27 lines
882 B
Plaintext
27 lines
882 B
Plaintext
// Port of Sindre Sorhus' Sparkly to Rescript
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// reference implementation: https://github.com/sindresorhus/sparkly
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// Omitting rgb "fire" style, so no `chalk` dependency
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// Omitting: NaN handling, special consideration for constant data.
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let ticks = [`▁`, `▂`, `▃`, `▄`, `▅`, `▆`, `▇`, `█`]
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let _ticksLength = E.A.length(ticks)
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let _heightToTickIndex = (maximum: float, v: float) => {
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let suggestedTickIndex = Js.Math.ceil_int(v /. maximum *. Belt.Int.toFloat(_ticksLength)) - 1
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max(suggestedTickIndex, 0)
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}
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let create = (relativeHeights: array<float>, ~maximum=?, ()) => {
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if E.A.length(relativeHeights) === 0 {
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""
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} else {
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let maximum = maximum->E.O2.default(E.A.Floats.max(relativeHeights))
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relativeHeights
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->E.A2.fmap(_heightToTickIndex(maximum))
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->E.A2.fmap(r => E.A.get(ticks, r)->E.O2.toExn(""))
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->E.A2.joinWith("")
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}
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}
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