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26 lines
598 B
26 lines
598 B
/**
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* Convert number to human readabel scale (color, grade, etc)
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*/
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const scale = (...args) => {
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if (args.length === 1 && typeof args[0] === 'string') {
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const preset = presets[args[0]]
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return presets && scale(...preset)
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}
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const [steps, results] = args
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if (steps.length !== results.length - 1) {
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throw Error('<results> length should be n + 1 for n <steps>.')
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}
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return value => results.slice([steps.findIndex(step => step > value)])[0]
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}
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const presets = {
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coverage: [
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[50, 75, 90, 95], ['red', 'orange', 'EEAA22', '99CC11', 'green']
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]
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}
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module.exports = scale
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