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rustlang's profile
Rust Language
Rust Language
Rust Language
@rustlang

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Rust Language

@rustlang

A programming language empowering everyone to build reliable and efficient software.

rust-lang.org
Joined July 2010

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    1. Michael Marcin‏ @EscJaeger 11 Feb 2019
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      Ch 2. More nice pkg management, console input is a bit verbose. Immutable default for variables is interesting, probably good but too soon to tell. Looking forward to seeing more interesting pattern matching. Not sure I like shadowing variables. #rustlang.

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    2. Michael Marcin‏ @EscJaeger 12 Feb 2019
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      Ch 3 goes over variable shadowing again, which I'm still not comfortable with, 0o prefix for octal is nice compared to C because it allows decimal literals with leading zeros. I get that a f32 suffix is consistent but I do prefer 1.5f to 1.5f32 #rustlang

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    3. Michael Marcin‏ @EscJaeger 12 Feb 2019
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      Good: fixed-sized array on the stack. Bad: pay for index validation on every array element access. First major thing I'm not happy with but maybe there's some overhead mitigation coming later. #rustlang

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    4. Michael Marcin‏ @EscJaeger 12 Feb 2019
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      "blocks of code evaluate the the last expression in them" lots of shenanigans seem to stem from this rule. The omission of a semicolon on the last line in a block changes the meaning drastically; that's going to take some getting used to. #rustlang

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    5. Michael Marcin‏ @EscJaeger 12 Feb 2019
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      Okay it implies you can avoid the runtime checks on element access by using a for each-like construct at least for simple iteration of the whole collection. That's at least a start. #rustlang

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    6. Michael Marcin‏ @EscJaeger 13 Feb 2019
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      Ch 4 looks to be about memory management. Discussing stack vs heap, no GC and RAII front and center, looking good. #rustlang

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    7. Michael Marcin‏ @EscJaeger 13 Feb 2019
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      Move assignment / pass-by-move by default for non-trivial types, explicit clone() operation for a copy. Looks to be a destructive move with a compiler error if you use a moved-from object. #rustlang

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    8. Michael Marcin‏ @EscJaeger 13 Feb 2019
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      Ran a few experiments. It's interesting what is and isn't allowed to compile with Rust move semantics. Here we can clearly see we won't ever actually move from s but still an error.pic.twitter.com/JrsRAtgkbP

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    9. Rust Language‏ @rustlang 15 Feb 2019
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      Replying to @EscJaeger

      Do you want comments on your comments? (And thanks for this thread!)

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    10. Michael Marcin‏ @EscJaeger 15 Feb 2019
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      Replying to @rustlang

      Sure! I expect my initial impressions are wrong or incomplete. Comments on my comments should just help me learn faster.

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      Rust Language‏ @rustlang 15 Feb 2019
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      Replying to @EscJaeger

      Cool! I’ll reply more later.

      9:54 AM - 15 Feb 2019
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