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Course Introduction：Matching "Arbitrary content up to a certain character" in PHP requires non-greed and forward-looking techniques. 1. Match until the colon can be preg_match('/^(.?):/',$str,$match), where ^ represents the beginning, (.?) non-greedy matches any character,: is the target character; 2. Use preg_match('/^(\D )/',$str,$match) to match the first number, and use preg_match('/^(.?)(?=\s)/',$str,$match); 3. Use forward-looking preg_match('/^(.?)(?=:)/',$str,$match) to avoid consumption of target words

2025-07-13 comment 0  836

Course Introduction：How to match patterns using the keys command? The keys command can search for keys for a specified pattern. The pattern supports wildcards: *: Match any character?: Match a single character [ and ]: Match characters in brackets\: Escape special characters The keys command also supports regular expression matching

2025-04-10 comment 0  956

Course Introduction：match eliminates the unexpected fall-through problem of switch, without breaking; 2.match is an expression, which can directly return values, simplifying assignment and inline use; 3.match uses strict comparison by default (===) to avoid accidents caused by implicit type conversion; 4. In PHP8.3, match supports multi-value matching and complex condition judgment; therefore, if you map value to value and run in PHP8, match should be preferred, which is safer, concise and more expressive.

2025-07-25 comment 0  295

Course Introduction：This tutorial explains how to use MATCH function in Excel with formula examples. It also shows how to improve your lookup formulas by a making dynamic formula with VLOOKUP and MATCH. In Microsoft Excel, there are many different lookup/ref

2025-04-15 comment 0  754

Course Introduction：You can efficiently compare two lists in Excel for matches using the MATCH function, IF function, or by highlighting row differences. Manually searching for differences between two lists can be time-consuming and error-prone, leading to significant t

2025-05-24 comment 0  193

Course Elementary  13826

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

Course Elementary  82370

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

Course Elementary  13185

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.

Course Elementary  24635

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

Course Elementary  27493

Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.