Remove words of a string started by uppercase characters in Scala

Question

I want to write an algorithm that removes every word started by an uppercase character in a string.

For example:

Original string: "Today is Friday the 29Th."

Desired result: "is the 29Th."

I wrote this algorithm, but it is not complete:

def removeUpperCaseChars(str: String) = {
    for (i <- 0 to str.length - 1) {
      if (str.charAt(i).isUpper) {
        var j = i
        var cont = i
        while (str.charAt(j) != " ") {
          cont += 1
        }
        val subStr = str.substring(0, i) + str.substring(cont, str.length - 1)
        println(subStr)
      }
    }
  }

It (supposedly) removes every word with uppercase characters instead of removing only the words that start with uppercase characters. And worse than that, Scala doesn't give any result.

Can anyone help me with this problem?

Answer 1

With some assumptions, like words are always split with a space you can implement it like this:

scala> "Today is Friday the 29Th.".split("\\s+").filterNot(_.head.isUpper).mkString(" ")
res2: String = is the 29Th.

We don't really want to write algorithms in the way you did in scala. This is reather a way you would do this in C.