随笔分类 - Javascript
摘要：We rewrite the Box example using lazy evaulation. Here is Box example: So how to make it as Lazy Box? The Answer is instead of passing a value to the
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摘要：Previously we have seen how to use Concat with reduce: To simply this, we can use 'fold': Javascript arrray doesn't have 'fold' so we use immutable-ex
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摘要：What is applicative functor: the ability to apply functors to each other. For example we have tow functors: Container(2), Container(3) We cannot just
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摘要：monoids is a semi-group with a neutral element. A semigroup, it does not have an element to return so it's not a safe operation, whereas with the mono
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摘要：Before we introduce what is Monad, first let's recap what is a pointed functor: A pointed functor is a Functor with .of() method Why pointed Functor i
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摘要：In this post, we are going to see how to use Ramda Lens. For example, we have data: R.lens: R.lens takes a getter and a setter: R.lensProp: There is a
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摘要：A pointed functor is a functor with an of method What's important here is the ability to drop any value in our type and start mapping away. The benifi
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摘要：We will see a peculiar example of a pure function. This function contained a side-effect, but we dubbed it pure by wrapping its action in another func
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摘要：An introduction to concatting items via the formal Semi-group interface. Semi-groups are simply a type with a concat method that are associative. We d
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摘要：It is really important to understand function signature in functional programming. The the code example below: 'map' is pointfree version of any founc
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摘要：Transducers are composable algorithmic transformations. They are independent from the context of their input and output sources and specify only the e
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摘要：Maybe has two types: Just / Nothing. Just() will just return the value that passed in. Nothing returns nothing... Just/ Nothing are both functors, the
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摘要：We refactor a function that uses try/catch to a single composed expression using Either. We then introduce the chain function to deal with nested Eith
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摘要：We would like the ability to group a series of actions to be dispatched with single dispatching functions used as handlers in various parts of our gam
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摘要：We only have a few dispatching functions that need to be known by our React Application. Each one actually has multiple actions that need to be dispat
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摘要：With our Redux implementation lousy with State ADT based reducers, it is time to hook it all up to a React Shell. Having already built out some UI/UX
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摘要：With a well defined demarcation point between Redux and our State ADT based model, hooking up to a Redux store is no different than any other Redux ba
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摘要：When using ADTs in our code base, it can be difficult to use common debugging tools like watches and breakpoints. This is mainly due to the common pat
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摘要：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
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摘要：Redux provides a convenient helper for combining many reducers called combineReducer, but it focuses in on specific attributes on our state, making it
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