Scripts/Rainbow/rainbow.js

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JavaScript
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2024-02-03 15:14:16 -04:00
// Approximate racket functions
function circle(color) {
print(`${color} circle`)
}
function square(color) {
print(`${color} square`)
}
function print(shape) {
console.log(shape)
}
// Cuz javascript doesn't have functional primitives
function first(list) {
return list[0]
}
function rest(list) {
return list.slice(1)
}
// Helper to cycle through the functions
function cycle(list) {
return rest(list).concat(first(list))
}
// The actual function
function rainbow(...functions) {
let colors = ['red', 'orange', 'yellow', 'green', 'blue', 'indigo', 'violet']
function rainbowRecursive(functions, colors) {
if (colors.length === 0) {
return
}
first(functions)(first(colors))
rainbowRecursive(cycle(functions), rest(colors))
}
rainbowRecursive(functions, colors)
}
rainbow(circle, square)