JavaScript/TypeScriptJavaScript replaceAll multiple characters and strings
replaceAll was added to ECMAScript2021. The same thing can be done with replace function but the name is clearer for the...
JavaScript/TypeScript
Dart and FlutterLearn 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.
JavaScript/TypeScriptNode.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.
Dart and FlutterFlutter 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.
Dart and FlutterFlutter 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.
Dart and FlutterFlutter 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.
GolangGolang 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.
GolangGolang 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.
GolangGolang 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.
PythonPython 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.
