string 从字符串 Scala 的末尾删除字符
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Remove Characters from the end of a String Scala
提问by BefittingTheorem
What is the simplest method to remove the last character from the end of a String in Scala?
在 Scala 中从字符串末尾删除最后一个字符的最简单方法是什么？
I find Rubys String class has some very useful methods like chop. I would have used "oddoneoutz".headOption in Scala, but it is depreciated. I don't want to get into the overly complex:
我发现 Rubys String 类有一些非常有用的方法，比如chop。我会在 Scala 中使用 "oddoneoutz".headOption，但它已贬值。我不想陷入过于复杂的：
string.slice(0, string.length - 1)
Please someone tell me there is a nice simple method like chop for something this common.
请有人告诉我，对于这种常见的东西，有一个很好的简单方法，比如剁碎。
回答by Don Mackenzie
How about using dropRight, which works in 2.8:-
使用在 2.8 中有效的 dropRight 怎么样：-
"abc!".dropRight(1)
Which produces "abc"
产生“abc”
回答by Walter Chang
string.init // padding for the minimum 15 characters
回答by David Winslow
val str = "Hello world!"
str take (str.length - 1) mkString
回答by Stefan Kendall
string.reverse.substring(1).reverse
That's basically chop, right? If you're longing for a chop method, why not write your own StringUtilslibrary and include it in your projects until you find a suitable, more generic replacement?
这基本上是砍，对吧？如果您渴望使用chop 方法，为什么不编写自己的StringUtils库并将其包含在您的项目中，直到找到合适的、更通用的替代方法？
Hey, look, it's in commons.
嘿，看，它是公共的。
回答by Andriy Plokhotnyuk
If you want the most efficient solution than just use:
如果您想要最有效的解决方案，而不仅仅是使用：
str.substring(0, str.length - 1)
