Technical Feeder

Learn implementation of Disjoint-set (Union Find) in Dart

Disjoint-set is one of the Data Structures. It's useful to merge two elements and check whether an element is in the same group as another element. Let's learn how it work and how to implement it.

2023.04.24

Dart and Flutter

Node.js + C# (Edge.js) How to investigate Memory Leak

It's hard to find the root cause when we find a memory leak in software. If you have no clue, it's better to start profiling the code. A tool helps the investigation.

2023.04.21

JavaScript/TypeScriptTips

Flutter How to implement Bloc like pattern with Riverpod

Do you want to move from Bloc pattern with flutter_bloc to Riverpod? Then, let's go through with me. I implemented the same application in both.

2023.04.19

Dart and Flutter

Flutter Separate UI and business Logic by Bloc Pattern

Code segregation is important for clean code. UI part should be separated from Business Logic. Bloc pattern is one of the solutions in Flutter. Let's learn how to implement it.

2023.04.17

Dart and Flutter

Flutter Freezed autogenerates code for copyWith, serialization, and equal

Some methods need to be overridden for a data class to copy, compare, and convert from/to JSON. Freezed package auto generates those codes from a simple class definition. Let's try to use it.

2023.04.14

Dart and Flutter

Golang Don’t pass a value to a callback in a loop with range

If a value is passed to a callback in a loop with range keyword, it can introduce a bug. The desired value is not used in the callback if it is triggered later. You should know how to work range keyword in this post.

2023.04.12

Golang

Golang How to extract the desired data from a string by regex

How can we implement it to extract values from a string? Using a regular expression is the right approach for it. Compile regex string and find string submatch.

2023.04.10

Golang

Golang How to define enum and understand how iota works

What is the best practice to define enum in Golang? Use iota for enum and define String() func.

2023.04.07

Golang

Python How to run another Python script with arguments

Another Python script can be run by exec function. However, arguments can't be specified with it. How is it implemented? Okay, use subprocess.call or subprocess.run instead.

2023.04.05

Python

Git How to create/remove branches in Local and Remote repository

There are some branches that are no longer needed. Then, remove them all at once. Let's use the combination of git branch -d, grep, and xargs.

2023.04.03

Other techs