Lua string split 5w次，点赞4次，收藏29次。本文介绍了三种使用Lua语言进行字符串分割的方法。第一种利用string库的gsub函数和正则表达式实现；第二种通过字符串查找和子串截取完成分割任务；第三种适用于日志等特定格式文本的分割。 Dec 18, 2020 · 摘要：根据lua的基础string库实现split和strip 背景：通过ngx. gsub(str,token,'') f='' for i=1,token_num do f=f. strsplittable [] chunks string [] - Returns an array of strings. ”将它分割之后将元素存入一个表中，如果是在C语言中，很方便地就能索引到每一个点以及元素，但是 split a string into an array of substrings. If you ever missed split, trim and other functions the this package provides such functions by extending Lua's default string library Lua 字符串 字符串或串(String)是由数字、字母、下划线组成的一串字符。 在 Lua 中，字符串是一种基本的数据类型，用于存储文本数据。 Mar 13, 2024 · Lua’s string. Method & Purpose; 1: string. " Understanding the zero-based (1-indexed in Lua) indexing behavior is essential for using substrings Learn how to use Lua functions to find, extract, format, and convert strings. Use % to escape here (and %% to escape a Also note that whitespace from the original string will be preserved, for example string. Be sure to use the correct escape sequences to include special characters, such as `\"` for double quotes or `\\` for a backslash. 3. Programming in Lua Part III. Since you have to do the splitting manually, you'll probably use a pattern again: May 12, 2023 · string. Jul 18, 2023 · 一个简单的例子，Redis 使用 Lua 实现 split 方法分割字符串为数组，并通过 HMGET 批量读取数据。 用例说明： 哈希队列 H_TEST 的键 ids 中，存储着所需要批量读取的元素键名的字符串， 首先需要将读取到的字符串按 “，” 逗号分割成数组，再通过 hmget 方法来获取所有元素并返回。 道言空 字符串分割函数： function split(str,delimiter) local dLen = string. This first edition was written for Lua 5. "]" end local locaStart,locaEnd = string. gmatch ，它可以在许多情况下用作分割函数。 与分割函数不同，string. split; java split string on two or more spaces except for words in quotes; split strings by space in r; how to split a string by spaces rust; java split string on two or more spaces except for words in quotes; split funtion in string on multiple spaces; split string by spaces python; c++ split string by several space; lua string split This function does not try to (correctly) invert the pattern, and so really doesn't work as most string split functions do. To use the split function, you need to provide a string and a delimiter. Ask Question Asked 8 years, 11 months ago. (含有空串) function lua_string_split(str, split_char) local sub_str_tab = {}; while (true) do local pos Jun 2, 2020 · lua string方法拓展 字符或字符串分割输入字符串，返回包含分割结果的数组 local input = " Hello,World " local res = string. I am currently simply reading the string backwards from the end looking for . split=function(str,token) ret={} _,token_num=string. Jan 21, 2014 · Unfortunately, in LUA, there is no inbuilt string splitting function, which is very inconvenient. 1 Reference Manual中的string. gsub (Global Substitution), and string. split(szFullString, szSeparator) local nFindStartIndex = 1 local nSplitIndex = 1 local nSplitArray = {} while true do local nFindLastIndex = string. Nov 27, 2017 · I have a string in lua. When you then pass these two indices to sub, you get a substring that both starts and ends at 11, so you only get ';'. Parameter is not needed if using second form of the syntax above. lua. split 是 Lua 中的一个函数，用于将字符串按照指定的分隔符分割成多个子串，并返回一个包含所有子串的表。该函数可以用于处理中文字符串，但需要注意一些特殊情况。比如，如果字符串中包含 split_string_by_line. LUA只包括一个精简的核心和最基本的库. The www. For more complex string operations, you might want to look into additional libraries or write custom functions. Example [] Apr 13, 2013 · For a more direct translation of your JavaScript, first note that there is no split function in Lua. gmatch 使用模式来匹配非分隔符文本，而不是分隔符本身。 Jun 14, 2019 · 其实比起实现,我更好奇的是为什么 Lua 不将 split 函数加入到标准库中,毕竟标准库中已经有了 table. gmatch. sub include pattern matching with string. Parameters. upper(argument) Returns a capitalized representation of the argument. See Section 7. -)'. Returns [] strsplit [] s1, s2, string - Returns a variable amount of string variables. strfind (str, substr, [init, [end]]) Receives two string arguments, and returns a number. "in" a dir that will walk into it, i. Feb 23, 2015 · Lua split string using specific pattern. Apr 27, 2015 · lua并不象其它许多"大而全"的语言那样，包括很多功能，比如网络通讯、图形界面等。但是lua可以很容易地被扩展：由宿主语言(通常是c或c++)提供这些功能，lua可以使用它们，就像是本来就内置的功能一样。 May 26, 2014 · Lua split string using specific pattern. How can this be done in Lua, when neither the length of the initial string is fixed, nor the chunk size? Example. split; Jan 14, 2015 · The answer to "How do I split a long string composed of 3 digit numbers": This is trivial. 3. gfind (Global Find). To illustrate, let’s look at a simple example of how to use `string. get_headers()["Cookie"]拿到的cookie发现是字符串需要分割的时候没找到相关函数，遂回过头来再看看字符串处理 目标：实现lua的字符串分割，以及去除字符串开头结尾的指 This function does not try to (correctly) invert the pattern, and so really doesn't work as most string split functions do. I need to split out the filename, extension and path from the string. Tried code : 一个简单的例子，Redis 使用 Lua 实现 split 方法分割字符串为数组，并通过 HMGET 批量读取数据。 用例说明： 哈希队列 H_TEST 的键 ids 中，存储着所需要批量读取的元素键名的字符串， 首先需要将读取到的字符串按 “，” 逗号分割成数组，再通过 hmget 方法来获取所有元素并返回。. gsub(str,'[^'. By default, the separator character is , but you can specify an alternative character or series of characters. gmatch() 関数を使用することです。string. Matteo answered on March 1, 2020 Popularity 10/10 Helpfulness 4/10 Contents ; answer lua string split; related lua string. req. 1 day ago · Returns a table containing the split sections of the string. 1. Empty String ""--> "" Mar 30, 2024 · --判断一个字符串中有几个特定的分隔符，一般我喜欢用 '|' function getcountinstr(str,del) local count = 0 local pos = 1 while true do pos = str:find(del, pos+1) if not pos then break end count … Jan 2, 2020 · lua的官方函数里无字符串分割,起初写了个简单的，随之发现如果是中文、字符串、特殊符号就会出现分割错误的情况，所以就 Aug 29, 2016 · 说干就干，必须要以码会友。 #!/usr/bin/lua common = {} -- 切割函数(split功能) -- szFullString 待切割数据 -- szSeparator 切割判断 function common. Nov 13, 2022 · 文章浏览阅读1. main. find(szFullString, szSeparator, nFindStartIn_lua string. token end Dec 28, 2016 · Lua에는 기본적으로 split 함수가 없는지. split("abc _ def", "_") will honor the whitespace on both sides of the _ separator. sub() function. sub() function is used to extract a piece of the string. Jan 19, 2015 · string. attempt to call global 'split' (a nil value) 해결법은 아래 함수를 추가후 string. So it doesn't looks like this: (line1): Long long long string (line2): string but more like this: (line1): Long string string string string (line2): string and this is the res of the string string. The fourth edition targets Lua 5. May 14, 2012 · lua并不象其它许多"大而全"的语言那样，包括很多功能，比如网络通讯、图形界面等。但是lua可以很容易地被扩展：由宿主语言(通常是c或c++)提供这些功能，lua可以使用它们，就像是本来就内置的功能一样。 Aug 31, 2021 · lua SplitStr split into array lua how to split string in lua split words lua how to string split lua lua string split with = lua split string line by line lua separate string by char how to split require function in lua split based on filed lua lua split string into separate letters lua sting split string split in Lua lua 5. 首先，虽然 Lua 的标准库中没有分割函数，但它确实有 string. May 20, 2024 · If you are splitting a string in Lua, you should try the string. 1）根据 repl 来做替换，并将最终的字符串返回。 Apr 9, 2024 · In this article, we have explored various ways to split a string in Lua while preserving spaces. delimiter):gmatch("(. Passed as a string, and allows for Lua pattern types. lua This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. 3 and is available at Amazon and other bookstores. Additionally, many developers might struggle with escaping characters within strings. gmatch(example, "%S+") do -- print the substring print(i) end Output. Passed as a string. gmatch() or string. gmatch()或string. split Dec 6, 2013 · The builtin string library treats Lua strings as byte arrays. Corner Cases. 2. Sep 6, 2021 · Lua中指定分隔符，按索引来访问分割后取数据 string库的gsub函数，共三个参数：1. reps. 2 for some examples on string manipulation in Lua. 7k次。网上找的方法大多比较复杂，什么闭包，什么 gsub，我只要一个简单是字符串分割而已，索性自己写算了，面向搜索引擎编程罪恶感慢慢，我想当个真的程序员~~--[[ str：要分割的字符串 dilimiter：分割符 --]]function split(str, dilimiter) -- 声明准备要分割的子字符串的前后索引, 以及 Mar 22, 2013 · LUA: String split after number of characters. e. Feb 19, 2025 · 使用lua实现split字符串分隔 LUA并不象其它许多"大而全"的语言那样,包括很多功能,比如网络通讯. By using the functions in the string library, you can easily split a string into multiple substrings based on a pattern. gsub (s, pattern, repl [, n]) 拷贝整个字符串 s （或者前 n 个，如果传了此参数的话），将其中每个遇到的 pattern 匹配和捕获（参见6. String: "0123456789" (Length = 10) should be splitted in strings of 3 characters May 21, 2020 · Source: Split string by line in Lua · GitHub Further searching has just pushed me into constant dead ends; from as complex as understanding (non-)greedy captures, why \r\n is the specific expression for a new line and why not either of those individually: and what the difference between a newline and a carriage return is. str是待分割的字符串2. 1 split lua split The most powerful functions in the string library are string. 文章浏览阅读1. In this case, both indices are 11. 실행 시 아래와 같은 오류 메시지가 발생한다. Sr. 3k次。function Split(szFullString, szSeparator)local nFindStartIndex = 1local nSplitIndex = 1local nSplitArray = {}while true do local nFindLastIndex = string. insert(words, w) append found match (word) to words array Lua库文件编写指南(纯lua编写) C接口实现Task等待功能 string. 2 String Manipulation. 2: string. sub() function takes three arguments in general, the first argument being the name of the string from which we want to extract a piece, the second argument is the i-th index or say, the starting index of the string piece that we 文章浏览阅读2. Apr 7, 2022 · 文章浏览阅读1. find(szFullString, szSeparator, nFindStartIndex) if not nFindLastIndex then In Lua, strings are 1-indexed, meaning the first character of a string is at position 1. gsub and string. 简单搜索了一下相关的 Lua mailing list ,发现了一个相关 回答 ,引用如下: 对于此函数，pattern 开头中的锚点 '^' 将不会生效，因为其会阻止迭代。 string. this array will container list of words. split(input May 17, 2022 · 原文链接 1. sub()方法。如果知道要拆分字符串的索引，请使用string. 图形界面等. find ( self, delimiter, from ) -- 找到定界符位置的范围 while delim_from do-- 如果找到了定界符 table. delimiter) do table. Things get more demanding when a C function needs to create a string to return to Lua. 2. 6. However, you could use string. "[". How can i do this? Feb 11, 2017 · Luaは記述しやすく、動作も早くて気に入ってきました。そこで、便利スニペットを色々用意することにしました。(逐次追加していく予定です)文字列を特定の文字で分割し配列を返すfunction sp… Dec 28, 2023 · 网上找的方法大多比较复杂，什么闭包，什么 gsub，我只要一个简单是字符串分割而已，索性自己写算了，面向搜索引擎编程罪恶感慢慢，我想当个真的程序员~~ --[[ str：要分割的字符串 dilimiter：分割符 --]] function split(str, dilimiter) -- 声明准备要分割的子字符串的前后索引, 以及保存分割后的子字符串 Sep 19, 2012 · Lua的string库似乎没有字符串分割函数，所以我在网上搜了一个 -- 参数:待分割的字符串,分割字符 -- 返回:子串表. 2 – String Manipulation. 13”根据右下角的”. I want to split a string which would be username:reason by the colon and then put this into two arguments to use them later, how would I do this? Side-note: the reason part won’t just be a word, it’ll be a sentence or so. When a C function receives a string argument from Lua, there are only two rules that it must observe: Not to pop the string from the stack while accessing it and never to modify the string. match, which is more powerful but can be overkill for simple tasks. The string. lua is great The above example works fine for simple patterns but when we want to make use of a sample string to split. function string:split1(sep) local sep = sep or "," local result = {} local i = 1 for c in (self. gmatch()。 使用Lua 5. Lua how to split a word pair string into two separate variables? Jun 15, 2021 · Programming in Lua : 20. 3k次。lua中字符串拆分处理split函数实现lua中没有split直接拆分字符串的方法，只有sub，这个就很烦a = '1/233'function Split(szFullString, szSeparator)local nFindStartIndex = 1local nSplitIndex = 1local nSplitArray = {}while true do local nFindLastIndex = string. gmatch to begin a regular expression matching and the following is a short and neat alternative. Idiom #49 Split a space-separated string. You won’t find a vast standard Jun 1, 2019 · "require 'string. sub() methods. References. Sep 14, 2016 · Let's say I have a string with 2000 chars. The function will then split the string into substrings whenever the delimiter is encountered. looking for a Lua-based solution for splitting a string into two or more components. gmatch() を使用した分割string. sub`: local str = "Hello, Lua!" local substr = string. format("([^%s]+)", sep) self:gsub May 26, 2022 · I'm looking for the most efficient way to split a Lua string into a table. sub(str Jan 26, 2016 · 文章浏览阅读7. Match word which is not enclosed in quotes in Lua. 4 Reference Manual - String Mar 1, 2020 · function Split(s, delimiter) result = {}; for match in (s. split. finds all matches by a given regex. I have strings Mar 22, 2016 · function string:split (delimiter) local result = { } -- 新建一个结果表 local from = 1-- 字符串的起始位置 local delim_from, delim_to = string. I want to split this string in equal sized chunks of 500 chars, so I would end up with 4 strings of 500 chars. function trim(s) local l = 1 while strsub(s,l,l) == ' ' do l = l+1 end local r = strlen(s) while strsub(s,r,r) == ' ' do r = r-1 end return strsub(s,l,r) end. Lua 字符串库包含很多强大的字符操作函数。字符串库中的所有函数都导出在模块 string 中。在 Lua 5. As with the “split” functionality, string trimming is not native to Lua’s string library, but it can be accomplished easily enough. Aug 23, 2017 · string_split_with_comma_2. delimiter: The delimiter to use when splitting the string. words. Unlike several other scripting languages, Lua does not use POSIX regular expressions (regexp) for pattern matching. sub ( self, from , delim_from-1) ) -- 插入 Sep 14, 2009 · 如果要在Lua中拆分字符串，应该尝试使用string. function string:split(delimiter) local result = { } local from = 1 local delim_from, delim_to = string. If the delimiter is not present in the string, then the result will be a table consisting of one item: the original string parameter. sub(str, start[, end]) ``` - `str`：要截取的字符串。 - `start`：起始位置（可以为负数，表示从字符串末尾开始计数）。 Oct 13, 2021 · 文章浏览阅读1. string: The string to split. I found two possible ways using gmatch or gsub and tried to make them as fast as possible. sub`函数的基本语法如下： ```lua string. string. How do I do this? String 库. --[[ written for Lua 5. sep):gmatch("(. iterate through all matches items "[^ ]+" match all symbols except space (thus, we're going to split by space here) table. sub`函数。`string. Its main selling point is that it can be used as a drop-in replacement for the string library, making most string operations “magically” Unicode-capable. Sep 30, 2017 · 用法: local list = Split("abc,123,345", ",") 然后list里面就是 abc123345 第二个参数可以是多个字符，但是不能是Lua正则表达式。 27. ins Lua 字符串 作者：杨梦鸽 校对：翟舒青 字符串或串(String)是由数字、字母、下划线组成的一串字符。 Lua 语言中字符串可以使用以下三种方式来表示： 单引号间的一串字符。 Jun 19, 2024 · Luaでは、文字列の一部を抽出するためにstring. Example using string. 启动速度快,从而适合 Aug 8, 2012 · string. It's a bunch of [a-zA-Z0-9]+ separated by a number (1 or more) spaces. Jan 4, 2017 · How to split string in Lua by semicolon? local destination_number="2233334;555555;12321315;2343242" Here we can see that multiple times occurrence of semicolon (;) but I need output from above string only before first occurrence. find (string Find), string. Splitting strings in Lua. How do I split a string with multiple separators in lua? 1. There is no library method available to convert an array to string but we can use concatenate operator to concatenate entries of an array to get a string from an array. 2+ you can also just use a frontier pattern to check for either a newline or the end of the string: [^\n]*%f[\n\0], but that won't Mar 1, 2020 · lua string split. 利用string库的gsub函数 function split( str,reps ) local resultStrList = {} string. ']+'是正则表达式，查找非reps字符，并且多次匹配3. 8w次。-- 分隔字符串function string:split(sep) local sep, fields = sep or "\t", {} local pattern = string. sub(str,1,locaStart-1) n = n + 1 end str = string. See examples of strfind, strlen, strsub, strlower, strupper, ascii, and format. May 20, 2015 · 好的，用户想要在Lua中实现字符串分割的方法。我需要先回忆一下Lua的标准库中有没有直接的split函数。嗯，Lua的标准库确实没有提供现成的字符串分割函数，这点我记得没错。 - Maximum number of pieces to make (the "last" piece would contain the rest of the string); by default, an unbounded number of pieces is returned. for w in. string. split(str, delimiter, keepEmtry)# Split a string by a character in Lua. sub(str, 1, 5) -- "Hello" In this case, the function extracts characters from index 1 to index 5, returning "Hello. insert ( result, string. concat though, which works like join . 1w次，点赞3次，收藏4次。Lua自己实现string. An alternative that works on multibyte (Unicode) characters is the unicode library that originated in the Selene project. There is table. Modified 3 years, 8 months ago. sub(delimiter,i,i). I am sure I should be able to do this using a Lua pattern, but I keep failing when it comes to working from the right of the string. Trimming strings can be useful in several cases, especially if you’re working with data from an external source, or data that is input by the user via the device’s keyboard. May 19, 2022 · If your string always includes a newline character at the end of the last line like in your example, you can just do something like "([^\n]*)\n" to prevent random empty strings and the last empty string. You might take a look at the gmatch function in the reference manual : Another important function of the Lua's string library is the string. find(szFullString, szSeparato_lua split函数 Feb 22, 2024 · 最近在工作中遇到需要对字符串按某个字符分割处理，然后遇到了一下小问题，在这里介绍一下自己的处理方法和理解。。 具体问题就是：我希望将这样一个lua字符串”1. org These functions will return a iterator that yields filename, type pair. Contribute to mah0x211/lua-string-split development by creating an account on GitHub. sub関数を使用します。この関数は、指定した開始位置から終了位置までの部分文字列を返します。以下に具体的な例とともに詳細を説明します。 基本的な抽出 Array is an ordered arrangement of objects whereas string is a continous sequence of characters. 4. split()方法详解 Lua的string函数也是我在日常工作中使用最多的，但是都是比较简单的~上周末看的视频讲的也比较浅显。整理一下笔记，不然我下次又忘记咋用了。 Apr 15, 2014 · I have come across functions that split a string in lua ut my requirement is to split a string when it starts with a lowercase letter, If it does,in my case the string is bound to have a part of string starting with capital letter like : mdmMSH. insert(words, w) append found match (word) to words array split(string, delimiter) => { results } The delimiter can be a literal string or a Lua pattern. find( self, delimiter, from ) while delim_from do Here, we provide an implementation of the split function in Lua along with usage examples to help you understand its usage and functionality. We have covered the key concepts and provided detailed context on the topic. split功能 split函数是编程语言中使用的函数，是指返回一个下标从零开始的一维数组，它包含指定数目的子字符串_lua string. What I mean is if i had a string named "str" and it was equal to "hello world", str = "hello world" it should somehow return the string "world" because it is after the space. Lua 5. They all are based on patterns. '(. default pattern splits by white space. to cut off the extension, and the first \ to get the path. Use the string. sep) do result[i] = c i = i + 1 end return result end function string:split2(sep) local sep = sep or "," local 在Lua中，截取字符串中的子字符串可以使用`string. 0. I’ve tried searching for an answer to my question but haven’t found one yet. insert(result, match); end return result; end split_string 6. the next iteration will yields the content in this folder. len(delimiter) local newDeli = '' for i=1,dLen,1 do newDeli = newDeli . Viewed 11k times 3 . '[^'. How do I take the string and split it into a table of strings? Aug 13, 2020 · I'm trying to split a string on a space in Lua. Split multiple string in Lua. . This library provides generic functions for string manipulation, such as finding and extracting substrings. Alternatives to string. gmatch() from Lua 5. sub()方法；如果要分析字符串以查找要拆分字符串的位置，请使用string. While still largely relevant for later versions, there are some differences. In Lua 5. concat 函数(可以认为是 split 的反函数). sub and pattern matching are based on C functions due to Lua’s C roots. sub is part of its richer string library, making string manipulation a breeze. Jul 6, 2022 · lua string. To review, open the file in an editor that reveals hidden Unicode characters. A string splitting function will split a source string according to a delimiter (char separator), into a array of substrings. gmatch() if you will parse the string to find the location to split the string at. Inspect the following function: May 18, 2011 · find actually returns two values, which are the start and end indices of where the string you looked for is. lua-- define a local variable local example = "lua is great" -- split string based on space for i in string. 这使得LUA体积小. The function returns a table of items found by splitting the string up into pieces divided by the delimiter. No. gmatch() 関数は、パターンに一致する部分を文字列から繰り返し抽出します。 分割字符串. When indexing a string, the first character has position 1. When we run the above code, we will get the following output−. sample string to split. lower(argument) Returns a lower case representation of the argument. By buying the book, you also help to support the Lua project . 1 split a string by a pattern, take care to create the "inverse" pattern yourself. Apr 4, 2013 · Good one, but what it does is it splits string by last space but what I'm trying to make is that it splits by last space that is near at least 20/30 chars. gmatch()的示例 Jun 7, 2020 · Hey all! I hope you’re keeping safe during this epidemic. 但是LUA可以很容易地被扩展:由宿主语言(通常是C或C++)提供这些功能,LUA可以使用它们,就像是本来就内置的功能一样. Add Answer . 每次分割完的字符串都能通过回调函数获取到，w参数就是分割后的一 Dec 18, 2018 · Lua是一种轻量级的编程语言，因其简单易用和高效性能而广泛应用于游戏开发、嵌入式系统、数据分析等多个领域。字符串处理是编程中常见的任务之一，而Lua为开发者提供了丰富而灵活的字符串处理功能。 split(string, delimiter) => { results } The delimiter can be a literal string or a Lua pattern. ']+',function ( w ) table. The type could be: "file" a file name "dir" a dir the will not walk into it. The second example shows a function that eliminates all blanks of a string. Build list chunks consisting in substrings of the string s, separated by one or more space characters. 1 中，它还将这些函数导出作为 string 类型的方法。 The first example is a function to trim extra blanks at the beginning and end of a string. See examples of simple and complex patterns and how to return the split parts as a table. -)". split'" 语句表明这个函数可能是从一个名为string的模块中加载的，该模块提供了split函数的实现。在Lua中，模块通常是用require函数来加载的，require会执行指定的脚本文件，并返回一个或多个函数 Lua’s string manipulation capabilities are quite powerful, and many operations can be performed using pattern matching with string. The package extends default Lua's string library with several useful common methods which are present in most other languages. sub() method if you know the index you wish to split the string at, or use the string. 1 Reference Manual: Jul 20, 2021 · Learn how to use the gmatch () function and a custom function to split a string into different parts based on a pattern or a regular expression. find(str,newDeli) local arr = {} local n = 1 while locaStart ~= nil do if locaStart>0 then arr[n] = string. split函数已经针对Lua的字符串处理进行了优化，并且在大多数情况下，它的执行速度已经足够快。 然而，如果你需要对一个非常大的字符串进行复杂的分割操作，或者需要使用正则表达式来匹配模式，那么使用gmatch可能会更合适。 Feb 18, 2025 · Lua において、文字列を分割するにはいくつかの方法があります。最も一般的な方法は、string. in this case i would like to split while it starts at M and add MSH to a table. split 함수를 사용하면 된다. syj ehze fpxvt llt jsew lfamuzd ulsw nod tjculk mxpq eor fpv nme hcjz veiznv