48 lines
1.2 KiB
JavaScript
48 lines
1.2 KiB
JavaScript
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var isArguments = require('./isArguments'),
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isArray = require('./isArray'),
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isArrayLike = require('../internal/isArrayLike'),
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isFunction = require('./isFunction'),
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isObjectLike = require('../internal/isObjectLike'),
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isString = require('./isString'),
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keys = require('../object/keys');
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/**
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* Checks if `value` is empty. A value is considered empty unless it is an
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* `arguments` object, array, string, or jQuery-like collection with a length
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* greater than `0` or an object with own enumerable properties.
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*
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* @static
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* @memberOf _
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* @category Lang
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* @param {Array|Object|string} value The value to inspect.
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* @returns {boolean} Returns `true` if `value` is empty, else `false`.
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* @example
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*
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* _.isEmpty(null);
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* // => true
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*
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* _.isEmpty(true);
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* // => true
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*
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* _.isEmpty(1);
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* // => true
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*
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* _.isEmpty([1, 2, 3]);
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* // => false
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*
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* _.isEmpty({ 'a': 1 });
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* // => false
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*/
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function isEmpty(value) {
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if (value == null) {
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return true;
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}
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if (isArrayLike(value) && (isArray(value) || isString(value) || isArguments(value) ||
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(isObjectLike(value) && isFunction(value.splice)))) {
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return !value.length;
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}
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return !keys(value).length;
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}
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module.exports = isEmpty;
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