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57 lines
1.2 KiB
57 lines
1.2 KiB
use std::fmt;
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pub trait FlatJoinStrsExt: Sized
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{
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/// Join an iterator of iterators of strings with a seperator `str`
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fn flat_join(self, with: &str) -> String;
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}
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pub trait JoinStrsExt: Sized
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{
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/// Join an iterator of strings with a seperator `str`.
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fn join(self, with: &str) -> String;
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}
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impl<T,I> JoinStrsExt for I
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where I: IntoIterator<Item=T>,
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T: fmt::Display
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{
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/// Join an iterator of `str` with a seperator
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fn join(self, with: &str) -> String
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{
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let mut output = String::new();
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let mut first=true;
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for string in self.into_iter()
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{
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if !first {
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output.push_str(with);
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}
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let string = string.to_string();
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output.push_str(&string[..]);
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first=false;
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}
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output
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}
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}
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impl<I, I2, T> FlatJoinStrsExt for I
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where I: IntoIterator<Item = I2>,
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I2: IntoIterator<Item = T>,
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T: fmt::Display
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{
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fn flat_join(self, with: &str) -> String
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{
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let mut output = String::new();
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let mut first=true;
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for string in self.into_iter()
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{
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if !first {
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output.push_str(with);
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}
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let string: String = string.into_iter().map(|x| x.to_string()).collect();
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output.push_str(&string[..]);
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first=false;
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}
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output
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}
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}
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