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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 | 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 23x 23x 23x 23x 8x 23x 23x 10x 10x 10x 10x 10x | /** * @license Apache-2.0 * * Copyright (c) 2018 The Stdlib Authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ 'use strict'; // MODULES // var lowercase = require( '@stdlib/string/lowercase' ); var uppercase = require( '@stdlib/string/uppercase' ); var isString = require( '@stdlib/assert/is-string' ).isPrimitive; // MAIN // /** * Tests if a value is a lowercase string. * * @param {*} value - value to test * @returns {boolean} boolean indicating whether value is a lowercase string * * @example * var bool = isLowercase( 'salt and light' ); * // returns true * * @example * var bool = isLowercase( 'HELLO' ); * // returns false * * @example * var bool = isLowercase( 'World' ); * // returns false * * @example * var bool = isLowercase( '!' ); * // returns false */ function isLowercase( value ) { return ( isString( value ) && value === lowercase( value ) && value !== uppercase( value ) ); } // EXPORTS // module.exports = isLowercase; |