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Article Introduction：Tokens are the basic unit of AI models for processing text, which can be words, characters or punctuation; 1 word in English has about 1-2 tokens, and 1 word in Chinese has about 1-3 tokens, and 1 word in Chinese has about 1-3 tokens. Due to different word segmentation methods, the number of tokens in Chinese and English varies.

2025-08-22 comment 0  1038

Article Introduction：NLTK is suitable for beginners of NLP. It is simple to install and provides a complete corpus and clear interface. It can complete basic tasks such as word segmentation, part-of-speech annotation, naming entity recognition, etc. The usage process includes installing pipinstallnltk, downloading corpus such as punkt and wordnet, importing modules and calling functions to process text, such as word_tokenize to implement word segmentation, pos_tag for part-of-speech annotation; it also supports stop word filtering, word form restoration and other functions, but attention should be paid to problems such as text preprocessing and weak Chinese support. It is recommended to use spaCy or transformers for large-scale processing.

2025-07-24 comment 0  311

Article Introduction：Receiving news from Chita.ru using Python It is mainly inspired by Python script for news parsing, statistical analysis of text segmentation and word cloud generation as implemented in projects on the CSDN platform. I also wrote

2024-11-27 comment 0  893

Article Introduction：This article details how to implement the stop word removal and word frequency statistics functions of text files in Java. The tutorial covers file reading, construction of stop word lists, text cleaning (including case conversion and punctuation processing), efficient word segmentation removal, and the complete process of using HashMap for word frequency statistics and sorting to output Top N high-frequency words.

2025-09-06 comment 0  756

Article Introduction：Word Boundary Semantics in PHP Regular ExpressionsIn PHP, word boundaries are implemented using the \b metacharacter, which matches transitions between word characters (\w) and non-word characters (\W). However, its behavior can be nuanced, as exempl

2024-10-21 comment 0  407

Article Introduction：MySQL supports full-text search, but it needs to be paid attention to its mechanism and limitations. Full-text index is based on "word", supports natural language and Boolean pattern query, and is only applicable to CHAR, VARCHAR and TEXT type columns. 1. Creation methods include adding or adding existing tables when creating tables; 2. Use MATCH() AGAINST() in query, and you can choose natural language or Boolean mode; 3. Notes include the default minimum word length is 4. Chinese word segmentation needs to be processed manually; 4. Limitations include word segmentation problems, performance bottlenecks, update delays and weak fuzzy matching. It is recommended to combine tools such as Elasticsearch to make up for the shortcomings.

2025-07-08 comment 0  754

Article Introduction：This article presents a modified approach to truncating strings in PHP, specifically considering word boundaries. By prioritizing the preservation of whole words, it ensures that truncated excerpts remain complete and semantically intact, even when t

2024-10-24 comment 0  1183

Article Introduction：To enable and use MySQL full-text index, 1. Make sure that the table engine is InnoDB or MyISAM, add FULLTEXT index when creating or modifying tables; 2. Use MATCH...AGAINST syntax to perform searches, default natural language mode, and use Boolean mode to improve flexibility; 3. Pay attention to keyword length, common word limitations and matching issues, and adjust ft_min_word_len, use Boolean mode or combine sorting optimization results; 4. In terms of performance, avoid frequent updates of fields to build indexes, control the number of index fields and maintain them regularly; 5. Chinese support is weak, and can be solved through ngram plug-in, application-layer word segmentation or external search engines.

2025-08-01 comment 0  586

Article Introduction：This article explores how to read a series of integers from a file and store them into slices in an efficient and Go convention-compliant way in Go language. By using bufio.Scanner for text word segmentation and io.Reader interface to improve code universality, combined with strconv.Atoi for type conversion, it provides a solution with clear structure and complete error handling, avoiding the length and limitations that traditional fmt.Fscanf may bring, making file reading operations more flexible and easy to maintain.

2025-08-30 comment 0  532

Article Introduction：This article introduces a method of segmenting strings in PHP, which can recognize and preserve the complete content in double quotes and prevent strings from being mis-segmented inside double quotes. With a custom parser, strings containing complex parameters can be processed efficiently and the expected segmentation results can be obtained. This article will provide detailed code examples and explanations to help readers understand and apply the method.

2025-08-23 comment 0  630

Article Introduction：Reading CSV files is commonly implemented in Python using pandas library or csv module. 1. Use pandas to read through pd.read_csv(), return DataFrame, supports specifying parameters such as sep, header, index_col, encoding, na_values, etc., suitable for data analysis; 2. Use the csv module to read line by line through csv.reader or csv.DictReader, the former returns a list, and the latter returns a dictionary, suitable for lightweight or no dependencies of third-party libraries; 3. Frequently asked questions: Use a complete path to avoid path errors, set encoding='gbk' or 'utf-8' to solve Chinese

2025-07-24 comment 0  721

Article Introduction：In PHP, determine whether a string contains a specific word, the strpos() function is preferred to check whether the keyword exists. This method is efficient but case-sensitive; if it is necessary to be case-insensitive, the strpos() function can be used; to ensure that the complete word is precisely matched, a regular expression should be used to process special characters with \b word boundaries and preg_quote(); for multi-word judgment or complex scenarios, strpos() can be called continuously, logical conditions, or traverse keyword arrays can be traversed to match.

2025-07-12 comment 0  935

Article Introduction：The MySQL indexing mechanism is the core of database optimization, and reasonable use can significantly improve performance. Common types include: 1. The primary key index is unique and non-empty, and it is recommended to use self-increment integer type; 2. The unique index ensures that the column value is unique, suitable for deduplication fields such as usernames; 3. Ordinary index is used to accelerate WHERE conditional query, suitable for fields with low repetition rate; 4. The joint index is based on multiple fields, follows the principle of leftmost matching, and the fields with high distinction degree are placed in front; 5. The full-text index is suitable for large text fuzzy searches, and attention should be paid to Chinese word segmentation and delay issues.

2025-07-06 comment 0  483

Article Introduction：wordwrap() is a string processing function used in PHP to automatically break lines. Its function is to wrap long texts in line with the specified number of characters. It allows setting the maximum number of characters per line, line breaks and whether to force break in the middle of a word. For example, using wordwrap($text,40,"\n") can wrap text with up to 40 characters per line, separated by default in spaces; if you need to force the long word to be disconnected, $cut=true should be set; labels should be used when wrapping lines in web pages; Chinese text is recommended to be processed in combination with other functions. Common application scenarios include formatting email text, controlling the log output width, and displaying long text input by users.

2025-07-09 comment 0  389

Article Introduction：This article aims to provide a tutorial on using JavaScript to create search input boxes with clearing. We will explain in detail how to listen for input events in the input box and clear button click events, and dynamically display or hide an icon based on the content of the input box. This solution does not require PHP, is fully implemented on the front-end, and provides complete HTML and JavaScript code examples, which are convenient for readers to get started quickly.

2025-08-31 comment 0  405

Article Introduction：The key to creating an index in Word is to mark keywords and automatically generate a list. The specific steps are as follows: 1. Select the keyword and click "Tag entry" to set the main keyword and subkeywords; 2. Select the built-in format or custom fonts, columns and other styles in "References"; 3. Insert the index to the end of the document, and press F9 to update the domain through the selected document to synchronize the content; 4. If the index does not respond, check whether the tag or update is missing. There are too many keywords to classify the sub-entries, and the sorting language can be set to Chinese. Master these steps to efficiently complete index settings.

2025-07-12 comment 0  763

Article Introduction：According to relevant laws and regulations, WeChat Pay has now implemented a real-name authentication system for all users. For users who do not have a Chinese mainland resident ID card, they must submit the corresponding identity information to complete the authentication. This provision follows the "Know Your Customer" (KYC) guidelines commonly used in the global banking industry and is designed to prevent fraud and illegal activities. If you have not completed the real-name authentication of WeChat payment, you will receive a prompt notification when trying to make payment. To continue using the payment function, please click the notification and submit the following information: ID certificate (currently supports passports, Hong Kong and Macao residents' mainland passes, and Taiwan residents' mainland passes) and complete names (including uppercase and uppercase cases and punctuation marks) mobile phone number address information occupation information clear photos of the above documents used for the above documents.

2025-07-27 comment 0  246

Article Introduction：Inverting strings can be implemented in PHP through a variety of methods: 1. Use the strrev() function to quickly invert English strings, but are not suitable for multi-byte characters; 2. For strings containing Unicode characters such as Chinese, you can customize the mb_strrev() function, and use mb_strlen() and mb_substr() to operate according to characters to avoid garbled code; 3. You can also use array operations to split the string into an array, invert and then splice it. The logic is clear and suitable for teaching, but the performance may not be optimal. The appropriate method should be chosen for different scenarios.

2025-07-10 comment 0  984

Article Introduction：The method of getting the day of the week in PHP is as follows: 1. Use the date() function to match the 'w' or 'l' parameters to get the current week in the form of a number or English name respectively; 2. Convert it to Chinese week through a custom mapping array; 3. Use strtotime() to get the week of the specified date; 4. Pay attention to setting the time zone to ensure the accuracy of the results. For example, date('w') returns 0~6 to mean Sunday to Saturday, date('l') returns the complete English week name, and can output Chinese weekdays with a mapping array. When processing non-current dates, you need to use strtotime() to convert it to a timestamp and then pass it in date(). If the result is abnormal, check and set the correct time zone such as Asia/Shanghai.

2025-07-08 comment 0  743

Article Introduction：Using mb_substr() is the correct way to solve the problem of Unicode string interception in PHP, because substr() cuts by bytes and causes multi-byte characters (such as emoji or Chinese) to be truncated into garbled code; while mb_substr() cuts by character, which can correctly process UTF-8 encoded strings, ensure complete characters are output and avoid data corruption. 1. Always use mb_substr() for strings containing non-ASCII characters; 2. explicitly specify the 'UTF-8' encoding parameters or set mb_internal_encoding('UTF-8'); 3. Use mb_strlen() instead of strlen() to get the correct characters

2025-07-27 comment 0  926