Yuto

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JavaScript/TypeScript

JavaScript/TypeScript currying arrow function

The currying or curried function is an arrow function that returns an arrow function. If the internal object also returns a function, it looks not readable. Let's break a big currying function into small pieces and understand how it works.
2021.02.19
JavaScript/TypeScript
Other techs

How do computers identify the destination

Internet is most important service today. Digital information is shared over the internet and we can search what we want...
2021.02.18
Other techs
Other techs

Most common Git commands for daily work

This post explains the most used git commands in daily work. If you remember these commands, you can handle most cases.
2021.02.17
Other techs
JavaScript/TypeScript

How to check if an object implements an interface in Typescript

When using Typescript the compiler detects the type error. It supports any data type but it is not recommended to use be...
2021.02.16
JavaScript/TypeScript
JavaScript/TypeScript

How to write Node-RED flow test

Testing the whole Node-RED flow is important but adding test flows is not a good idea. Test stuff should exist only in the test code. This post explains how to write Node-RED flow tests in JavaScript/TypeScript code.
2021.02.15
JavaScript/TypeScript
JavaScript/TypeScript

Replacing a static function by using proxy class

This is 4th post in Become a better and decent programmer series.In the first post, I explained how to extract logic in ...
2021.02.14
JavaScript/TypeScript
JavaScript/TypeScript

Reducing number of conditional clauses by command pattern

This is 3rd post in Become a better and decent programmer series.In the first post, I explained how to extract logic in ...
2021.02.10
JavaScript/TypeScript
JavaScript/TypeScript

How to make code testable

In this post, we created a shopping application which is available on console and refactored it. It has only one class w...
2021.02.03
JavaScript/TypeScript
JavaScript/TypeScript

How to become a better programmer

I hadn't been decent programmer for a long time because I hadn't written unit test. Decent programmer should at least be...
2021.01.20
JavaScript/TypeScript
Docker

Visualizing log info with Fluentd, Elasticsearch and Kibana

Docker writes contents written to stdout and stderr into json formatted log file. If we create a function to write log w...
2021.01.13
Docker
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