ..="cd .." | |
| alias ls="ls -p" | |
| alias la="ls -lA" | |
| alias l="ls -l" | |
| alias ll="ls -l" | |
| alias psf="ps -cU `whoami`" | |
| alias grep="grep --color=auto" | |
| alias cack="ack --cpp" |
