Announcing Rust 1.76.0 | Rust Blog
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  • λλλ
    7·
    11 months ago

    Do you mind explaining? Maybe with the context of another languages equivalent?

    • anlumo@feddit.deEnglish
      152·
      10 months ago
      let bar: Result<T, E> = ...;
let foo = bar.inspect(|value| log::debug("{}", value));

      is equivalent to

      let bar: Result<T, E> = ...;
let foo = bar.map(|value| {
    log::debug("{}", value);
    value
});
      • xav
        1·
        10 months ago

        Warning: in the first case “value” is actually a shared reference, not a value.

    • GissaMittJobb@lemmy.ml
      2·
      11 months ago

      Looks vaguely like Stream::peek from Java, I think? There’s an equivalent method in Iterator::inspect.

    • owsei
      1·
      11 months ago

      it’s just a way to use map with a reference instead of the value, by what I understood.

      could be usefull for logging values in a Result so you can see it. However I think you can already do that by just mapping and returning the variable.