find_index_from_left

find_index_from_left :: (s: string, byte: u8, start_index := 0) -> s64

A negative start_index starts at the beginning.

Parameters

s: string

byte: u8

start_index := 0

Returns

s64

assert(find_index_from_left("a/b/c", #char "/") == 1);
assert(find_index_from_left("a/b/c", #char "/", 2) == 3);
assert(find_index_from_left("abc", #char "/") == -1);

find_index_from_left :: (s: string, substring: string, start_index := 0) -> s64

The index where substring first appears in s, searching from start_index, or -1 when it does not.

An empty substring is never found, so the result is -1. start_index must not be negative, or an assert fails (the byte overload accepts a negative one).

Parameters

s: string

substring: string

start_index := 0

Returns

s64

assert(find_index_from_left("banana", "ana") == 1);
assert(find_index_from_left("banana", "ana", 2) == 3);
assert(find_index_from_left("banana", "") == -1);