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How to Install GraalVM Community Edition on Linux

Note: Tested on Fedora only

1. Download the new release of GraalVM and unpack it anywhere in your filesystem:

$ tar -xvzf graalvm-ce-1.0.0-rc14-linux-amd64.tar.gz

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package org.apache.lucene.util;

import java.lang.reflect.Constructor;
import java.lang.reflect.UndeclaredThrowableException;

public final class AttributeFactoryHelpers {
    static final AttributeFactory DEFAULT = new DefaultAttributeFactory();

    static final Constructor<? extends AttributeImpl> findAttributeImplCtor(Class<? extends AttributeImpl> clazz) {
        try {

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let addChild updateNode addNode value parent =
  match withNewChild value parent with
  | None -> async.Return None
  | Some (newParent, child) as path ->
    async { do! addNode child
            do! updateNode newParent
            return Some child }
            
let addChildById getNode updateNode addNode logAction value parentId =
  async { let! parent = getNode parentId

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$remoteport = bash.exe -c "ifconfig eth0 | grep 'inet '"
$found = $remoteport -match '\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}';

if( $found ){
  $remoteport = $matches[0];
} else{
  echo "The Script Exited, the ip address of WSL 2 cannot be found";
  exit;
}

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module RResult =
  open System.Collections.Generic
  open System.Text

  [<RequireQualifiedAccess>]
  type RBad =
    | Message         of string
    | Exception       of exn
    | Object          of obj
    | DescribedObject of string*obj

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Railway Oriented Programming and F# Result

Full source: https://gist.github.com/mrange/aa9e0898492b6d384dd839bc4a2f96a1

Option<_> is great for ROP (Railway Oriented Programming) but we get no info on what went wrong (the failure value is None which carries no info).

With the introduction F# 4.1 we got Result<_, _> a "smarter" Option<_> as it allows us to pass a failure value.

However, when one inspects the signature of Result.bind one sees a potential issue for ROP:

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// <copyright file="CustomClaimsPrincipalFactory.cs" company="">
//     Copyright (c)
// </copyright> 

using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Threading.Tasks;
using Platform.Business.Interfaces;
using Platform.Domain.Entities;

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[assembly: OwinStartup(typeof(Startup))]

namespace Api
{
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            var config = new HttpConfiguration();

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public IServiceProvider ConfigureServices(IServiceCollection services)
{
    // Configure regular ASP.NET Core services
    services.AddMvc();
    // ...
    
    // Send configuration to Castle Windsor
    Container.Populate(services);
    Container.BeginScope();
    return Container.Resolve<IServiceProvider>();

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# Ruby is our language as asciidoctor is a ruby gem.
lang: ruby
before_install:
  - sudo apt-get install pandoc
  - gem install asciidoctor
script:
  - make
after_success:
  - .travis/push.sh
env: