clean code ebook

this class, and can be called in more places.6. Single entry of Function pointIn code, some functional logic is relatively fixed, but in many places it repeats itself.For example, the login function, in addition to user active login, and in the non-logged in state to use some of the features required to log in, will call the login page. I looked at the current code, and there were 14 calls to the login pag

How do I clean up the previously cached opcode when the online PHP code is updated? Reply content: How do I clean up the previously cached opcode when the online PHP code is updated? opcache.validate_timestampsDefault isOFF Opcache sets the number of seconds per opcache.revalidate_freq to check if the scrip

code is short enough, the coupling degree is 2. Refactoring: In the process of writing code in time to refactor, keep the code elegant 3. Non-repeatable: existing code to use , de-duplication 4. Strong expression: This should be a goal or result, do a good job in front of the work can naturally reach 13, concurrent pr

-----------------------Chapter1: Neat code----------------------1, "C + +" programming language author--c++ 's father Bjarne Stroustrup for the definition of neat code:I like the elegant and efficient code. The code logic should be straightforward, it is difficult to conceal the defect, reduce the dependency relationship, make it easy to maintain; Move to some so

To keep software systems clean at the system level, appropriate abstract levels and modules must be developed for the system. An effective method is to separate the construction and use of the system, because the construction and use are very different processes. The software system should split the START process and the runtime logic after the START process. If the application objects are constructed during the START process, there will be tangle dep

circumstances. Because Oracle defines "unchecked exception for unrecoverable or unexpected errors, exceptions"2. However, checked exception does violate the OCP principle, (if a checked exception is thrown in the system's underlying code, the compiler will force each method that calls the method to catch or declare a throw.) ）And I'm going to think about it .....Don ' t Return Nulldon ' t Pass NullInstead of returning null in the

The parameters of the del command/F Forces a read-only file to be deleted./s Deletes the specified file from all subdirectories./q Quiet mode. Confirmation is not required when global wildcard characters are deleted. Parameters for Rd Command/s In addition to the directory itself, all subdirectories and files under the specified directory are also deleted. Used to delete a directory tree./q Quiet mode/s does not require confirmation when deleting a tree. C