Although it is possible to write a closure to split on arbitrarily complex conditions, it easier to use regex crate for splitting based on regular expressions.
Another approach without using a closure would be to make use of string slice patterns. As an example, we can write the above split as,
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for s in message.split(&['|',';'][..]){
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// ...
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}
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Splits can be collected to a vector and other types of Rust collections with collect method.
How to split a string based on regular expressions?
Splitting a string such as "hello there; how| are|you, chathura" based on multiple characters and taking into account multiple spaces is not simple without using regular expressions.
Following solution demonstrates the use of regex crate to accomplish the task.
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fnsplit_by_regex(){
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let message ="hello there; how| are|you, Chathura";
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let re =regex::Regex::new(r"[;,|\s]\s*").unwrap();