## String Replacer

enables fast switching between certain letters in Strings

```swift
var s = StringReplacer(("E", "3"), ("g", "9"), ("O", "0"), ("o", "0"), ("l", "1"))

s["1"] = "l"

var str = "hallo"

s.replace(in: &str)
print(str) // Prints "ha110"
s.replace(in: &str)
print(str) // Prints "hall0"
```