<span>filter()</span> is a built-in high-order function in Python used to filter sequences, removing elements that do not meet the specified conditions, and returning an iterator object (returns a list in Python 2.x and an iterator in Python 3.x). Basic Syntax filter(function, iterable) How It Works <span>filter()</span> takes each element in <span>iterable</span> as an argument to … Read more
Learn Excel techniques by following our WeChat public account:excelperfect Tags:PythonandExcel Now,Excel has integrated Python, which means you can use Python to implement more flexible and powerful Excel solutions. In the worksheet cell, just like entering a formula, type: =py Press the Tab key, and a Python cell will be created, as shown in the following … Read more
Loop structures are a type of structure that controls the execution flow of a program, allowing for the repeated execution of a block of code until a specific condition is met.Python provides two main types of loops: for loops and while loops. Types of Loops in Python Loop Type Syntax Applicable Scenarios for loop for … Read more
【Problem】Given 4 billion unique unsigned int integers that are not sorted. Given a number, how can we quickly determine if this number exists among those 4 billion numbers? 1 billion is 9 zeros, so 4 billion is 4000000000. Our instinctive thought for a solution is to use a for loop to find the equal number, … Read more
Commands to Configure System Process Threads to Specific CPUs # View the CPU core bound to the current process, dynamically modify during process execution taskset -p pid # Specify which CPU IDs the current process can use, use during command execution taskset -c 0,1 cmd # View the correspondence between system CPUs (logical cores) and … Read more
IntroductionAs a developer, have you ever encountered a situation where you configured your application to automatically restart after a crash, but the service just won’t come back up? The logs only show a cold <span>status=217/USER</span>, leaving you puzzled? Don’t panic! Today, we will provide a hands-on guide to help you solve the “mystical” issue of … Read more
In China, there is a saying – “Since you are here, you might as well enjoy it!”Seeing beautiful scenery on TV, with green mountains and clear waters, and cascading waterfalls, one might impulsively drive to the destination. Upon arrival, they realize that it was the camera that was beautiful, not the scenery. But since they … Read more
Abstract: It is a command-line utility used to list information about files opened by various processes. In Linux, everything is a file (pipes, sockets, directories, devices, etc.). Therefore, by using lsof, you can obtain information about any open file. lsof stands for ‘list open files’. If you think of the lsof command as ‘ls + … Read more
The Future of Rust Code in the Linux Kernel: Progress Amid Controversy Introduction Since the first integration of Rust code into the Linux kernel in 2022, the controversy surrounding its introduction has never ceased. The Rust language is praised for its excellent memory safety features and is seen by many governments and security experts as … Read more
In today’s rapidly accelerating digital transformation, the Linux operating system, as the mainstream OS for servers and edge computing devices, directly impacts the protection of enterprise data assets and user privacy. This guide will present a practical security hardening solution from the core dimensions of security reinforcement, combined with code examples, focusing on two key … Read more