GT2/GT2-iOS/node_modules/lodash-es/size.js

47 lines
1.1 KiB
JavaScript

import baseKeys from './_baseKeys.js';
import getTag from './_getTag.js';
import isArrayLike from './isArrayLike.js';
import isString from './isString.js';
import stringSize from './_stringSize.js';
/** `Object#toString` result references. */
var mapTag = '[object Map]',
setTag = '[object Set]';
/**
* Gets the size of `collection` by returning its length for array-like
* values or the number of own enumerable string keyed properties for objects.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object|string} collection The collection to inspect.
* @returns {number} Returns the collection size.
* @example
*
* _.size([1, 2, 3]);
* // => 3
*
* _.size({ 'a': 1, 'b': 2 });
* // => 2
*
* _.size('pebbles');
* // => 7
*/
function size(collection) {
if (collection == null) {
return 0;
}
if (isArrayLike(collection)) {
return isString(collection) ? stringSize(collection) : collection.length;
}
var tag = getTag(collection);
if (tag == mapTag || tag == setTag) {
return collection.size;
}
return baseKeys(collection).length;
}
export default size;