Ruby has magic candy function as Kotlin

README.md

[TOC]

Introduction

Ruby and Kotlin have the same magic candy function!

What's kind of magic candy function?

Kotlin

• apply (also)
• let
• with
• run

Ruby

• tap
• try

How to use

apply vs tap

In the Kotlin

Car.builder().apply {
  name = "Benz"
  speed = 500
  age = 3
}

In the Ruby

Car.new.tap { |car|
  car.name = 'Benz'
  car.speed = 500
  car.age = 3
}

let vs try

In the Kotlin

val msg: String? = "Hello World"

msg?.let {
    tell_other(msg)
    println(msg)
}

In the Ruby

msg.try { |it|
  tell_other(it)
  p it
}

# or in Hash or Object
h = {name: 'jieyi', address: nil}

h.try(:address) { |addr|
  p addr
}

*** Note: let & try are the same function. try will return the instruction of the end block line.