Daily Effect

This is a beginner-friendly course to get familiar with the Effect ecosystem. The aim of this course is to help you discover the most commonly used functions in the Effect libraries. The Effect docs are very thorough, but newcomers may find them overwhelming.

This course would make a great companion to other entry-level Effect courses. I really appreciated Sandro Maglione's course and Ethan Niser's workshop.

Effect consists of many libraries, each with many modules, each with many functions. In each lesson, we'll explore a single function. Thankfully, the most useful functions are often the simplest to understand.

• 1

  Effect.succeed

  Create an Effect with a known value

• 2

  Effect.runSync

  Execute an Effect synchronously, returning its value

• 3

  Effect.sync

  Create an Effect that defers execution

• 4

  Effect.map

  Transform the value inside an Effect

• 5

  Effect.fail

  Create an Effect that fails immediately

• 6

  Effect.flatMap

  Effectfully transform the value inside an Effect

• 7

  pipe

  Pass a value along a pipeline of functions

• 8

  Effect.catchAll

  Provide a fallback effect to use if something goes wrong

• 9

  Effect.try

  Attempt a synchronous operation that may fail

• 10

  Effect.runPromise

  Execute an Effect asynchronously, returning its value in a Promise

• 11

  Effect.promise

  Create an Effect that wraps an asynchronous computation

• 12

  Effect.tryPromise

  Wrap an asynchronous computation that may fail

• 13

  Effect.catchTag

  Handle a specific error based on tag

• 14

  Data.TaggedError

  Define a new type of error

• 15

  Effect.gen

  Use generator function syntax to write readable effect logic

• 16

  Context.Tag

  Define a tagged service for dependency injection

• 17

  Effect.provideService

  Provide a tagged service to the relevant effect

• 18

  Effect.provideServiceEffect

  Effectfully provide a tagged service to the relevant effect

• 19

  Context.GenericTag

  Define a Tag for use with Context

• 20

  Context.add

  Add a new item to an existing context

• 21

  Context.get

  Get a service from a context

• 22

  Context.empty

  Create an empty context

• 23

  Context.make

  Create a Context with one item

• 24

  Context.merge

  Combine two Contexts

• 25

  Effect.provide

  Provide multiple services with a single call

• 26

  Layer.succeed

  Construct a layer with a known value

• 27

  Layer.effect

  Construct a layer effectfully

• 28

  Layer.succeedContext

  Construct a layer from a Context

• 29

  Layer.effectContext

  Construct a layer effectfully from a whole context

• 30

  Layer.fail

  Construct a layer that will fail

• 31

  Layer.map

  Transform the context inside a Layer

• 33

  Layer.merge

  Combine layers to widen the input and output

• 34

  Layer.provide

  Combine layers by feeding outputs of one layer as inputs to another

• 35

  Layer.empty

  Combine layers by feeding outputs of one layer as inputs to another