Programmer Think

Basic syntax of golang 1. Naming rules All naming of function name, variable name, constant name, type name, statement label and package name in go language follow a simple naming rule Must be with a letter or underscore_ Start with any number of letters, numbers, or underscores Upper and lower case letters are considered different in go ...

Why do I need distributed locksUser ordersLock uid to prevent repeated orders.Inventory deductionLock inventory to prevent oversold.Balance deductionLock the account to prevent concurrent operations.When sharing the same resource in a distributed system, distributed locks are often needed to ensure the consistency of change resources.Distribute ...

V Arithmetic operation Logic and 0 && 0 =1 1 && 1 =1 1 && 0 =0 Logical or 0 || 0 =0 0 || 1 =1 1 || 0 =1 1 || 1 =1 Relational operation: the result is also true and false Arithmetic operator + ，- ，* ，/ ，% Self increment: + +, which can only be used for variables and can only be placed later Self ...

In Go language, there are not only easy-to-use and advanced synchronization mechanisms such as channel, but also sync Mutex ,sync.WaitGroup and others compare the original synchronization mechanism. Through them, we can more flexibly control data synchronization and multi process concurrency. Resource competition In a goroutine, if the alloca ...

Why do I need distributed locks User orders Lock uid to prevent repeated orders. Inventory deduction Lock inventory to prevent oversold. Balance deduction Lock the account to prevent concurrent operations. When sharing the same resource in a distributed system, distributed locks are often needed to ensure the consistency of ...

brief introduction In development, we may encounter the need to invoke scripts in the program, or involve the interaction between two languages. The author met the need to call Python in go before, and then applied the go-python3 Library in the code. Actually, calling the script of Python in go is also a solution. This article will introduce ...

prefaceAnonymous behavior is very common in go language, such as:Anonymous function: that is, what we know as closureAnonymous fields in structureAnonymous structuresThe design of anonymous behavior brings some difficulties in understanding, but after you are familiar with the use of anonymous design, you will find that anonymous design can hel ...

String The go standard library builtin defines all built-in types. The source code is located in Src / builtin / builtin go string is a collection of 8-bit bytesUsually, but not necessarily, UTF-8 encoded text.In addition, two important points were mentioned: string can be null (length 0), but not nilstring object cannot be modified ...

Author: Regan YueSource: Hang Seng LIGHT cloud communityGo language learning checking and patching Day7Zero. PrefaceBecause I have a weak foundation, I often encounter a lot of confused problems when using Go language, so I am determined to check and fill in the gaps in Go language. This [Go language checking and filling in] series is mainly to ...

As a non professional self-taught wild programmer, it's really silly to just come into contact with bit operation, but it's not so mysterious after being familiar with it. It's often used when watching some excellent open source projects or custom network protocol encapsulation. Recently, I saw a good article on bit operation by foreigners. So ...