Programmer Help

Exercise notes Recurrence Code: index.php <?php require 'config.php'; if(isset($_REQUEST['username'])){ if(preg_match("/(?:\w*)\W*?[a-z].*(R|ELECT|OIN|NTO|HERE|NION)/i", $_REQUEST['username'])){ die("Attack detected!!!"); } } if(isset($_REQUEST['password'])){ if(preg_match( ...

Operator '= =' and object's equals() method brief introduction The operator "= =" compares whether the two operands are equal. The two operands can be either basic type or reference type. For example > int a1=1,a2=3; > boolean b1=a1==a2;//The operand of "= =" is of basic ...

Dead work1. Reading raft paper2. Reading raft Theory and Practice [1] - Theory Paper3. Reading raft Theory and Practice [2]-lab2a4. Reading raft theory and practice [3]-lab2a explanation5. Check out this article I wrote: Simulate RPC remote procedure calls Execution Log We need to execute the commands in the log, so in the make function, we ha ...

As we know, String is a read-only String. Once the referenced String is defined, it cannot be modified. Splicing or intercepting a String will create a new String object. If you need to make a lot of changes to the String, the performance of using String is extremely low. As an example, String is splice ...

1. Usage: provide: Used in ancestor components; a value is an object or a function that returns an object; inject: Used in descendant components; value is an array of keys or an object in the provider object whose key value is the local binding name and value is the key or an object in the provider object: {from:'key in the p ...