| 1 | /**
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| 2 | * lodash 4.0.1 (Custom Build) <https://lodash.com/>
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| 3 | * Build: `lodash modularize exports="npm" -o ./`
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| 4 | * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
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| 5 | * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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| 6 | * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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| 7 | * Available under MIT license <https://lodash.com/license>
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| 8 | */
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| 9 |
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| 10 | /** `Object#toString` result references. */
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| 11 | var stringTag = '[object String]';
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| 12 |
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| 13 | /** Used for built-in method references. */
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| 14 | var objectProto = Object.prototype;
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| 15 |
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| 16 | /**
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| 17 | * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
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| 18 | * of values.
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| 19 | */
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| 20 | var objectToString = objectProto.toString;
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| 21 |
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| 22 | /**
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| 23 | * Checks if `value` is classified as an `Array` object.
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| 24 | *
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| 25 | * @static
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| 26 | * @memberOf _
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| 27 | * @type Function
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| 28 | * @category Lang
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| 29 | * @param {*} value The value to check.
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| 30 | * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
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| 31 | * @example
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| 32 | *
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| 33 | * _.isArray([1, 2, 3]);
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| 34 | * // => true
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| 35 | *
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| 36 | * _.isArray(document.body.children);
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| 37 | * // => false
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| 38 | *
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| 39 | * _.isArray('abc');
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| 40 | * // => false
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| 41 | *
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| 42 | * _.isArray(_.noop);
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| 43 | * // => false
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| 44 | */
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| 45 | var isArray = Array.isArray;
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| 46 |
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| 47 | /**
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| 48 | * Checks if `value` is object-like. A value is object-like if it's not `null`
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| 49 | * and has a `typeof` result of "object".
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| 50 | *
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| 51 | * @static
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| 52 | * @memberOf _
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| 53 | * @category Lang
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| 54 | * @param {*} value The value to check.
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| 55 | * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
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| 56 | * @example
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| 57 | *
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| 58 | * _.isObjectLike({});
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| 59 | * // => true
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| 60 | *
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| 61 | * _.isObjectLike([1, 2, 3]);
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| 62 | * // => true
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| 63 | *
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| 64 | * _.isObjectLike(_.noop);
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| 65 | * // => false
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| 66 | *
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| 67 | * _.isObjectLike(null);
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| 68 | * // => false
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| 69 | */
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| 70 | function isObjectLike(value) {
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| 71 | return !!value && typeof value == 'object';
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| 72 | }
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| 73 |
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| 74 | /**
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| 75 | * Checks if `value` is classified as a `String` primitive or object.
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| 76 | *
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| 77 | * @static
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| 78 | * @memberOf _
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| 79 | * @category Lang
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| 80 | * @param {*} value The value to check.
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| 81 | * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
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| 82 | * @example
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| 83 | *
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| 84 | * _.isString('abc');
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| 85 | * // => true
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| 86 | *
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| 87 | * _.isString(1);
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| 88 | * // => false
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| 89 | */
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| 90 | function isString(value) {
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| 91 | return typeof value == 'string' ||
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| 92 | (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
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| 93 | }
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| 94 |
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| 95 | module.exports = isString;
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