algs4 | Algorithms , 4th edition textbook code and libraries | Learning library

 by   kevin-wayne Java Version: Current License: GPL-3.0

kandi X-RAY | algs4 Summary

kandi X-RAY | algs4 Summary

algs4 is a Java library typically used in Institutions, Learning, Education, Tutorial, Learning, Example Codes applications. algs4 has no bugs, it has no vulnerabilities, it has build file available, it has a Strong Copyleft License and it has medium support. You can download it from GitHub.

Algorithms, 4th edition textbook code and libraries
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            kandi-support Support

              algs4 has a medium active ecosystem.
              It has 7234 star(s) with 2661 fork(s). There are 393 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 12 open issues and 48 have been closed. On average issues are closed in 114 days. There are 7 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of algs4 is current.

            kandi-Quality Quality

              algs4 has 0 bugs and 0 code smells.

            kandi-Security Security

              algs4 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              algs4 code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              algs4 is licensed under the GPL-3.0 License. This license is Strong Copyleft.
              Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

            kandi-Reuse Reuse

              algs4 releases are not available. You will need to build from source code and install.
              Build file is available. You can build the component from source.
              Installation instructions are available. Examples and code snippets are not available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed algs4 and discovered the below as its top functions. This is intended to give you an instant insight into algs4 implemented functionality, and help decide if they suit your requirements.
            • Test the unit test
            • Place a key - value pair into symbol table
            • Returns the value associated with the given key
            • Removes a symbol from the symbol table
            • Test a unit test
            • Removes a key from the set
            • Adds a key to the set
            • Test for unit tests
            • Reads the next character from the input stream
            • Entry point for the indexMaxPQ
            • Prints Interval1D
            • Verifies the solution is feasible
            • Creates a new DAG
            • Creates a Topological X
            • Test data type
            • Main method
            • Reads the segment tree
            • Checks the optimisation conditions
            • Augments the augmenting path
            • Checks that the graph is valid
            • Test the unit tests
            • Test program
            • Test for a Gauss model
            • Demonstrates how to test the FloydW marshall algorithm
            • Test to unit tests
            • Creates a random digraph with strong components
            Get all kandi verified functions for this library.

            algs4 Key Features

            No Key Features are available at this moment for algs4.

            algs4 Examples and Code Snippets

            Returns the RGB color of the image .
            javadot img1Lines of Code : 3dot img1License : Permissive (MIT License)
            copy iconCopy
            private int getRGBColor(int x, int y, int channel) {
                    return pic[xyTo1D(x, y)] >> channel & 0xFF;
                }  

            Community Discussions

            QUESTION

            Java Cannot Load Main Class Without Adding .java
            Asked 2021-Oct-24 at 16:08

            I'm trying to run a Java class file which I've compiled, but it keeps telling me that it cannot find or load the main class.

            I have a directory which looks like this:

            My goal is to run the RandomWord.java file, which takes in a file input and relies on the algs4.jar file found in the .lift sub-directory. From what I've seen, to compile, I need to run the following (assuming I'm cd'ed into the hello directory):
            $ javac -cp .lift/algs4.jar RandomWord.java
            This should create my RandomWord.class file. Now, to run it with a txt file, for example with coin.txt, I believe I should be running the following:
            $ java -cp .lift/algs4.jar RandomWord < coin.txt
            However, this results in an error stating: Error: Could not find or load main class RandomWord.

            I've done a ton of experimenting with this but I have no idea what's going on, but I've found that running the following works:
            $ java -cp .lift/algs4.jar RandomWord.java < coin.txt
            However, I believe when a .class file is created, I shouldn't be writing .java in my command line, so I'm really confused.

            ...

            ANSWER

            Answered 2021-Oct-24 at 16:08

            QUESTION

            compareTo with objects returns a false while it is true
            Asked 2021-Mar-28 at 18:26

            I am trying to check whether my levelorder of my Binary Search Tree is equal to the other one. To do this, I tried to make a compareTo method. I only give equal values to the method, but it keeps on saying the condition is false. When I place breakpoints, I see that the values are still equal. I am probably not understanding it correctly. Does anyone know how to solve this?

            Here is what I did, as you can see below, the compareTo returns a 1 instead of a 0:

            ...

            ANSWER

            Answered 2021-Mar-28 at 15:47

            When you're using the == operator you're actually checking to see if the references point to the same object in memory. From your debugging screenshot you can see that they are not. this.e points to object Queue@817 while o.e points to Queue@819.

            Source https://stackoverflow.com/questions/66843044

            QUESTION

            How to save permutation in a Set Java
            Asked 2021-Mar-27 at 22:55

            I have this method that prints my permutations of a Set I'm giving with my parameters. But I need to save them in 2 separate sets and compare them. So, for instance I have [5,6,3,1] and [5,6,1,3], by adding them in two separate BST, I can compare them by using the compareTo function to check whether their level order is the same. But I am having trouble with saving these permutations from my method into a set in my main. Does anyone know how to save these into a set?

            What I have now:

            ...

            ANSWER

            Answered 2021-Mar-27 at 22:55

            I'm not sure if I understood your idea but maybe this will help:

            Yours combos method will return set of all permutations (as Stacks)

            Source https://stackoverflow.com/questions/66836224

            QUESTION

            How to show top to bottom leaks in my path
            Asked 2021-Feb-02 at 16:19

            I used the percolation class from the algs4.jar library, where you can simulate a whole labyrinth and see where the leaks are. I want to show the leaks that are from top to bottom, but now I get to see all of the leaks.

            Does anyone know how I can see only the leaks that are percolations?

            I thought maybe using dfs from the flow method in de Percolation.java class, and say something like only show when index i in rows is maxlength and marked but I don't really know how to say that, because I am not sure if this statement will show the entire leak of just the max length leak.

            code I run AssignmentTwo.java:

            ...

            ANSWER

            Answered 2021-Feb-02 at 16:19

            It seems that disabling double buffering will get you the result you want:

            Source https://stackoverflow.com/questions/65994196

            QUESTION

            How to count number of edges between red and white nodes in a graph?
            Asked 2020-Oct-07 at 19:35

            I would like to count how many edges there are that goes between a white and a red node. The red nodes are the ones in the new int[] in the main method.

            Provided code for the assignment:

            ...

            ANSWER

            Answered 2020-Oct-07 at 19:14

            To be fair I code in C++, not java, but here's a question: Why does your marked() function return the value of a marked array? Wouldn't it make more sense to use that array directly?

            For the time being I can tell you are using a DFS to traverse the graph correctly. I am not sure, however, why you are traversing the graph at all.

            I am sorry, but this is going to be one of these "don't do this, do that instead" answers.

            If you are looking for a linear solution (for one execution of the count method), you better just create an array which, for each node holds info about whether it is white or red. I'd recommend filling it with zeroes, and then going over the rednodes array to change appropriate values to 1.

            Next, you declare a result variable equal to zero, which will count the number of edges which connect to nodes of different colours. You iterate over all the edges, and check if the vertices they connect are of varying colours. If so, increment the result variable.

            Source https://stackoverflow.com/questions/64246492

            QUESTION

            How to use read file from URI using C# in PowerShell line by line?
            Asked 2020-Sep-25 at 03:48

            Am trying to incorporate some C# code into my PowerShell, as I am still learning C# and getting a foothold on learning a new language.

            I am able to open a file locally on my computer and read it line by line. But cannot seem to work out how to open a file from the internet and parse it line by line.

            This works to read the file line by line, and allows me to take action on the line items in the loop.

            ...

            ANSWER

            Answered 2020-Jul-06 at 16:20

            Actually, I found a working solution.

            I was re-reading and testing before posting this question, I came up with a method to solve my own predicament. In the event anyone else is interested, here is the solution:

            Source https://stackoverflow.com/questions/62760272

            QUESTION

            Ruby Heapsort: `sink': undefined method `>' for nil:NilClass
            Asked 2020-Sep-01 at 12:37

            I'm currently working on Robert Sedgewicks Algorithm's book. I'm trying to implement Heap sort but I'm coming across an error

            'sink': undefined method >' for nil:NilClass

            This error happens because of the when the array is pass to the sort method it has 11 elements at 0 index. when it swaps index n (the number of elements in the array) with 1 is comparing nil with a string. Meaning n is 11 but there is no 11 index because the array index starts at 0.

            Here is the Java implementation for the Heap sort method in the book:

            ...

            ANSWER

            Answered 2020-Sep-01 at 12:37

            The error was coming from the following line:

            Source https://stackoverflow.com/questions/63634906

            QUESTION

            parameterized test constructor of junit java error message: Test class should have exactly one public zero-argument constructor
            Asked 2020-Jul-14 at 02:11

            I can really use some help with this parameterized test case I am trying to create. No matter what kind of constructor I create the IDE gives an error message. Here is my code:

            ...

            ANSWER

            Answered 2020-Jul-14 at 02:11

            Here is what the no-arg constructor error means.

            The constructor in the test class is the following:

            Source https://stackoverflow.com/questions/62881330

            QUESTION

            `java myClass` not finding a .class file when `java myClass.java` does? (OpenJDK)
            Asked 2020-Jun-18 at 20:33

            When I'm running java -cp foo.jar MyClass I keep getting the error:

            ...

            ANSWER

            Answered 2020-Jun-18 at 20:33

            Your problem is that when you include the -cp option you are overriding the class path.

            So if your .class file is in the current path you must write:

            Source https://stackoverflow.com/questions/62458602

            QUESTION

            About exercise 1.2.9 on p.115 in "Algorithms 4th Edition" by Robert Sedgewick and Kevin Wayne
            Asked 2020-Jun-06 at 14:09

            I am reading "Algorithms 4th Edition" by Robert Sedgewick and Kevin Wayne.

            The following code is my answer for the exercise 1.2.9 on p.115.

            I expect this code prints the total number of keys examined during all searches but this code doesn't print the value of the counter.

            Why?

            ...

            ANSWER

            Answered 2020-Jun-06 at 13:58

            StdIn will never be empty. It's your keyboard, it can only be waiting for your input. You need to add something to end the loop, such as the user entering some specific key, like q or some other key that won't affect the function of the rest of your program.

            Source https://stackoverflow.com/questions/62232464

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

            Vulnerabilities

            No vulnerabilities reported

            Install algs4

            This repository is intended for use with either the Maven or Gradle build managers. It can be run from either the command line or integrated into Eclipse, NetBeans, and IntelliJ. You can also access it via Bintray.

            Support

            This wishlist.txt contains a list of algorithms and data structures that we would like to add to the repository. Indeed, several of the algorithms and data structures in this repository were contributed by others. If interested, please follow the same style as the code in the repository and thoroughly test your code before contacting us.
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