Lua如何从字符串末尾删除 ".html"文本

Question

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

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

Answer 1

首先，你可以定义一个这样的函数:

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

gsub 返回了第二个值指示模式匹配多少次的方法。例如，它返回 1与 path1和 2与 path2 . (以防万一该信息对您有用):

local path2, occurrences = removeHtmlExtensions(lol2)

print(occurrences) -- 2