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Merge pull request moment#3571 from captbaritone:is-number
[misc] Introduce isNumber function
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export default function isNumber(input) { | ||
return typeof value === 'number' || Object.prototype.toString.call(input) === '[object Number]'; | ||
} |
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import { module, test } from '../qunit'; | ||
import isNumber from '../../lib/utils/is-number.js'; | ||
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test('isNumber recognizes numbers', function (assert) { | ||
assert.ok(isNumber(1), 'simple integer'); | ||
assert.ok(isNumber(0), 'simple number'); | ||
assert.ok(isNumber(-0), 'silly number'); | ||
assert.ok(isNumber(1010010293029), 'large number'); | ||
assert.ok(isNumber(Infinity), 'largest number'); | ||
assert.ok(isNumber(-Infinity), 'smallest number'); | ||
assert.ok(isNumber(NaN), 'not number'); | ||
assert.ok(isNumber(1.100393830000), 'decimal numbers'); | ||
assert.ok(isNumber(Math.LN2), 'natural log of two'); | ||
assert.ok(isNumber(Math.PI), 'delicious number'); | ||
assert.ok(isNumber(5e10), 'scientifically notated number'); | ||
assert.ok(isNumber(new Number(1)), 'number primitive wrapped in an object'); // jshint ignore:line | ||
}); | ||
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test('isNumber rejects non-numbers', function (assert) { | ||
assert.ok(!isNumber(), 'nothing'); | ||
assert.ok(!isNumber(undefined), 'undefined'); | ||
assert.ok(!isNumber(null), 'null'); | ||
assert.ok(!isNumber([1]), 'array'); | ||
assert.ok(!isNumber('[1,2,3]'), 'string'); | ||
assert.ok(!isNumber(new Date()), 'date'); | ||
assert.ok(!isNumber({a:1,b:2}), 'object'); | ||
}); |