Tag：pattern matching
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Why is rust the most popular language for stack overflow?
Reddit recently launched a discussion: why do you like rust? How to persuade others to use rust? There are several answers: Cargo, pattern matching, iterator, fearless concurrency, rayon, traits system, performance; The installation under windows is very convenient, high-performance, cargo, usually more effective compilation error prompt, enums and pattern matching, memory security, and declarative programming […]
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Development tool – Scala sharp tool for processing JSON format – json4s
1. Why json4s Official description from json4s At this moment there are at least 6 json libraries for scala, not counting the java json libraries. All these libraries have a very similar AST. This project aims to provide a single AST to be used by other scala json libraries. At this moment the approach taken […]
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String Library in Lua and powerful pattern matching learning notes
The processing ability of lua native interpreter to string is very limited. The powerful string operation ability comes from the string library. Lua’s string function is exported in string module. In lua5 1. At the same time, it is also a member method of string type. Therefore, we can write it as string Upper (s), […]
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New c# high efficiency Programming Guide
preface From version 7 to version 9, C # has added many features, including improvements in performance, program robustness, code simplicity and readability. Here I sort out some personal recommended writing methods when using the new version of C # that may not be applicable to everyone, but I still hope to help you. Note: […]
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Rust – helloworld
notice Rust hasn’t reached 1.0 yet. The development is fast. Please see the official documents Rust is a programming language that focuses on type safety, memory safety, concurrency, and performance. It is designed to write large-scale and high-performance software. As a multi paradigm language, rust supports functional, procedural and object-oriented programming styles. The advanced features […]
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Rust data structure
notice Rust hasn’t reached 1.0 yet. The development is fast. Please see the official documents Structs Rust structures can usestruct Name { field1: T1, field2: T2 [, …] }Formal declaration of. T1 and T2 represent types. Similar syntax is used to instantiate a struct. There is no struct keyword, such asPoint { x: 1.0, y: […]
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Study notes on pattern matching in Perl
1、 IntroductionA pattern refers to a specific sequence of characters found in a string. The backslash contains: / def /, that is, the pattern def. For example, the string is divided into multiple words in a certain pattern in combination with the function split: @ array = split (/ /, $line); 2、 Matching operators = […]
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Heavy! With the release of JDK 17, Oracle announced that JDK 17 is officially free..
Previous edition:JDK 16 was officially released and 17 new features were released at one time… No! JDK 17 officially released + free It’s awesome. JDK 16 has just been released for half a year (2021 / 03 / 16), and JDK 17 arrives as scheduled (2021 / 09 / 14). At this time, it’s awesome. […]
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Using preg in PHP_ match_ All matches the pictures in the article
preg_ match_ All function: int preg_ match_ All (string pattern, string subject, array matches [, int flags]) performs a global regular expression matchSearch the subject for all the contents that match the regular expression given by pattern, and put the results into matches in the order specified by flags.After the first match is found, the […]
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Detailed explanation of two methods of regular pattern matching in openresty
preface This article introducesOpenRestyTwo kinds ofregularpattern matching。 First of all, the openresty suite contains two kinds of syntax: one is the openresty syntax mainly based on the FFI API, and the other is the syntax similar to the native Lua scripting language. In the content introduced in this article, the regular pattern matching corresponding to […]
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Detailed explanation of c#9.0 new features Series 6: enhanced pattern matching
Since C #7.0, pattern matching has been evolving as an important new feature of C # continuously. Drawing lessons from the concept of functional programming of his younger brother f #, C # has more and more abilities. C #9.0 has further enhanced the function of pattern matching. In order to have a more in-depth […]
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New feature of c# 9 — enhanced pattern matching
New feature of c# 9 — enhanced pattern matching Intro The usage of pattern matching is further enhanced in c# 9, which makes pattern matching more powerful. Let’s take a look Sample The usage of pattern matching is enhanced in c# 9, andand/or/notOperator, and you can directly judge attributes. Take the following example: var person […]