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Development/Design

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Development/Design

[Go] Handling Date type values ​​for nullable DB columns

Three methods for golang to handle values of type date for DB columns that allow null. Allow null with a pointer. sql.NullTime requires a conditional branch via the Valid field to determine null. []When using uint8, convert byte slice -> string -> time.Time object.
2024.05.06
Development/Design
Development/Design

[Flutter] Introducing the Overlay class to display notification messages

I found a package called overlay_support that makes it easy to create toast and in-app notifications, so I'll use this one.OverlaySupportEntry.of(context)? .dismiss(); is a method that removes the displayed overlay widget.
2024.04.21
Development/Design
Development/Design

[Go Memorandum] Static typing, type inference, functions, structures, receivers, Go Modules, Packages, Imports

In Go language, functions begin with the func keyword and require argument and return types (static typing). Type names are written "behind" variable names; Go structures differ from classes in that methods are defined outside of the structure definition, and structures and methods are associated via "receivers".
2024.04.17
Development/Design
Development/Design

[Docker memorandum] DockerFile, docker-compose.yml, Docker command

Docker enables virtualization (running a virtual PC inside a PC) using containers, which are lighter and more efficient than traditional virtual machines. a Docker container is a runtime environment generated from a Docker image. Containers are launched based on images and provide an isolated environment for running applications.
2023.12.22 2024.04.13
Development/Design
Development/Design

[Flutter] State management ②: From provider to Riverpod. Take the counter app as an example.

In the previous article, we described Flutter's state management from statefulWidget + setState to Provider.This time, we will look at Provider to Riverpod, which is context independent and enhances immutability.
2024.04.11 2024.04.13
Development/Design
Development/Design

[Flutter] State Management 1: StatefulWidget + setState to provider. Using a counter app as an example

In Flutter, you can use StatefulWidget to have internal state. In addition, libraries such as Provider, Riverpod, and Bloc are used to manage the state of the entire application.
2024.04.10 2024.04.13
Development/Design
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