Lua如何删除".html"字符串末尾的文字 [英] Lua how to remove ".html" text from end of string

问题描述

所以我在Lua中有一个字符串，我想删除字符串末尾的所有出现的".html"文本

So I have a string in Lua and I want to remove all occurances ".html" text of the end of the string

local lol = ".com/url/path/stuff.html"

print(lol)

我想要的输出:

.com/url/path/stuff


local lol2 = ".com/url/path/stuff.html.html"

print(lol2)

我想要的输出:

.com/url/path/stuff

推荐答案

首先，您可以定义如下函数:

First, you could define a function like this:

function removeHtmlExtensions(s)
    return s:gsub("%.html", "")
end

然后:

local lol = ".com/url/path/stuff.html"
local lol2 = ".com/url/path/stuff.html.html"

local path1 = removeHtmlExtensions(lol)
local path2 = removeHtmlExtensions(lol2)

print(path1) -- .com/url/path/stuff
print(path2) -- .com/url/path/stuff

从 gsub 方法返回的第二个值指示匹配模式的次数.例如，它返回带有 path1 的 1 和带有 path2 的 2 .(以防万一信息对您有用)

There is a second value returned from the gsub method that indicates how many times the pattern was matched. It returns, for example, 1 with path1 and 2 with path2. (Just in case that info is useful to you):

local path2, occurrences = removeHtmlExtensions(lol2)

print(occurrences) -- 2

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