split_from_left

split_from_left :: (
    s: string,
    byte: u8
) -> (found: bool, left: string, right: string)

When the byte is not found the result is false, all of s and an empty string. Both parts point into s.

Parameters

s: string

byte: u8

Returns

found: bool

left: string

right: string

found, left, right := split_from_left("key=a=b", #char "=");
assert(found && left == "key" && right == "a=b");

found, left, right = split_from_left("none", #char "=");
assert(!found && left == "none" && right == "");

split_from_left :: (
    s: string,
    separator: string
) -> (found: bool, left: string, right: string)

Splits s at the first separator. Returns whether it was found, the part before it and the part after it.

When the separator is not found, or is empty, the result is false, all of s and an empty string.

Parameters

s: string

separator: string

Returns

found: bool

left: string

right: string

found, left, right := split_from_left("a::b::c", "::");
assert(found && left == "a" && right == "b::c");