45 lines
982 B
Rust
45 lines
982 B
Rust
//! Utility / Helper functions that don't really belong anywhere else
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use std::any::Any;
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/// Split a string, apply a closure to each substring,
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/// then join the string back together
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///
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/// For example:
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/// ```
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/// use stringqb::fns::split_map_join;
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///
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/// let result = split_map_join("a\n,b, c\t,d", ",", |s| s.trim().to_string());
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/// assert_eq!("a,b,c,d", result);
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/// ```
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pub fn split_map_join<'a>(
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string: &'a str,
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split_join_by: &str,
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map_fn: impl (FnMut(&'a str) -> String),
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) -> String {
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string
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.split(split_join_by)
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.into_iter()
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.map(map_fn)
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.collect::<Vec<String>>()
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.join(split_join_by)
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}
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pub fn get_typed_ref<T: 'static>(val: &Any) -> Option<&T> {
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if ! val.is::<T>() {
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return None;
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}
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val.downcast_ref::<T>()
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}
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pub fn get_typed_mut<T: 'static>(val: &mut Any) -> Option<&mut T> {
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if ! val.is::<T>() {
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return None;
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}
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val.downcast_mut::<T>()
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}
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#[cfg(test)]
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mod tests {}
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