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Formatting and new contribs for 2014-11-10
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‎content/2014-11-10-this-week-in-rust.markdown

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# Approved RFC's
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* [Num reform](https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md): Strips down `std::num` to minimally support generic primitive numbers, without supporting a full mathematical hierarchy.
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* [Higher-ranked trait bounds](https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md): Add the ability to have trait bounds that are polymorphic over lifetimes. Necessary for unboxed closures.
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* [un-feature-gating struct variants](https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md): Woo!
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* [Multiple lifetime bounds](https://github.com/rust-lang/rfcs/blob/master/text/0192-bounds-on-object-and-generic-types.md): Removes special cases from the type system and makes more complex lifetime relationships be expressed that were previously only inferable.
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# New RFC's
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* [Macro reform](https://github.com/rust-lang/rfcs/pull/453): Prepares macros for 1.0 stabilization. Renames `macro_rules!` to `macro!`, and introduces more robust support for module importing and exporting.
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* [Change integer fallback RFC to suggest `i32` instead of `int` as the fallback](https://github.com/rust-lang/rfcs/pull/452): Changes the fallback for performance and portability.
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* [Un-feature-gate if let and tuple indexing](https://github.com/rust-lang/rfcs/pull/450): The features are well-behaved and used by many projects; ship 'em!
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* [Prohibit unused type parameters in impls](https://github.com/rust-lang/rfcs/pull/453): Require that every impl type parameter appears textually within the input type parameters of the trait reference or the impl self type.
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* [ES6-style unicode string escaping](https://github.com/rust-lang/rfcs/pull/446): Remove `\u203D` and `\U0001F4A9` unicode string escapes, and add ECMAScript 6-style `\u{1F4A9}` escapes instead. Strong positive feedback, some concern with how it interacts with format strings.
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* [extension trait conventions](https://github.com/rust-lang/rfcs/pull/445): Establishes a definition and naming convention for extension traits: traits which aren't intended for generic programing, but instead extending existing types. If extending a `Foo`, use `FooExt`. If Extending a `Foo` when it impls another trait like `Add`, use `FooAddExt`.
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* [cmp and ops reform](https://github.com/rust-lang/rfcs/pull/439): Refactors `Cmp` and the operator overloading traits. Generally positive feedback. Highlights include:
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* Make basic unary and binary operators work by value and use associated types.
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* Generalize comparison operators to work across different types; drop Equiv.
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* Refactor slice notation in favor of range notation so that special traits are no longer needed.
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* Add IndexSet to better support maps.
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* Clarify ownership semantics throughout.
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* Make basic unary and binary operators work by value and use associated types.
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* Generalize comparison operators to work across different types; drop Equiv.
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* Refactor slice notation in favor of range notation so that special traits are no longer needed.
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* Add IndexSet to better support maps.
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* Clarify ownership semantics throughout.
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* [Change precedence of `+` in type grammar](https://github.com/rust-lang/rfcs/pull/438): Update type grammar to make `+` have lower precedence, consistent with the expression grammar, resolving a grammatical ambiguity.
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* [Relocate and improve c_str](https://github.com/rust-lang/rfcs/pull/435):
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* Move the c_str module out of std to rid the latter of type dependencies on libc.
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* Split the current CString into a low-level type CStrBuf and a length-aware CString to make computation costs explicit.
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* Provide custom destructors and purpose-specific, mnemonically named constructors.
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* Add some methods and trait implementations to make the types more useful.
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* Remove the Clone implementation due to lack of purpose.
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Lots of discussion of how to structure libc, not a lot of consensus.
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* Move the c_str module out of std to rid the latter of type dependencies on libc.
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* Split the current CString into a low-level type CStrBuf and a length-aware CString to make computation costs explicit.
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* Provide custom destructors and purpose-specific, mnemonically named constructors.
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* Add some methods and trait implementations to make the types more useful.
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* Remove the Clone implementation due to lack of purpose.
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* [rename `lifetime` to `scope`](https://github.com/rust-lang/rfcs/pull/431): Highly controversial. Some community members argue that this change in terminology has been much more effective when introducing the actual concepts to newbies. Others argue that scope is already a well established concept in programming languages.
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* [Finalizing more naming conventions](https://github.com/rust-lang/rfcs/pull/430): finalizes a few long-running de facto conventions, including capitalization/underscores, and the role of the unwrap method. Generally positive feedback, some discussion of naming consts like enum variants.
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* [Reserve macro identifiers](https://github.com/rust-lang/rfcs/pull/456): Preemptively reserve a class of $ identifiers for allowing backwards compatible improvements to the macro system.
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# Community
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## From the Team
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* [Weekly-meetings/2014-11-04 (macros; multiple lifetime bounds; macro invocation syntax; higher-ranked trait bounds; pub trait methods; out-of-sync nightlies; struct variants; numerics)](https://github.com/rust-lang/meeting-minutes/blob/master/weekly-meetings/2014-11-04.md)
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* [Discuss](https://github.com/rust-lang/meeting-minutes/blob/master/weekly-meetings/2014-11-04.md)
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* [Reddit](http://www.reddit.com/r/rust/comments/2lrt7b/weeklymeetings20141104_macros_multiple_lifetime/)
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* [Discuss](https://github.com/rust-lang/meeting-minutes/blob/master/weekly-meetings/2014-11-04.md)
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* [Reddit](http://www.reddit.com/r/rust/comments/2lrt7b/weeklymeetings20141104_macros_multiple_lifetime/)
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* [Weekly-meetings/2014-10-30 (error conventions; cargo; namespaced enums; trait-based error handling; macro unification; coercions; dynamic linking, byte literals, failing dtors)](https://github.com/rust-lang/meeting-minutes/blob/master/weekly-meetings/2014-10-30.md)
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* [Discuss](http://discuss.rust-lang.org/t/weekly-meetings-2014-10-30-error-conventions-cargo-namespaced-enums-trait-based-error-handling-macro-unification-coercions-dynamic-linking-byte-literals-failing-dtors/734)
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* [Reddit](http://www.reddit.com/r/rust/comments/2kuppu/weeklymeetings20141030_error_conventions_cargo/)
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* [Discuss](http://discuss.rust-lang.org/t/weekly-meetings-2014-10-30-error-conventions-cargo-namespaced-enums-trait-based-error-handling-macro-unification-coercions-dynamic-linking-byte-literals-failing-dtors/734)
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* [Reddit](http://www.reddit.com/r/rust/comments/2kuppu/weeklymeetings20141030_error_conventions_cargo/)
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* [IRC notifications now going to #rust-bots](http://discuss.rust-lang.org/t/irc-notifications-now-going-to-rust-bots/735): If you have a bot you'd like to post here (which would be awesome!) please add a description and contact to [the wiki page](https://github.com/rust-lang/rust/wiki/IRC-notifications-channel).
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## Videos
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* [An introduction to Servo](https://air.mozilla.org/an-introduction-to-servo/): Lars Bergstrom from the Research team provides an overview of the Servo project, demonstrates its current status, and shows how to contribute to it.
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* [November's Bay Area meetup](https://air.mozilla.org/bay-area-rust-meetup-november-2014/) happened
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on Thursday, featuring five presentations about Servo and browser architecture.
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## Blog Posts
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* [This Week In Servo (10)](http://blog.servo.org/2014/11/04/twis-10/)
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* [Rewriting Rust Serialization, Part 2: Performance](http://erickt.github.io/blog/2014/11/03/performance/): A quick look at how Rust's JSON serialization performance compares to other languages and protocols.
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* [Improved Error Handling in Rust](http://lucumr.pocoo.org/2014/11/6/error-handling-in-rust/): Some discussion of how Rust currently and theoretically handles erroes.
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* [Don't Panic! The Hitchhiker's Guide to Unwinding](http://lucumr.pocoo.org/2014/10/30/dont-panic/): A nice discussion of the challenges of safe and ergonomic error handling, and how it relates to stack unwinding.
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* [Let's build a browser engine! Part 7: Painting 101](http://limpet.net/mbrubeck/2014/11/05/toy-layout-engine-7-painting.html): Part of a longer series on writing a browser engine in Rust. *In this article, I will add very basic painting code.*
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* [On pattern matching performance in Rust](http://www.cjqed.com/blog/rust-pattern-matching-performance/): A quick look at how the `match` statement can produce really efficient code.
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* [Rust and Go](https://medium.com/@adamhjk/rust-and-go-e18d511fbd95): A quick look at Rust and Go from the perspective of a sysadmin used to high-level programming languages.
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* [Learning Rust](http://foon.uk/rust.html): *Inspired by Artyom's Learning Racket series, I've decided to log my efforts in learning Rust. I'm going to document my learning process as I go about trying to build a roguelike in Rust. I've downloaded the compiler, skimmed the getting started guide, and written “Hello World”. So let's get started!*
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## Discuss
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* [Pre-RFC: placement box with Placer trait](http://discuss.rust-lang.org/t/pre-rfc-placement-box-with-placer-trait/729/6): Add user-defined placement box expression (more succinctly, "a box
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expression"), an operator analogous to "placement new" in C++. This
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provides a way for a user to specify (1.) how the backing storage for
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some datum should be allocated, (2.) that the allocation should be
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ordered before the evaluation of the datum, and (3.) that the datum
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should preferably be stored directly into the backing storage (rather
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than temporary storage on the stack and then copying the datum from
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the stack into the backing storage).
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* [Pre-RFC: placement box with Placer
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trait](http://discuss.rust-lang.org/t/pre-rfc-placement-box-with-placer-trait/729/6):
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Add user-defined placement box expression (more succinctly, "a box
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expression"), an operator analogous to "placement new" in C++. This
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provides a way for a user to specify (1.) how the backing storage
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for some datum should be allocated, (2.) that the allocation should
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be ordered before the evaluation of the datum, and (3.) that the
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datum should preferably be stored directly into the backing storage
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(rather than temporary storage on the stack and then copying the
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datum from the stack into the backing storage).
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* [Forbid -(unsigned integer)](http://discuss.rust-lang.org/t/forbid-unsigned-integer/752): the eternal struggle continues. It's super handy when you want it, but also a common error to make.
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* [Moving all built-in macros to plugins](http://discuss.rust-lang.org/t/moving-all-built-in-macros-to-plugins/737): Another proposal to handle some of the issues with macros for 1.0. May make it easier to bootstrap changes to the compiler.
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* [Lifetime Notation](http://discuss.rust-lang.org/t/lifetime-notation/751): `&'a` -> `a&`. Some discussion of tradeoffs and details.
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## Reddit
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* [Warning! Some collection methods have had their semantics changed transparently!](http://www.reddit.com/r/rust/comments/2ljfnd/warning_some_collection_methods_have_had_their/)
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* [Error interoperation now available in the nightlies](https://www.reddit.com/r/rust/comments/2l98pn/error_interoperation_now_available_in_the/)
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* [Trait-based Exception handling RFC postponed until after 1.0](http://www.reddit.com/r/rust/comments/2l8x2a/traitbased_exception_handling_rfc_postponed_till/)
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* [Cargo now supports build-scripts!](http://www.reddit.com/r/rust/comments/2lgyne/cargo_now_support_build_scripts_xpost_rrust/)
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* [What libraries would you like to see implemented in Rust?](https://www.reddit.com/r/rust/comments/2lmt99/what_libraries_would_you_like_to_see_implemented/)
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* [How good do you think the market for Rust developers will be 5 years from now, and in what area of programming?](http://www.reddit.com/r/rust/comments/2l3l07/rust_is_undoubtedly_one_of_the_upandcoming_big/)
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* [I think Rust and I were made for each other](http://www.reddit.com/r/rust/comments/2ljrp2/i_think_rust_and_i_were_meant_for_each_other/)
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* [How does the Rust community feel about FFI?](https://www.reddit.com/r/rust/comments/2lmkjw/how_does_the_rust_community_feel_about_ffi/)
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* [How do you refactor Rust code?](https://www.reddit.com/r/rust/comments/2lo21r/how_do_you_refactor_rust_code/)
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* [I may start contributing to Rust...can I get a few pointers?](http://www.reddit.com/r/rust/comments/2lduv6/i_may_start_contributing_to_rustcan_i_get_a_few/)
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## New Projects
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* [this-week-in-rust](https://github.com/cmr/this-week-in-rust): This Week in Rust's content is now publicly hosted in a Github repo! If you find any errors, just submit a PR to the relevant markdown file in `/content`! If you'd like to help out, please contact cmr, brson, or Gankro on Github/Reddit/IRC.
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* [rustaceans.org](http://rustaceans.org/): *This website is for finding Rustaceans. Wondering who is behind that GitHub username or IRC nick? Here is where to find out.*
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* [rust-modifier](https://github.com/reem/rust-modifier): *Convenient chaining APIs for free*
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* [dockerfiles](https://github.com/schickling/dockerfiles): *Collection of lightweight and ready-to-use docker images*
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* [Window Tiling For The Win](https://github.com/Kintaro/wtftw): *A tiling window manager written in Rust*
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* [cxx2rs](https://github.com/manuels/cxx2rs): *A rust-binding generator for C/C++ files*
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* [sorting-rs](https://github.com/wackywendell/sorting-rs): *This is a set of sorting algorithms, written in Rust.*
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* [rust-chatserver](https://github.com/BytePrelude/rust-chatserver): *A barebone command line TCP chatserver written in Rust*. [Looking for feedback](https://www.reddit.com/r/rust/comments/2lpsj8/tcp_chatserver_written_in_rust_looking_for/).
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* [rust-irc](https://github.com/viperscape/rust-irc): *A simple example irc implementation*. [Looking for feedback](https://www.reddit.com/r/rust/comments/2lpw9k/rust_irc_example_looking_for_feedback/)
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* [rusqlite](https://github.com/jgallagher/rusqlite): *Ergonomic, semi-safe bindings to SQLite for Rust*
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# New Contributors
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* Cristi Burcă
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* juxiliary
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* Nathan Zadoks
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* qwitwa
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* Sean Jensen-Grey
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* Subhash Bhushan
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* thiagopnts
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* tshakah
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* Vitali Haravy
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* Vladimir Matveev
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* whataloadofwhat

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