(s1, s2)
return s1[0:k]
Return prefix common of 2 strings
Return prefix common of 2 strings
Return prefix common of 2 strings
def common_prefix(s1, s2):
    "Return prefix common of 2 strings"
    if not s1 or not s2:
        return ""
    k = 0
    while s1[k] == s2[k]:
        k = k + 1
        if k >= len(s1) or k >= len(s2):
            return s1[0:k]
    return s1[0:k]
def common_prefix ( s1 , s2 ) : if not s1 or not s2 : return "" k = 0 while s1 [ k ] == s2 [ k ] : k = k + 1 if k >= len ( s1 ) or k >= len ( s2 ) : return s1 [ 0 : k ] return s1 [ 0 : k ]