前言 在使用 Laravel 框架进行开发项目的时候,Facades 是一个经常能用到的模块,比如在使用缓存(Cache)、日志(Log) 等组件的地方。 use Illuminate\Support\Facades\Cache; $name = Cache::get('name'); use use Illuminate\Support\Facades\Log; Log::info('this
Count the number of Duplicates Write a function that will return the count of distinct case-insensitive alphabetic characters and numeric digits that occur more than once in the input string.The input string can be assumed to contain only alphanumeric characters, including digits, uppercase and lowercase alphabets. Example "abcde" -> 0 # no characters repeats more than once "aabbcde" -> 2 # 'a' and 'b' "aabbcdeB" -> 2 # 'a' and 'b' "indivisibility" -> 1 #