18 lines
428 B
JavaScript
18 lines
428 B
JavaScript
'use strict';
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const pipe = (...fns) => fns.length === 1 ? fns[0].constructor === Function ? fns[0]() : fns[0] : fns.reduce((v, f, i) => {
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if (i === 1 && v && v.constructor === Function) {
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let exec = v();
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if (exec && exec.then) {
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return exec.then(v => f(v));
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} else {
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return f(exec);
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}
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} else if (v && v.then) {
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return v.then(v => f(v));
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} else {
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return f(v);
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}
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});
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module.exports = pipe; |