LEFTOF

s = LEFTOF (s1, s2)

Returns the left part of s1 at the position of the first occurrence of the string s2 in string s1. If s2 does not occure in string s1, an empty string will be returned.

Example

s1 = "abcdef"
s2 = "de"
print LEFTOF(s1, s2)      ' Output: abc