Specification
Style guide
Techniques
Installation
Tutorial
CONTRIBUTE
Singleton
Purpose
Sometimes, when we are creating libraries for other users, we might want to group similar functions together to improve user experience.
Example
Suppose we are creating a library that allow the user to access the file system. And we wish that our code looks like this:
1
=fs.open("Hello world.txt")
Copied!
1
FileSystem = choice.new
Copied!
Then, create a constant alias:
1
fs = FileSystem.new
Copied!
After that, we can proceed to define the functions we intend to expose:
1
(this FileSystem).open(filename String) = undefined
2
(this FileSystem).rename(oldname String) as(newname String) = undefined
3
(this FileSystem).delete(filename String) = undefined
Copied!
And the client can use them as follows:
1
=fs.open("Hello world.txt")
2
=fs.rename("Jojo.md") as("Koko.md")
3
=fs.delete("/")
Copied!