Lodash sortedUniq method
语法：
This method is like _.uniq except that it's designed and optimized for sorted arrays.
参数
array (Array) − The array to inspect.
输出：
(Array) − Returns the new duplicate free array.
实例：
var _ = require('lodash');
var list = [1, 2, 2, 2];
var result = _.sortedUniq(list);
console.log(result);
Save the above program in
tester.js. Run the following command to execute this program.
命令：
输出：
