45 lines
1.3 KiB
Plaintext
45 lines
1.3 KiB
Plaintext
// Port of Sindre Sorhus' Sparkly to Rescript
|
|
// reference implementation: https://github.com/sindresorhus/sparkly
|
|
// Omitting rgb "fire" style, so no `chalk` dependency
|
|
|
|
type sparklyConfig = {
|
|
minimum: option<float>,
|
|
maximum: option<float>
|
|
}
|
|
|
|
let sparkly = (
|
|
numbers: array<float>,
|
|
~options = {minimum: None, maximum: None}
|
|
) => {
|
|
// if not numbers is not an array, throw typeerror "Expected an array"
|
|
|
|
// Unlike reference impl, we assume that all numbers are finite, i.e. no NaN.
|
|
let ticks = [`▁`, `▂`, `▃`, `▄`, `▅`, `▆`, `▇`, `█`]
|
|
|
|
let minimum = E.O.default(Js.Math.minMany_float(numbers), options.minimum)
|
|
let maximum = E.O.default(Js.Math.maxMany_float(numbers), options.maximum)
|
|
// Use a high tick if data is constant and max is not equal
|
|
let ticks = if minimum == maximum && maximum != 0.0 {
|
|
[ticks[4]]
|
|
} else {
|
|
ticks
|
|
}
|
|
|
|
let toMapWith = (number: float) => {
|
|
let ret = {
|
|
let tickIndex = Js.Math.ceil_int((number /. maximum) *. Belt.Int.toFloat(Belt.Array.length(ticks))) - 1
|
|
|
|
let tickIndex = if maximum == 0.0 || tickIndex < 0 {
|
|
0
|
|
} else {
|
|
tickIndex
|
|
}
|
|
ticks[tickIndex]
|
|
}
|
|
ret
|
|
}
|
|
let ret = Belt.Array.map(numbers, toMapWith)
|
|
// Belt.Array.reduce(ret, "", (x, y) => x ++ y)
|
|
Js.Array.joinWith("", ret)
|
|
}
|