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387 BJavaScriptView Raw
1'use strict';
2
3var isNumber = require('./number');
4
5/**
6 * Checks whether a value is a negative number
7 *
8 * @function negative
9 *
10 * @example
11 * var is = require('predicates');
12 *
13 * is.negative(-1); // true
14 * is.negative(0); // false
15 *
16 * @param {Number} value
17 * @returns {Boolean}
18 */
19module.exports = function isNegativeNumber(value) {
20 return isNumber(value) && value < 0;
21};