titus.util.negativeIndex¶

titus.util.negativeIndex(length, index)[source]¶

Helper function for interpreting negative array indexes as counting from the end of the array (just like Python).

Parameters:	length (non-negative integer) – length of the array in question index (integer) – index to interpret
Return type:	non-negative integer
Returns:	if negative, count from the end of the array; otherwise, pass-through