随笔分类 - Compose
摘要：Learning notes. Video. Less than: If you use 'ramda', you maybe know 'lt, gt'.. Is '2' less than '1' , the result is false. We can see that the data i
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摘要：Let's say we want to write a most simple implementation 'avg' function: Basiclly, the 'avg' function doing two things: Calculate sum Divide sum / leng
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摘要：For example, in React application, we have initial state; We have a toggle button, which everytime, it is toggle 'ui.filterGroups.status' to true/fals
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摘要：For example we have a component, it needs to call 'react-redux' connect function. For the hightlighted part, there can be many possible reason for it
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摘要：Imaging we have a deck of cards, eveytimes we need to pick one card from deck, the result we want to have is: For selected, each time we want only one
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摘要：Using Naive JS: The main problem is inside 'rando' function, not really a FP way doing stuff. Arrow approach: It becomes complex with we need to do Pa
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摘要：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
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摘要：In previous post, Arrow Functor with contramap, we have seen how to opreating on params before we invoke the function by using Arrow + contramap. It h
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摘要：What is Arrow Functor? Arrow is a Profunctor that lifts a function of type a -> b and allows for lazy execution of the function. Arrow can be consider
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摘要：Let's we have some prediction functions, for each prediction function has a corresponding tag: So if we have input as: Also we wish our program to the
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摘要：What we are going to do in this post, is to build a random number generator. As you might know that Javascript provides Math.random(), but the problem
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摘要：The act of currying can be described as taking a multivariate function and turning it into a series of unary functions. Let's see an example: This is
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摘要：This post is similar to previous post. The difference is in this post, we are going to see how to handle both successfuly result and error result by u
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摘要：Let's say we are going to read some files, return the first file which pass the prediction method, this prediction method can be just check whether th
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摘要：We see three varied examples of where natural transformations come in handy. Let's mark the law here for Natural Transformations: Then let's see why w
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