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23 lines
654 B
JavaScript
23 lines
654 B
JavaScript
/**
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* Composes single-argument functions from right to left. The rightmost
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* function can take multiple arguments as it provides the signature for
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* the resulting composite function.
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*
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* @param {...Function} funcs The functions to compose.
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* @returns {Function} A function obtained by composing the argument functions
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* from right to left. For example, compose(f, g, h) is identical to doing
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* (...args) => f(g(h(...args))).
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*/
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export default function compose(...funcs) {
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if (funcs.length === 0) {
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return (arg) => arg
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}
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if (funcs.length === 1) {
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return funcs[0]
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}
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return funcs.reduce((a, b) => (...args) => a(b(...args)))
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}
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