cloudRoutine

open System.Collections.Generic
open Microsoft.FSharp.Collections


[<RequireQualifiedAccess>]
module Folds =

    // These are the fast implementations we actually want to use

cloudRoutine

# If this script is throwing an error near a Unicode symbol try resaving the file as UTF-8 with BOM
$psmodules = ";~\Documents\WindowsPowerShell\Modules"
# sometimes the module paths has been fucked before posh loads, but that won't stop us
$env:PSModulePath = $env:PSModulePath + $psmodules

# Set the OutputEncoding to Unicode so that the λ renders properly

[Console]::OutputEncoding = [System.Text.Encoding]::UTF8

cloudRoutine

# NOTE - If there are weird character errors when trying to load this profile
#   resave the file with the encoding `UTF-8 with BOM`   
 
#   ┌                   ┐
#     Setup Environment
#   └                   ┘

# change to codepage to display symbols properly
chcp 65001 | out-null

cloudRoutine

F# Advent 2021 Dec 08 - Fast data pipelines with F#6

Thanks to Sergey Tihon for running F# Weekly and F# Advent.

Thanks to manofstick for trying out the code and coming with invaluable feedback. Cistern.ValueLinq is very impressive.

TLDR; F#6 enables data pipelines with up to 15x less overhead than LINQ

There were many interesting improvements in F#6 but one in particular caught my eye, the attribute InlineIfLambda.

cloudRoutine

module StringMatching =
    open System


    /// Knuth-Morris-Pratt String Searching Algorithm  ///
    
    let kmp_search (text:string) (word:string) : int =   
        let kmp_table (word:string) =
            let table   = [| 1..word.Length |]
            table.[0]   <-  -1  

cloudRoutine

F# Advent 2016 (English) - December 10 - Implementing a persistent hash map.

This blog created for F# Advent 2016 (English)

Full source code can be found here

Changelog

1. 2016-12-10
2. New performance test - Anthony Lloyd (@AnthonyLloyd) suggested that I compare against Prime.Vmap.

cloudRoutine

XCC - XAML CONDITIONAL COMPILATION

https://github.com/firstfloorsoftware/xcc

BUILD TIME CODE GENERATION IN MSBUILD

cloudRoutine

Optimizing a simple problem

I was introduced to a simple optimization problem by one of my interns last week. He was about to participate in a friendly competition where they were asked to find a performant solution to the problem:

The problem

cloudRoutine

JSON Monadic Transformers

Full source at: https://gist.github.com/mrange/7c39333de480a8de5c812a1f6ba70173

A popular approach in Functional Languages to create parsers is to use parser combinators.

Parser combinators provide a way to compose parser of ever increasing complexity from simple parsers. Parser combinators

cloudRoutine

namespace CExprs

module LogoTurtle  =

    type Distance_Unit = STEPS
    type Rotation_Unit = GRADATIONS
    type Rotation_Direction = | LEFT | RIGHT
    let STEP = STEPS
    let GRADATION = GRADATIONS