The evaluation strategy of a compiler is usually divided into pass-by-call and pass-by-call. Thunk functions are implemented by pass-by-call by the compiler. They often put parameters into a temporary function and then put This temporary function is passed into the function body. This temporary function is called the Thunk function. Evaluation strategy Compiler evaluation strategies are usually divided… Read More »
String is an elementary and essential class in the Java language, which provides various basic logic for constructing and managing strings. It is a typical Immutable class, declared as a fnal class, and all attributes are also fnal. Because of its immutability, actions such as stitching and cutting strings will generate new String objects. Due to the universality… Read More »
For the record, this article does not use the openpyx package. The xlrd and xlwt packages are used. Although the functions of these two libraries cannot be compared with openpyx, they can operate the old version of excel with the extension like xls which openpyx does not support. The general idea is as follows. Traverse to get all… Read More »
Generally, RPC is based on the C/S structure. The RPC server corresponds to the network server, and the RPC client corresponds to the network client. However, for some unique scenarios, such as providing an RPC service on the company’s intranet, but unable to connect to the intranet’s server on the external network. At this time, we can refer… Read More »
The following script is to catch dead links (return 404 HTTP status code) under a domain name. Depth-first Search (DFS) After getting the root path, first, take out all the sub-paths, and use urllib to verify these paths. If the verification fails, record them, otherwise use the sub-path as the root path to traverse its sub-paths. Breadth-First Search… Read More »
Blue/green deployment is to keep the old version, deploy the new version, then test, confirm and cut the traffic to the latest version, and then, the old version is also upgraded to the latest version. Canary deployment is to choose to deploy a new version, introduce some traffic to the latest version, and the new and old versions… Read More »
Introduction Access control is to provide a set of methods to identify, organize, and host all functions in the system, organize, and identify all data, and then offer a unique and straightforward interface. One end of this interface is the application. At one end of the system is the permission engine. The permission engine only answers: Does anyone… Read More »