You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
1.1 KiB
46 lines
1.1 KiB
var baseKeys = require('./_baseKeys'), |
|
getTag = require('./_getTag'), |
|
isArrayLike = require('./isArrayLike'), |
|
isString = require('./isString'), |
|
stringSize = require('./_stringSize'); |
|
|
|
/** `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; |
|
} |
|
|
|
module.exports = size;
|
|
|