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22 lines
387 B
JavaScript
22 lines
387 B
JavaScript
'use strict';
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const success = (a) => [null, a];
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const fail = (a) => [a];
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const noArg = (f, a) => () => f(...a);
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module.exports = (fn, ...args) => {
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check(fn);
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return Promise.resolve()
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.then(noArg(fn, args))
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.then(success)
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.catch(fail);
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};
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function check(fn) {
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if (typeof fn !== 'function')
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throw Error('fn should be a function!');
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}
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