While sometimes outside input can have influence on how a given stateful transaction transitions, there are many times where the current state at the time of a transaction. We can see the power of this type of transaction by seeing what it would take…

Redux provides a convenient helper for combining many reducers called combineReducer, but it focuses in on specific attributes on our state, making it incompatible with using the State ADT. We would like a way to avoid keeping all of our reducers in…

Using Naive JS: const {modify, get} = require('crocks/State'); const K = require('crocks/combinators/constant'); const B = require('crocks/combinators/composeB'); const assign = require('crocks/helpers/assign'); const prop = require('crocks/Maybe/pro…

Recently, I am learning Working with ADT. Got some extra thought about State Monad. Basiclly how to thinking in State. First, we need to know the type of State: State returns Pair with Unit on the left, and state on the right: State(state => Pair(Uni…

Not only will we need to give our initial state to a Redux store, we will also need to be able to reset our state at any time by dispatching an action. We can get the best of both worlds by having a function that will return an object with all of our…

Using put to update our state for a given state transaction can make it difficult to modify a given state based on its previous value. In this lesson we will explore a means to lift specialized functions that can be used modify our state’s value. The…

When we start to accumulate functions that all work on a given datatype, we end up creating a bunch of boilerplate code in almost every function to handle the changes we need to make to our records’ values. This can lead to not only undesirable boile…

Stateful computations require the ability for their state to change overtime. We take a look on one way to replace the state portion of our stateful datatype with a value. We explore the mechanics of how this can be accomplished and introduce the put…

When developing a Finite State Machine, it is often necessary to apply multiple transitions in tandem. To accomplish this in most Redux work flows requires at best, implementing multiple action handlers in separate reducers; or at worse, the need to…

Test Design Techniques - STATE BASED TESTING -Test note of “Essential Software Test Design” 2015-08-19 Content: 13.1 The Model  13.1.1 The ATM Machine13.2 Creating Base Test Cases  13.2.1 Ways of Covering the Graph  13.2.2 Coverage According to Chow …