String Replace in Scala

In Scala, you can replace part of a string using the replace() method:

s.replace(old, replacement)          // replaces all occurrences
s.replaceFirst(regex, replacement)   // replaces first match

Here are some examples:

var sentence = "I love cats"
var result = sentence.replace("cats", "dogs")
println(result)  // "I love dogs"

var text = "aaa"
println(text.replace("a", "b"))  // "bbb"

replace() returns a new String — the original is not modified.