string 在 Lua 中将字符串中的所有字符变成小写
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Making all the characters in a string lowercase in Lua
提问by OddCore
Here is the thing. I am trying to convert a string in lowercase in Lua, but it's not working. I have done this
这是事情。我正在尝试在 Lua 中将字符串转换为小写，但它不起作用。我已经这样做了
String = String:lower()
but it doesn't like it. I am sure that is the way to do it, I've seen it done before. A few sites suggest it might be a problem caused by a wrong version of the interpreter.
但它不喜欢它。我相信这是这样做的方法，我以前见过它。一些站点表明这可能是由错误版本的解释器引起的问题。
Any ideas?
有任何想法吗？
回答by Hendrik
You're right, this is one of the ways to do it. It would only not work and throw errors if your "String" variable is not a string.
你是对的，这是做到这一点的方法之一。如果您的“字符串”变量不是字符串，它只会不起作用并抛出错误。
Personally, i usually prefer to use something like..
就个人而言，我通常更喜欢使用类似..
myString = string.lower(myString)
But its really the same as doing
但它真的和做一样
myString = myString:lower()
assuming that myString is actually a string, however.
然而，假设 myString 实际上是一个字符串。
The "long" version has one advantage, it actually works if myString is a number, while the second one errors in that case.
“长”版本有一个优点，如果 myString 是数字，它实际上可以工作，而在这种情况下第二个错误。
