小编you*_*kel的帖子

Lua中是否有一个函数可以返回一个字符串，该字符串插入到给定位置的另一个字符串中？

例如string.insert(str1, str2, pos)。

使用它：string.insert('Hello World!', 'My ', 6)成为Hello My World!等等。

Is there any way to get several values from a function without creating variables for it?

local major, minor, revision, codename = love.getVersion() -- Get current LÖVE version as a string.

So instead of making four different variables (or array) we'll use something that will just return a value you need.

get( love.getVersion(), 0 ) -- Will return the first value (major).

I read somewhere that I can use square brackets and triedlove.getVersion()[1] but it says "Attempt to index …

我希望我的用户能够从他们的计算机中选择一种字体并更新网页以使用该字体。

<style>
html * { font-family: Arial !important; }
</style>

我使用html *并且css我想将字体系列更改为用户的文件。

<script>
function change_css() {
    // ???
}
</script>

<div>
  <div</div>
  <input type="file" name="upload" id="upload"/>
  <input type="submit" value="submit" onclick="change_css();">
</div>

如何实施？