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1 | var baseGetTag = require('./_baseGetTag'),
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2 | isObjectLike = require('./isObjectLike');
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3 |
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4 | /** `Object#toString` result references. */
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5 | var numberTag = '[object Number]';
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6 |
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7 | /**
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8 | * Checks if `value` is classified as a `Number` primitive or object.
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9 | *
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10 | * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
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11 | * classified as numbers, use the `_.isFinite` method.
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12 | *
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13 | * @static
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14 | * @memberOf _
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15 | * @since 0.1.0
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16 | * @category Lang
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17 | * @param {*} value The value to check.
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18 | * @returns {boolean} Returns `true` if `value` is a number, else `false`.
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19 | * @example
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20 | *
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21 | * _.isNumber(3);
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22 | * // => true
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23 | *
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24 | * _.isNumber(Number.MIN_VALUE);
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25 | * // => true
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26 | *
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27 | * _.isNumber(Infinity);
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28 | * // => true
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29 | *
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30 | * _.isNumber('3');
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31 | * // => false
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32 | */
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33 | function isNumber(value) {
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34 | return typeof value == 'number' ||
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35 | (isObjectLike(value) && baseGetTag(value) == numberTag);
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36 | }
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37 |
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38 | module.exports = isNumber;
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