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Last change
on this file since d24f17c was d24f17c, checked in by Aleksandar Panovski <apano77@…>, 15 months ago |
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| 1 | import { both, complement, curryN } from 'ramda';
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| 2 | import isInteger from './isInteger';
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| 3 | import isNegative from './isNegative';
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| 4 |
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| 5 | /**
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| 6 | * Checks if value is a natural number.
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| 7 | * Natural numbers correspond to all non-negative integers and 0.
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| 8 | *
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| 9 | * @func isNaturalNumber
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| 10 | * @memberOf RA
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| 11 | * @since {@link https://char0n.github.io/ramda-adjunct/2.29.0|v2.29.0}
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| 12 | * @category Type
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| 13 | * @sig * -> Boolean
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| 14 | * @param {*} val The value to test
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| 15 | * @return {boolean}
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| 16 | * @example
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| 17 | *
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| 18 | * RA.isNaturalNumber(5); // => true
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| 19 | * RA.isNaturalNumber(Number.MAX_VALUE); // => true
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| 20 | * RA.isNaturalNumber(0); // => true
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| 21 | * RA.isNaturalNumber(-1); // => false
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| 22 | * RA.isNaturalNumber(0.9); // => false
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| 23 | */
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| 24 |
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| 25 | var isNaturalNumber = curryN(1, both(isInteger, complement(isNegative)));
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| 26 | export default isNaturalNumber; |
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