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hello-algorithm | 「算法面试算法知识」针对小白的算法训练 还包括:1、阿里、字节、滴滴 百篇大厂面经汇总 2、千本开源电子书 3、百张思维导图 (右侧来个 star 吧 ,English version supported) | Learning library

 by   geekxh Java Version: Current License: No License

 by   geekxh Java Version: Current License: No License

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kandi X-RAY | hello-algorithm Summary

hello-algorithm is a Java library typically used in Tutorial, Learning, Example Codes, LeetCode applications. hello-algorithm has no bugs, it has no vulnerabilities and it has medium support. However hello-algorithm build file is not available. You can download it from GitHub.
🌍 针对小白的算法训练 | 包括四部分:①.算法基础 ②.力扣图解 ③.大厂面经 ④.CS_汇总 | 附:1、千本开源电子书 2、百张技术思维导图(项目花了上百小时,希望可以点 star 支持,🌹感谢~)
Support
Support
Quality
Quality
Security
Security
License
License
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kandi-support Support

  • hello-algorithm has a medium active ecosystem.
  • It has 29811 star(s) with 5809 fork(s). There are 656 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 3 open issues and 32 have been closed. On average issues are closed in 12 days. There are 1 open pull requests and 0 closed requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of hello-algorithm is current.
hello-algorithm Support
Best in #Learning
Average in #Learning
hello-algorithm Support
Best in #Learning
Average in #Learning

quality kandi Quality

  • hello-algorithm has no bugs reported.
hello-algorithm Quality
Best in #Learning
Average in #Learning
hello-algorithm Quality
Best in #Learning
Average in #Learning

securitySecurity

  • hello-algorithm has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
hello-algorithm Security
Best in #Learning
Average in #Learning
hello-algorithm Security
Best in #Learning
Average in #Learning

license License

  • hello-algorithm does not have a standard license declared.
  • Check the repository for any license declaration and review the terms closely.
  • Without a license, all rights are reserved, and you cannot use the library in your applications.
hello-algorithm License
Best in #Learning
Average in #Learning
hello-algorithm License
Best in #Learning
Average in #Learning

buildReuse

  • hello-algorithm releases are not available. You will need to build from source code and install.
  • hello-algorithm has no build file. You will be need to create the build yourself to build the component from source.
hello-algorithm Reuse
Best in #Learning
Average in #Learning
hello-algorithm Reuse
Best in #Learning
Average in #Learning
Top functions reviewed by kandi - BETA

kandi has reviewed hello-algorithm and discovered the below as its top functions. This is intended to give you an instant insight into hello-algorithm implemented functionality, and help decide if they suit your requirements.

  • get the entry node of the loop
  • Returns the odd number for a given index
  • return the minimum number in the given array .
  • Searches for a continuous sequence .
  • replace space .
  • Scan integer .
  • Scan integer .

hello-algorithm Key Features

🌍 针对小白的算法训练 | 包括四部分:①.算法基础 ②.力扣图解 ③.大厂面经 ④.CS_汇总 | 附:1、千本开源电子书 2、百张技术思维导图(项目花了上百小时,希望可以点 star 支持,🌹感谢~)

Community Discussions

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QUESTION

How do purely functional languages handle index-based algorithms?

Asked 2022-Apr-05 at 12:51

I have been trying to learn about functional programming, but I still struggle with thinking like a functional programmer. One such hangup is how one would implement index-heavy operations which rely strongly on loops/order-of-execution.

For example, consider the following Java code:

public class Main {
    public static void main(String[] args) {
        List<Integer> nums = Arrays.asList(1,2,3,4,5,6,7,8,9);
        System.out.println("Nums:\t"+ nums);
        System.out.println("Prefix:\t"+prefixList(nums));
    }
  
    private static List<Integer> prefixList(List<Integer> nums){
      List<Integer> prefix = new ArrayList<>(nums);
      for(int i = 1; i < prefix.size(); ++i)
        prefix.set(i, prefix.get(i) + prefix.get(i-1));
      return prefix;
    }
}
/*
System.out: 
Nums:   [1, 2, 3, 4, 5, 6, 7, 8, 9]
Prefix: [1, 3, 6, 10, 15, 21, 28, 36, 45]
*/

Here, in the prefixList function, the nums list is first cloned, but then there is the iterative operation performed on it, where the value on index i relies on index i-1 (i.e. order of execution is required). Then this value is returned.

What would this look like in a functional language (Haskell, Lisp, etc.)? I have been learning about monads and think they may be relevant here, but my understanding is still not great.

ANSWER

Answered 2022-Mar-07 at 21:17

This is not an index-heavy operation, in fact you can do this with a one-liner with scanl1 :: (a -> a -> a) -> [a] -> [a]:

prefixList = scanl1 (+)

indeed, for the list of Nums, we get:

Prelude> prefixList [1 .. 9]
[1,3,6,10,15,21,28,36,45]

scanl1 takes the first item of the original list as initial value for the accumulator, and yields that. Then each time it takes the accumulator and the next item of the given list, and sums these up as new accumulator, and yields the new accumulator value.

Often one does not need indexing, but enumerating over the list is sufficient. Imperative programming languages often work with for loops with indexes, but in many cases these can be replaced by foreach loops that thus do not take the index into account. In Haskell this also often helps to make algorithms more lazy.

If you really need random access lookups, you can work with data structures such as defined in the array and vector packages.

Source https://stackoverflow.com/questions/71387267

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

Vulnerabilities

No vulnerabilities reported

Install hello-algorithm

You can download it from GitHub.
You can use hello-algorithm like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the hello-algorithm component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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