string Scala - 从字符串中获取最后两个字符
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Scala - Get last two characters from string
提问by jhdevuk
How would I return the last two characters of a string?
我将如何返回字符串的最后两个字符？
回答by oxbow_lakes
Scala allows you to do this in a much cleaner way than the standard StringAPI by leveraging the collections API (for which there is an implicit conversion from a java.lang.Stringinto an IndexedSeq[Char]):
Scala 允许您String通过利用集合 API（其中存在从 ajava.lang.String到 an的隐式转换IndexedSeq[Char]）以比标准API更简洁的方式执行此操作：
str takeRight 2
The fantastic thing about the API of course, is that it preserves the type representation of the original "collection" (i.e. Stringin this case)!
当然，API 的奇妙之处在于它保留了原始“集合”的类型表示（即String在这种情况下）！
回答by Govind Singh
you can use
您可以使用
.takeRight(2)
var keyword="helloStackoverFlow"
println(keyword.takeRight(2)) // ow
回答by Dinar Gataullin
You can take (string length -1) that reveal last index of your string, (string length -2) will be next character from end:
您可以使用 (string length -1) 显示字符串的最后一个索引，(string length -2) 将是从末尾开始的下一个字符：
str(str.length-1)+str(str.length-1)
str(str.length-1)+str(str.length-1)
