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- var baseKeys = require('./_baseKeys'),
- getTag = require('./_getTag'),
- isArrayLike = require('./isArrayLike'),
- isString = require('./isString'),
- stringSize = require('./_stringSize');
- var mapTag = '[object Map]',
- setTag = '[object Set]';
- 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;
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