java - 如何在 Scala 中以字符串格式重复参数

Question

如何重复使用相同的字符串进行格式放置？例如

"%s-%s-%s" format("OK")
>> "OK-OK-OK"

Answer 1

这应该有效:

"%1$s-%1$s-%1$s" format "OK"

WrappedString的格式方法在后台使用 java.util.Formatter。还有 Formatter Javadoc说:

The format specifiers for general, character, and numeric types have the following syntax:

%[argument_index$][flags][width][.precision]conversion

The optional argument_index is a decimal integer indicating the position of the argument in the argument list. The first argument is referenced by "1$", the second by "2$", etc.