Course Introduction：Using a while loop combined with a PHP generator can efficiently process large-scale data sets to avoid memory overflow; 2. The generator returns data one by one through the yield keyword, and only generates values when needed, significantly reducing memory usage; 3. The while loop provides more refined control compared to foreach, supporting early exit, conditional judgment and runtime logic adjustment; 4. This mode is suitable for scenarios such as large file reading, database result streaming processing, such as reading logs line by line or processing user data in batches; 5. Data filtering, conversion and pipeline processing can be achieved through a combination generator to improve code reusability and flexibility; 6. This method has the advantages of low memory consumption, support early termination, and integrated current limiting mechanisms. It is an ideal for handling unlimited or massive data streams.
2025-08-08 comment 0 456
Course Introduction：Reasons for more efficient processing of data with Stream include memory savings, performance improvements, and support for asynchronous processing. 1. Save memory: avoid loading all data at once through blocking processing; 2. Improve performance: handle read and write operations in parallel; 3. Support asynchronous processing: suitable for non-blocking I/O operations. In the example, the file is read block by block through the Readable stream, and the Writable stream is written to the target file after being converted by the Transform stream. The entire process is low in memory and high in efficiency. In practical applications, attention should be paid to backpressure control, error handling and chain calls of multi-converting streams to ensure stable and efficient stream processing.
2025-07-20 comment 0 367
Course Introduction：In IoT systems, the key links in data aggregation and processing include data aggregation, edge computing and data cleaning. ① Data aggregation reduces redundant data through timed batch uploads, event triggering or statistical summary; ② Edge computing is initially processed near the device side to reduce delays and improve fault tolerance; ③ Data cleaning removes outliers, completes missing fields and unifies the format, laying the foundation for subsequent analysis. In addition, it is recommended to use message queues to buffer data, adopt a hierarchical processing structure, strengthen monitoring and pre-security mechanisms during deployment to build an efficient and stable data pipeline.
2025-07-16 comment 0 857
Course Introduction：Geospatial data processing is a technology that ordinary people can master. Its core lies in understanding five steps: first, clarify the data source and format, such as Shapefile, GeoJSON, KML, GPX and PostGIS; second, carry out data cleaning and pre-processing, including deduplication, unified projection, complementary attributes and checking coordinate validity; third, analyze and visualize based on business needs, such as heat map, buffer analysis, distance calculation and cluster analysis; fourth, select appropriate output formats for display or sharing, such as GeoJSON, PDF, PNG, Shapefile or CSV; fifth, attach data descriptions to ensure that others can correctly understand and use them. As long as you master these key points and practice them manually, you can be effective
2025-07-21 comment 0 420
Course Introduction：Access Raw Vector Data for Processing in C This inquiry pertains to utilizing a std::vector as a char array for a function that accepts a void...
2024-11-12 comment 0 983
Course Elementary 13889
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 82443
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 13237
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 24695
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 27540
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.
2017-05-15 16:57:15 0 1 984
2017-05-17 10:08:26 0 1 806
Can PHP do data processing related to principal component analysis?
2019-02-14 16:25:42 0 2 1208
When requesting static resources from nginx, will nginx still submit it to php-fpm for processing?
2017-05-16 17:25:01 0 2 605
2018-09-10 10:02:37 0 0 1392
