patterns | A catalogue of Rust design patterns , anti-patterns | Architecture library

 by   rust-unofficial Shell Version: Current License: MPL-2.0

kandi X-RAY | patterns Summary

kandi X-RAY | patterns Summary

patterns is a Shell library typically used in Architecture applications. patterns has no bugs, it has no vulnerabilities, it has a Weak Copyleft License and it has medium support. You can download it from GitHub.

An open source book about design patterns and idioms in the Rust programming language that you can read here.
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            kandi-support Support

              patterns has a medium active ecosystem.
              It has 6769 star(s) with 297 fork(s). There are 201 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 66 open issues and 55 have been closed. On average issues are closed in 225 days. There are 5 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of patterns is current.

            kandi-Quality Quality

              patterns has 0 bugs and 0 code smells.

            kandi-Security Security

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

            kandi-License License

              patterns is licensed under the MPL-2.0 License. This license is Weak Copyleft.
              Weak Copyleft licenses have some restrictions, but you can use them in commercial projects.

            kandi-Reuse Reuse

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

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            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of patterns
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            patterns Key Features

            No Key Features are available at this moment for patterns.

            patterns Examples and Code Snippets

            Shift the pattern patterns
            javadot img1Lines of Code : 27dot img1License : Permissive (MIT License)
            copy iconCopy
            public static int[] KnuthMorrisPrattShift(char[] pattern) {
                    int patternSize = pattern.length;
            
                    int[] shift = new int[patternSize];
                    shift[0] = 1;
            
                    int i = 1, j = 0;
            
                    while ((i + j) < patternSize) {
                        
            Calculate the number of skipped patterns .
            javadot img2Lines of Code : 26dot img2License : Permissive (MIT License)
            copy iconCopy
            public int numberOfPatterns(int m, int n) {
                    //initialize a 10x10 matrix
                    int skip[][] = new int[10][10];
                    
                    //initialize indices of skip matrix (all other indices in matrix are 0 by default)
                    skip[1][3] = skip[3][1  
            Mask multiline patterns .
            javadot img3Lines of Code : 16dot img3License : Permissive (MIT License)
            copy iconCopy
            private String maskMessage(String message) {
                    if (multilinePattern == null) {
                        return message;
                    }
                    StringBuilder sb = new StringBuilder(message);
                    Matcher matcher = multilinePattern.matcher(sb);
                    while (m  

            Community Discussions

            QUESTION

            Get method called-as str in the callee
            Asked 2022-Mar-29 at 21:11

            I would like to introspect the tail end of a method call from the callee side.

            Right now I am doing this explicitly...

            ...

            ANSWER

            Answered 2022-Mar-29 at 21:11

            Per @jonathans comment, the raku docs state:

            A method with the special name FALLBACK will be called when other means to resolve the name produce no result. The first argument holds the name and all following arguments are forwarded from the original call. Multi methods and sub-signatures are supported.

            Source https://stackoverflow.com/questions/71667086

            QUESTION

            Differences in floating point between JDK 8 and JDK 13
            Asked 2022-Mar-20 at 18:16

            It seems that JDK 8 and JDK 13 have different floating points.
            I get on JDK 8, using Math:

            ...

            ANSWER

            Answered 2022-Mar-20 at 18:16

            This seems to be caused by a JVM intrinsic function for Math.cos, which is described in the related issue JDK-8242461. The behavior experienced there is not considered an issue:

            The returned results reported in this bug are indeed adjacent floating-point values [this is the case here as well]

            [...]

            Therefore, while it is possible one or the other of the returned values is outside of the accuracy bounds, just have different return values for Math.cos is not in and of itself evidence of a problem.

            For reproducible results, use the StrictMath.cos instead.

            And indeed, disabling the intrinsics using -XX:+UnlockDiagnosticVMOptions -XX:DisableIntrinsic=_dcos (as proposed in the linked issue), causes Math.cos to have the same (expected) result as StrictMath.cos.

            So it appears the behavior you are seeing here is most likely compliant with the Math documentation as well.

            Source https://stackoverflow.com/questions/71548717

            QUESTION

            Repeatedly removing the maximum average subarray
            Asked 2022-Feb-28 at 18:19

            I have an array of positive integers. For example:

            ...

            ANSWER

            Answered 2022-Feb-27 at 22:44

            This problem has a fun O(n) solution.

            If you draw a graph of cumulative sum vs index, then:

            The average value in the subarray between any two indexes is the slope of the line between those points on the graph.

            The first highest-average-prefix will end at the point that makes the highest angle from 0. The next highest-average-prefix must then have a smaller average, and it will end at the point that makes the highest angle from the first ending. Continuing to the end of the array, we find that...

            These segments of highest average are exactly the segments in the upper convex hull of the cumulative sum graph.

            Find these segments using the monotone chain algorithm. Since the points are already sorted, it takes O(n) time.

            Source https://stackoverflow.com/questions/71287550

            QUESTION

            Springboot: Better handling of error messages
            Asked 2022-Feb-03 at 10:12

            I'm developing an API with Spring Boot and currently, I'm thinking about how to handle error messages in an easily internationalizable way. My goals are as follows:

            1. Define error messages in resource files/bundles
            2. Connect constraint annotation with error messages (e.g., @Length) in a declarative fashion
            3. Error messages contain placeholders, such as {min}, that are replaced by the corresponding value from the annotation, if available, e.g., @Length(min = 5, message = msg) would result in something like msg.replace("{min}", annotation.min()).replace("{max}", annotation.max()).
            4. The JSON property path is also available as a placeholder and automatically inserted into the error message when a validation error occurs.
            5. A solution outside of an error handler is preferred, i.e., when the exceptions arrive in the error handler, they already contain the desired error messages.
            6. Error messages from a resource bundle are automatically registered as constants in Java.

            Currently, I customized the methodArgumentNotValidHandler of my error handler class to read ObjectErrors from e.getBindingResult().getAllErrors() and then try to extract their arguments and error codes to decide which error message to choose from my resource bundle and format it accordingly. A rough sketch of my code looks as follows:

            Input:

            ...

            ANSWER

            Answered 2022-Feb-03 at 10:12

            If I understood your question correctly....

            Below is example of exception handling in better way

            Microsoft Graph API - ERROR response - Example :

            Source https://stackoverflow.com/questions/70819069

            QUESTION

            Apache Beam Cloud Dataflow Streaming Stuck Side Input
            Asked 2022-Jan-12 at 13:12

            I'm currently building PoC Apache Beam pipeline in GCP Dataflow. In this case, I want to create streaming pipeline with main input from PubSub and side input from BigQuery and store processed data back to BigQuery.

            Side pipeline code

            ...

            ANSWER

            Answered 2022-Jan-12 at 13:12

            Here you have a working example:

            Source https://stackoverflow.com/questions/70561769

            QUESTION

            django rest Error - AttributeError: module 'collections' has no attribute 'MutableMapping'
            Asked 2022-Jan-07 at 19:13

            I'm build Django app, and it's work fine on my machine, but when I run inside docker container it's rest framework keep crashing, but when I comment any connection with rest framework it's work fine.

            • My machine: Kali Linux 2021.3
            • docker machine: Raspberry Pi 4 4gb
            • docker container image: python:rc-alpine3.14
            • python version on my machine: Python 3.9.7
            • python version on container: Python 3.10.0rc2

            error output:

            ...

            ANSWER

            Answered 2022-Jan-07 at 19:13

            You can downgrade your Python version. That should solve your problem; if not, use collections.abc.Mapping instead of the deprecated collections.Mapping.

            Refer here: Link

            Source https://stackoverflow.com/questions/69464512

            QUESTION

            Splitting owned array into owned halves
            Asked 2022-Jan-05 at 03:59

            I would like to divide a single owned array into two owned halves—two separate arrays, not slices of the original array. The respective sizes are compile time constants. Is there a way to do that without copying/cloning the elements?

            ...

            ANSWER

            Answered 2022-Jan-04 at 21:40
            use std::convert::TryInto;
            
            let raw = [0u8; 1024 * 1024];
                
            let a = u128::from_be_bytes(raw[..16].try_into().unwrap()); // Take the first 16 bytes
            let b = u64::from_le_bytes(raw[16..24].try_into().unwrap()); // Take the next 8 bytes
            

            Source https://stackoverflow.com/questions/70584662

            QUESTION

            Should I take `self` by value or mutable reference when using the Builder pattern?
            Asked 2021-Dec-19 at 02:26

            So far, I've seen two builder patterns in official Rust code and other crates:

            ...

            ANSWER

            Answered 2021-Dec-19 at 02:26

            Is it beneficial to build multiple values from the same builder?

            • If yes, use &mut self
            • If no, use self

            Consider std::thread::Builder which is a builder for std::thread::Thread. It uses Option fields internally to configure how to build the thread:

            Source https://stackoverflow.com/questions/70408356

            QUESTION

            R - mgsub problem: substrings being replaced not whole strings
            Asked 2021-Nov-04 at 19:58

            I have downloaded the street abbreviations from USPS. Here is the data:

            ...

            ANSWER

            Answered 2021-Nov-03 at 10:26
            Update

            Here is the benchmarking for the existing to OP's question (borrow test data from @Marek Fiołka but with n <- 10000)

            Source https://stackoverflow.com/questions/69467651

            QUESTION

            How does Python 3.10 match compares 1 and True?
            Asked 2021-Oct-17 at 05:34

            PEP 622, Literal Patterns says the following:

            Note that because equality (__eq__) is used, and the equivalency between Booleans and the integers 0 and 1, there is no practical difference between the following two:

            ...

            ANSWER

            Answered 2021-Oct-14 at 22:06

            Looking at the pattern matching specification, this falls under a "literal pattern":

            A literal pattern succeeds if the subject value compares equal to the value expressed by the literal, using the following comparisons rules:

            • Numbers and strings are compared using the == operator.
            • The singleton literals None, True and False are compared using the is operator.

            So when the pattern is:

            Source https://stackoverflow.com/questions/69577782

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

            Vulnerabilities

            No vulnerabilities reported

            Install patterns

            You can download it from GitHub.

            Support

            You are missing content in this repository that can be helpful for others, and you are eager to explain it? Awesome! We are always happy about new contributions (e.g. elaboration or corrections on certain topics) to this project. You can check the Umbrella issue for all the patterns, anti-patterns, and idioms that could be added. We suggest reading our Contribution guide to get more information on how contributing to this repository works.
            Find more information at:

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