Andre Sanches andresanches

Extracted from the highest voted answer, by JacquesB, on https://stackoverflow.com/questions/44965/what-is-a-monad

First: The term monad is a bit vacuous if you are not a mathematician. An alternative term is computation builder which is a bit more descriptive of what they are actually useful for.

They are a pattern for chaining operations. It looks a bit like method chaining in object-oriented languages, but the mechanism is slightly different.

The pattern is mostly used in functional languages (especial Haskell uses them pervasively) but can be used in any language which support higher-order functions (that is, functions which can take other functions as arguments).

Arrays in JavaScript support the pattern, so let’s use that as the first example.

Applied Functional Programming with Scala - Notes

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

	package com.turo.security.authorization.spicedb;

	import com.authzed.api.v1.Core.ObjectReference;
	import com.authzed.api.v1.Core.Relationship;
	import com.authzed.api.v1.Core.RelationshipUpdate;
	import com.authzed.api.v1.Core.RelationshipUpdate.Operation;
	import com.authzed.api.v1.Core.SubjectReference;
	import com.authzed.api.v1.PermissionService.CheckPermissionRequest;
	import com.authzed.api.v1.PermissionService.CheckPermissionResponse;
	import com.authzed.api.v1.PermissionService.Consistency;

	#include <ESP8266WiFi.h>
	#include <ESP8266WebServer.h>
	#include <ESP8266mDNS.h>

	String wifi_ssid = "ADD WIFI SSID HERE";
	String wifi_password = "ADD WIFI PASSWORD HERE";
	ESP8266WebServer server(80);

	// Function prototypes
	void connectWifi();

	set nu
	set softtabstop=2
	set tabstop=2
	set shiftwidth=2
	set expandtab
	set ignorecase
	set hlsearch
	set showtabline=2
	set smartindent
	syntax on

	#set-option -g prefix M-b
	setw -g mode-keys vi
	setw -g mouse on
	set -g pane-border-status top
	set-option -g history-limit 5000
	bind-key -T prefix C-s setw synchronize-pane
	bind t command-prompt -p "(rename-pane)" -I "#T" "select-pane -T '%%'"
	set -g base-index 1

	# Emulate scrolling by sending up and down keys if these commands are running in the pane

	#! /usr/bin/env bash
	#
	# Usage: update-godaddy-dns.sh "api_key" "api_secret" "domain_domain" "domain_name" "log_file"
	# Note: log_file defaults to /var/log/update-godaddy-dns.log if not provided

	set -e
	set -o pipefail

	log_file="/var/log/update-godaddy-dns.log"