30 lines
1.1 KiB
Plaintext
30 lines
1.1 KiB
Plaintext
use std::ascii::AsciiExt; // for case insensitives only
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fn main() {
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// only same types can be compared
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// String and String or &str and &str
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// exception: strict equality and inequality also work on &str and String
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let a: &str = "abc";
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let b: String = "Bac".to_owned();
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// Strings are coerced to &str when borrowed and needed
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if a == b { println!("The strings are equal") }
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if a != b { println!("The strings are not equal") }
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if a > &b { println!("The first string is lexically after the second") }
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if a < &b { println!("The first string is lexically before the second") }
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if a >= &b { println!("The first string is not lexically before the second") }
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if a <= &b { println!("The first string is not lexically after the second") }
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// case-insensitives:
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// equality
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// this avoids new allocations
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if a.eq_ignore_ascii_case(&b) { println!("Both strings are equal when ignoring case") }
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// everything else, create owned Strings, then compare as above
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let a2 = a.to_ascii_uppercase();
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let b2 = b.to_ascii_uppercase();
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// repeat checks
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}
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