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[Java] Android Saving/reading files to internal storage

3 minute read

Introduction Hello. I will start writing articles from today. I will use Qiita as a programming memo. I have been using Android for about 2 years. I am a gr...

[Ruby] Well, let’s preview the image. ~part5~

3 minute read

Assumption Use ruby on rails 6.0.0. User functions are assumed to be introduced by devise. All view files are in haml format. By the way, I use Mac...

[Java] TDD Barely #3 (July 15th, 2020)

less than 1 minute read

New knowledge static You can access the variable without instantiating the class that contains static. This variable is called a static variable or class va...

[Ruby] Object-oriented programming terminology

less than 1 minute read

class ・Type of data ・Alias: “Object blueprint” “Object template” If the classes are the same, the held attributes (data items) and usable methods are the...

[Java] Java marks PPT document as final state

less than 1 minute read

After designing and creating a PPT document, if you want to indicate that the document has reached its final design state and nobody wants to edit and chang...

[Ruby] initialize method

less than 1 minute read

initialize method Method called when creating an object from a class

[Ruby] How to use rbenv

1 minute read

In order to proceed with learning by purchasing Junichi Ito’s introduction to Ruby I needed to change the version of Ruby, so I looked into rbenv.

[Ruby] Class method

less than 1 minute read

What is a class method? A method that is closely related to the class but does not use the data contained in each instance

[Ruby] About attr_accessor

1 minute read

What is an instance variable? Variables shared within the same instance