Switch/Case

You can easily handle a state depending on its current value using Sandstone's built-in switch/case.

Syntax

const state = Variable()

// ...

_.switch(state, _
  .case(0, () => {
    say('Handling for first state')
  })
  .case(1, () => {
    say('Handling for second state')
  })
  .case(2, () => {
    say('Handling for third state')
  })
  .default(() => _.throw(['Unexpected state! ', state]))
)

As you can see, this is fairly similar to the traditional switch/case syntax in common languages.

Switching on an NBT value

const item = Data('entity', '@s', 'Inventory[0].Enchantments[0].id')

_.switch(item, _
  .case('minecraft:sharpness', () => say('ouch!'))
  .case('minecraft:knockback', () => say('woah!'))
  .default(() => say('phew!'))
)