Category: Programming Language
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Post Views: 49 In the official tutorial of Go language, Web Crawler practice is a very classic concurrent programming case. It requires us to modify a basic recursive crawler so that it can crawl the URL in parallel, while ensuring that the same URL is not repeated. This article will take you to analyze the original code problem step by…
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Post Views: 79 1. Reference:Optimization of List Interface Response Timeout 2. Reference:In Spatie\QueryBuilder, query SQL enforces index 3. However, when the fields in where contain shipping_at_gmt, Shipping_status, operator_user_id, after forcing the combined index is a negative optimization. SQL execution time-consuming sorting is as follows 4. Preliminarily summarize the rules, when the fields in where contain Shipping_at_gmt and Shipping_Status|Shipping_Type|Operated_Source When the…
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Post Views: 102 Preface In most programming languages, it is quite complex to check if two binary trees store the same sequence of values. It is usually necessary to write a recursive algorithm to traverse the two trees and then compare them by node. But in the Go language, we can use its powerful concurrent primitives and channel (channel) mechanisms…
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Post Views: 66 In the previous Go concurrency review, I focused on the many drawbacks of ‘global variable lock synchronization’ through factorial cases, especially the core question of ‘there are still hidden dangers when adding locks and hibernation’ Question – Manually set the sleep time to accurately match the rhythm of the execution of the protocol. If the resource is…
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Post Views: 45 In Go language concurrent programming, channel (pipe) is the core mechanism of communication between goroutines, which follows The design philosophy of communicating to share memory, rather than communicating through shared memory, fundamentally solves many hidden dangers of global variable lock synchronization. In the previous study, we understood the necessity of the channel through the factorial case. This…
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Post Views: 94 In Go language concurrent programming, goroutine is the core of efficient concurrency, but the communication and synchronization between multiple goroutines is often a place for beginners to easily step on pits. This article will take ‘calculate the factorials of 1-200 and store them into Map’ as a case, and combine the problems encountered in the learning process,…
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Post Views: 30 As the core feature of the Go language, Goroutine is the key to lightweight concurrency. It is lighter than traditional operating system threads and has lower creation cost. The default initial stack is only 2KB and supports dynamic expansion, which allows developers to easily achieve high concurrency programming. For beginners who are new to Go concurrency, understanding…
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Post Views: 41 Interpret t Any constraint: Allows storage of any type.Explain the pointer structure of a unidirectional linked list.Constructor new:Shows how to initialize a generic node.
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Post Views: 41 The background of the problem 2. The first pit: depend on download failure (502 bad gateway), you can refer to:GO TOUR slicing exercise to run the full record of the pit on the pit (from error report to successful operation) as shown in Figure 1 Error message: Error cause: Solution: 3. The second pit: the IDE still…