lazy | A lazy decoder for syntax

 by   kpu C++ Version: Current License: Non-SPDX

kandi X-RAY | lazy Summary

kandi X-RAY | lazy Summary

lazy is a C++ library. lazy has no bugs, it has no vulnerabilities and it has low support. However lazy has a Non-SPDX License. You can download it from GitHub.

this code takes in a hypergraph and a language model then outputs a sentence. it is split into a library (search/) and a standalone wrapper (alone/). the library is also in moses (-search-algorithm 5) and cdec (--incremental_search $lm). compiling requires boost >= 1.41. tested on linux. usage after compiling, the decoder is bin/decode. run without an argument for help. to run, you will need one language model, feature weights, and hypergraphs. the language model must be in arpa or kenlm format. pass -l lm where lm is the file name. feaure weights can be specified in a file using -w or on the command line with -w. weights are key=value pairs like cdec. the hard-coded features are languagemodel, languagemodel_oov, and wordpenalty. wordpenalty is word count times -1/ln(10) for odd historical reasons dating back to hiero. the feature definitions are compatible with moses and cdec. hypergraphs are stored in a directory with one file per sentence. the files are named starting with 0. the first line of each file is. then the file enumerates each vertex in bottom-up order (i.e. they can only reference vertices that have already
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            kandi-support Support

              lazy has a low active ecosystem.
              It has 15 star(s) with 2 fork(s). There are 2 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 4 open issues and 2 have been closed. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of lazy is current.

            kandi-Quality Quality

              lazy has 0 bugs and 0 code smells.

            kandi-Security Security

              lazy has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              lazy code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              lazy has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              lazy releases are not available. You will need to build from source code and install.

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            lazy Key Features

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            lazy Examples and Code Snippets

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            Community Discussions

            QUESTION

            Why does foldl' use a lot of RAM with complex data structures?
            Asked 2022-Apr-03 at 01:58

            Lazy fold uses a lot of RAM. In Data.List, foldl' provides a left fold that uses strict evaluation. For example, the following computes the sum of 10 million zeros with little increase in RAM usage.

            ...

            ANSWER

            Answered 2022-Apr-03 at 01:58

            foldl' only evaluates the intermediate state to weak head normal form—i.e. up to the first constructor. That's the most a generic function can do, and what functions that are called "strict" generally do. Evaluating (x1, y1) <+> (x2, y2) until it looks like a constructor gives (x1 + x2, y1 + y2), where the parts are still unevaluated (they have been "protected" by the (,)). Through the iteration, foldl' being strict keeps the state in the form (_, _) instead of (_, _) <+> (_, _) <+> ..., but the _s grow into huge unevaluated terms of form _ + _ + _ + ....

            Modify <+> to evaluate the additions before it exposes the constructor.

            Source https://stackoverflow.com/questions/71625997

            QUESTION

            Raku Ambiguous call to infix(Hyper: Dan::Series, Int)
            Asked 2022-Mar-31 at 13:17

            I am writing a model Series class (kinda like the one in pandas) - and it should be both Positional and Associative.

            ...

            ANSWER

            Answered 2022-Mar-31 at 13:17
            Take #1

            First, an MRE with an emphasis on the M1:

            Source https://stackoverflow.com/questions/70643520

            QUESTION

            Escaping metacharacters in a Raku regex (like Perl's quotemeta() or \Q...\E)?
            Asked 2022-Mar-29 at 23:38

            How can I escape metacharacters in a Raku regex the way I would with Perl's quotemeta function (\Q..\E)?

            That is, the Perl code

            ...

            ANSWER

            Answered 2022-Feb-10 at 00:03
            Your question's answer:

            You can treat characters in a Raku regex literally by surrounding them with quotes (e.g., '.*?') or by using using regular variable interpolation (e.g., $substring inside the regex where $substring is a string contaning metacharacters).

            Thus, to translate the Perl program with \Q...\E from your question into Raku, you could write:

            Source https://stackoverflow.com/questions/71057626

            QUESTION

            How would you implement a lazy "range factory" for C++20 ranges that just calls a generator function?
            Asked 2022-Feb-17 at 17:10

            I like the idea of the lazy ranges you can make with std::views::iota but was surprised to see that iota is currently the only thing like it in the standard; it is the only "range factory" besides views::single and views::empty. There is not currently, for example, the equivalent of std::generate as a range factory.

            I note however it is trivial to implement the semantics of generate by using a transform view on iota and just ignoring the value iota passes to transform i.e.

            ...

            ANSWER

            Answered 2022-Feb-17 at 17:10

            The reason why generate2 cannot work is that it does not model the range concept, that is, the type returned by its begin() does not model input_iterator, because input_iterator requires difference_type and value_type to exist and i++ is a valid expression.

            In addition, your iterator does not satisfy sentinel_for, which means that it cannot serve as its own sentinel, because sentinel_for requires semiregular which requires default_initializable, so you also need to add default constructors for it.

            You also need to rewrite bool operator!=(...) to bool operator==(...) const since operator!= does not reverse synthesize operator==. But it's easier to just use default_sentinel_t as sentinel in your case.

            if you add them to iterator you will find the code will be well-formed:

            Source https://stackoverflow.com/questions/71148130

            QUESTION

            Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: Package subpath './lib/tokenize' is not defined by "exports" in the package.json of a module in node_modules
            Asked 2022-Jan-31 at 17:22

            This is a React web app. When I run

            ...

            ANSWER

            Answered 2021-Nov-13 at 18:36

            I am also stuck with the same problem because I installed the latest version of Node.js (v17.0.1).

            Just go for node.js v14.18.1 and remove the latest version just use the stable version v14.18.1

            Source https://stackoverflow.com/questions/69693907

            QUESTION

            How to use of laziness in Scheme efficiently?
            Asked 2021-Dec-30 at 10:19

            I am trying to encode a small lambda calculus with algebraic datatypes in Scheme. I want it to use lazy evaluation, for which I tried to use the primitives delay and force. However, this has a large negative impact on the performance of evaluation: the execution time on a small test case goes up by a factor of 20x.

            While I did not expect laziness to speed up this particular test case, I did not expect a huge slowdown either. My question is thus: What is causing this huge overhead with lazy evaluation, and how can I avoid this problem while still getting lazy evaluation? I would already be happy to get within 2x the execution time of the strict version, but faster is of course always better.

            Below are the strict and lazy versions of the test case I used. The test deals with natural numbers in unary notation: it constructs a sequence of 2^24 sucs followed by a zero and then destructs the result again. The lazy version was constructed from the strict version by adding delay and force in appropriate places, and adding let-bindings to avoid forcing an argument more than once. (I also tried a version where zero and suc were strict but other functions were lazy, but this was even slower than the fully lazy version so I omitted it here.)

            I compiled both programs using compile-file in Chez Scheme 9.5 and executed the resulting .so files with petite --program. Execution time (user only) for the strict version was 0.578s, while the lazy version takes 11,891s, which is almost exactly 20x slower.

            Strict version ...

            ANSWER

            Answered 2021-Dec-28 at 16:24

            This sounds very like a problem that crops up in Haskell from time to time. The problem is one of garbage collection.

            There are two ways that this can go. Firstly, the lazy list can be consumed as it is used, so that the amount of memory consumed is limited. Or, secondly, the lazy list can be evaluated in a way that it remains in memory all of the time, with one end of the list pinned in place because it is still being used - the garbage collector objects to this and spends a lot of time trying to deal with this situation.

            Haskell can be as fast as C, but requires the calculation to be strict for this to be possible.

            I don't entirely understand the code, but it appears to be recursively creating a longer and longer list, which is then evaluated. Do you have the tools to measure the amount of memory that the garbage collector is having to deal with, and how much time the garbage collector runs for?

            Source https://stackoverflow.com/questions/70501342

            QUESTION

            Why can't I iterate after an assignment in Raku?
            Asked 2021-Dec-23 at 22:40

            Given the following code, it seems that I cannot iterate over a Buf if it had been assigned to a variable, unless I cast it to a list, even though it's not a lazy sequence. What gives?

            ...

            ANSWER

            Answered 2021-Dec-23 at 22:40

            The reason it fails, is that:

            Source https://stackoverflow.com/questions/70438803

            QUESTION

            Const variable returns two different values
            Asked 2021-Dec-16 at 17:10

            Today I did some tests on the nightly module std::lazy. It works well in local variable. However, when I defined a const variable, it gave me two different values. Seems the Colsure is called multiple times.

            ...

            ANSWER

            Answered 2021-Dec-15 at 09:27

            This is my code, can anyone tell me why?

            Because you're confusing const and static.

            Per the official documentation:

            A constant item is an optionally named constant value which is not associated with a specific memory location in the program. Constants are essentially inlined wherever they are used, meaning that they are copied directly into the relevant context when used. This includes usage of constants from external crates, and non-Copy types. References to the same constant are not necessarily guaranteed to refer to the same memory address.

            (note that the phrasing of the last sentence indicates consts could be promoted to statics and share a memory address, but there's no guarantee there, and while statics can be inlined it probably should not be observable through safe rust so should mostly be irrelevant).

            In essence, your snippet is semantically equivalent to:

            Source https://stackoverflow.com/questions/70360465

            QUESTION

            Getting the last element of a lazy Seq in Raku
            Asked 2021-Dec-12 at 15:33

            I want to get the last element of a lazy but finite Seq in Raku, e.g.:

            ...

            ANSWER

            Answered 2021-Dec-04 at 19:49

            What you're asking about ("get[ing] the last element of a lazy but finite Seq … while keeping the original Seq lazy") isn't possible. I don't mean that it's not possible with Raku – I mean that, in principle, it's not possible for any language that defines "laziness" the way Raku does with, for example, the is-lazy method.

            If particular, when a Seq is lazy in Raku, that "means that [the Seq's] values are computed on demand and stored for later use." Additionally, one of the defining features of a lazy iterable is that it cannot know its own length while remaining lazy – that's why calling .elems on a lazy iterable throws an error:

            Source https://stackoverflow.com/questions/70228056

            QUESTION

            Proper way to DI NSwag auto-generated client
            Asked 2021-Dec-04 at 10:51

            What is the preferred way to make a VS connected service (NSwag) injected into classes/controllers. I have found a lot of suggestions on the net to use this form:

            ...

            ANSWER

            Answered 2021-Sep-26 at 13:24

            Ok, I actually solved this problem by poking around through OpenApiReference, but it requires manual modification of csproj file. Additional Options node has to be added to OpenApiReference item group, to instruct NSwag to NOT expose BaseUrl and to also generate an interface, which eases the work with setting up DI without additional code.

            Visual Studio team should really add these two checkboxes to Connected Services screens/configuration for OpenAPI.

            Source https://stackoverflow.com/questions/69333244

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

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            You can download it from GitHub.

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