Remove duplicate consecutive spaces from a given string, in-place.
For example: "Have a nice day" should become "Have a nice day".
Removal of leading and trailing spaces was not specifically mentioned.

Question

Remove duplicate consecutive spaces from a given string, in-place. 
For example: "Have     a      nice         day" should become "Have a nice day". 
Removal of leading and trailing spaces was not specifically mentioned.

Tomer · Accepted Answer

foo - Using a recursive function
foo2 - Using an iterative process

def foo(s):
        if len(s) = 2:
                if s[i] == s[i+1] == " ":
                        s = s[:i] + s[i+1:]
                else:
                        i += 1

        return s

Tomer · Answer

The iterative process:
def foo2(s):
        if len(s) = 2:
                if s[i] == s[i+1] == " ":
                        s = s[:i] + s[i+1:]
                else:
                        i += 1

        return s

Tomer · Answer

Recursive solution:
def foo(s):
        if len(s) < 2:
                return s

        if s[0] == s[1] == " ":
                return foo(s[1:])

        return s[0] + foo(s[1:])

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