Function slice_string_between 

pub fn slice_string_between(str: &String, end: &str) -> Option<String>

Extracts a substring from the beginning of the given string up to the first occurrence of the specified delimiter.

Arguments

• str - A reference to the string to be processed.
• end - The delimiter string to search for.

Returns

An Option<String> containing the substring from the start of the string up to the delimiter, or None if the delimiter is not found.

Examples

use rust_string_utils::slice_string_between;
let str = String::from("hello world");
let result = slice_string_between(&str, " ");
assert_eq!(result, Some("hello".to_string()));