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b18a8c3036
To understand From-based conversion, an understanding of traits is required, which we teach in a later chapter. The From trait specifically is taught in one of the conversion exercises. So, we can safely remove it here without users missing out on learning something important. A specific source of confusion for users was a warning that the conversion is useless, which appeared when using the `string_slice` function for the expression with `.into()`. closes #2190
30 lines
633 B
Rust
30 lines
633 B
Rust
fn string_slice(arg: &str) {
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println!("{arg}");
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}
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fn string(arg: String) {
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println!("{arg}");
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}
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fn main() {
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string_slice("blue");
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string("red".to_string());
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string(String::from("hi"));
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string("rust is fun!".to_owned());
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string(format!("Interpolation {}", "Station"));
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// WARNING: This is byte indexing, not character indexing.
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// Character indexing can be done using `s.chars().nth(INDEX)`.
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string_slice(&String::from("abc")[0..1]);
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string_slice(" hello there ".trim());
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string("Happy Monday!".replace("Mon", "Tues"));
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string("mY sHiFt KeY iS sTiCkY".to_lowercase());
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}
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