hashMap | A concurrent thread-safe hash map implemented in C | Hashing library

by kshk123 C++ Version: Current License: MIT

X-Ray Key Features Code Snippets(2)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | hashMap Summary

hashMap is a C++ library typically used in Security, Hashing applications. hashMap has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

A concurrent thread-safe hash map implemented in C++. Anyone can use the hash-map by simply including the header files in the "inc" folder. Currently, copy and move of the hash is not supported. A main is provided to test the basic scenarios of the hash-map. The hash map is implemented as an array of hash buckets. Each hash bucket is a single linked list of hash nodes and has a mutex associated with it. Multiple threads can read from the same bucket simulatenously, but only one thread can write into the same bucket. Since the mutex is per bucket, if multiple threads try to write into different buckets simulatenously, they will be allowed to do so. This allows some level of concurrency for the hash map. The mutex is implemented as "std::shared_timed_mutex" from C++14 and uses "std::unique_lock" from C++11 for writes and "std::shared_lock" from C++14 for reading from a bucket.

Support

Quality

Security

License

Reuse

Support

hashMap has a low active ecosystem.

It has 79 star(s) with 23 fork(s). There are 11 watchers for this library.

It had no major release in the last 6 months.

There are 2 open issues and 2 have been closed. On average issues are closed in 38 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of hashMap is current.

Quality

hashMap has no bugs reported.

Security

hashMap has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

hashMap is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

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

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hashMap Key Features

No Key Features are available at this moment for hashMap.

hashMap Examples and Code Snippets

Iterate over the contents of an identity HashMap .

java

Lines of Code : 25

License : Permissive (MIT License)

Copy

private static void iterateIdentityHashMap(IdentityHashMap identityHashMap) {
        // Iterating using entrySet
        System.out.println("Iterating values: ");
        Set> entries = identityHashMap.entrySet();
        for (Map.Entry entry: en

Creates a HashMap with simple data

java

Lines of Code : 8

License : Permissive (MIT License)

Copy

public static IdentityHashMap createWithSimpleData() {
        IdentityHashMap identityHashMap = new IdentityHashMap<>();
        identityHashMap.put("title", "Harry Potter and the Goblet of Fire");
        identityHashMap.put("author", "J. K.

Community Discussions

Trending Discussions on hashMap

Overload method with different HashMap parameters

Dynamic Keys with array Values using UseState()

Cannot modify the field in recursive structure

Access separately to each element from a list string

Can't get Java do/while to process correctly

When is angle bracket required in initializing generic type in Java?

Java Types in Kotlin

Getting errors in getting collection for ManyToMany JPA+Hibernate

JAXB/Moxy @XmlPath(".") conflicts with the XMLAdapter during the unmarshalling

How to create a LIST of DOM elements from Map which contains nested/complex objects

QUESTION

Overload method with different HashMap parameters

Asked 2021-Jun-15 at 08:42

I'm making this method with multiple parameters: createExportJob (String testId, Long otherId ) to reduce duplicate code. this example of the method should be the minimum amount of parameters the method should use.

...

ANSWER

Answered 2021-Mar-03 at 14:28

I would do something like this:

Source https://stackoverflow.com/questions/66458175

QUESTION

Dynamic Keys with array Values using UseState()

Asked 2021-Jun-14 at 20:00

I wanna be able to create a hashmap using a javascript object with dynamic keys using useState in react hooks. What I figured so far is that to append a new key value pair, I can just do the following:

...

ANSWER

Answered 2021-Jun-14 at 20:00

Your second version is close. It will work if map[key] is already set

But otherwise map[key] is undefined, and trying to spread [...undefined] will give you the not iterable error

You can first define the currentValues, and if none use an empty array

Source https://stackoverflow.com/questions/67976221

QUESTION

Cannot modify the field in recursive structure

Asked 2021-Jun-14 at 12:14

I have a recursive structure, where field of a structure is a reference to other struct of same type:

...

ANSWER

Answered 2021-Jun-14 at 12:14

You are using a &, but want a &mut, rust references are immutable by default: Playground: https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=be82b8ba01dff60e106af9e59df8228e

Source https://stackoverflow.com/questions/67969945

QUESTION

Access separately to each element from a list string

Asked 2021-Jun-14 at 11:43

I'm trying to access each element from a string object and concatenate it with another string:

Current output: from object -> hrsize

...

ANSWER

Answered 2021-Jun-14 at 11:15

Why don't you simply use a map literal:

Source https://stackoverflow.com/questions/67969027

QUESTION

Can't get Java do/while to process correctly

Asked 2021-Jun-14 at 07:49

I've reviewed several other questions similar to this, but the ones I read didn't help solve my issue. My goal is to print the menu value based on the int user input, and continue offering a selection until the user hits 6 to exit out. Here is my code (I'm new to Java).

...

ANSWER

Answered 2021-Jun-13 at 16:23

As @user15793316 already said, System.in.read() does not read the actual number. You can make use of Scanner instead:

Source https://stackoverflow.com/questions/67960258

QUESTION

When is angle bracket required in initializing generic type in Java?

Asked 2021-Jun-14 at 06:33

All three lines below compiled, are there any differences? If not, is it a good Java practice to always stick to the first one as it has the least amount of code?

...

ANSWER

Answered 2021-Jun-13 at 21:40

It is totally equivalent rows (see diamond):

Source https://stackoverflow.com/questions/67962711

QUESTION

Java Types in Kotlin

Asked 2021-Jun-13 at 23:50

I am working with a Java Lib in Kotlin. One (important) function needs a java.util.HashMap as parameter.

In Java most Types are a part of java.lang.Object. Not so in Kotlin, they are part of Any.

I need to put in the HashMap a String Key and Values from type String and int. Like this:

...

ANSWER

Answered 2021-Jun-13 at 21:36

Any and Object are mapped types. Java code sees every class as a descendent of Object (whether or not it was defined in Kotlin), and Kotlin sees every class as a descendent of Any (whether or not it was defined in Java). When you pass objects from Kotlin to a Java class, they satisfy the Object type requirement.

Kotlin can also refer to the Object type, but it's cleaner not to, or it causes issues like what you ran into. You can use Any to represent the same thing. The Java method that takes it as an argument won't complain. You also don't need to specify java.util.HashMap because the Kotlin HashMap and Java HashMap are the same class. The Kotlin version is just a typealias of the Java HashMap.

Your code above is equivalent to:

Source https://stackoverflow.com/questions/67962745

QUESTION

Getting errors in getting collection for ManyToMany JPA+Hibernate

Asked 2021-Jun-13 at 19:38

I have two classes. A film that keeps authors in it. And the author himself. I want to make the connection ManyToMany for them using EntityManager, where then I can get the data for Set.

Class movie:

...

ANSWER

Answered 2021-Jun-13 at 19:38

I think the Lombok generated hashCode method is causing an infinite loop as Movie references Authors, each of which references the same instance of Movie.

You can probably confirm this by checking bytecode, or just ditch the @Data annotation and manually code equals and hashCode on Entities.

Alternatively you should be able to break the cycle with an @EqualsAndHashCode.Exclude annotation on the movies property of Author - https://projectlombok.org/features/EqualsAndHashCode

Source https://stackoverflow.com/questions/67961316

QUESTION

JAXB/Moxy @XmlPath(".") conflicts with the XMLAdapter during the unmarshalling

Asked 2021-Jun-13 at 17:09

Was unable to find the solution even after trying many things so posting here hoping to get some workaround or fix for this issue.

Basically, if the @XmlPath(".") has been used on a Map and if there is XMLAdapter on it then it fails during the unmarshalling. The marshaling works perfectly only the unmarshalling fails.

In short, I would like to perform the unmarshalling as mentioned here but along with Map I will have one more @XmlElement. So one field is annotated with (Map field) @XmlPath(".") and another String field with @XmlElement and then I would like to perform unmarshalling.

Following is the XML that I am trying to unmarshal:

...

ANSWER

Answered 2021-Jun-13 at 17:09

I was able to get it by using the BeforeMarshal and AfterMarshal methods. Posting here so it can be helpful to someone in the future:

Source https://stackoverflow.com/questions/67860792

QUESTION

How to create a LIST of DOM elements from Map which contains nested/complex objects

Asked 2021-Jun-13 at 17:06

I have a Map field which can contain complex types. The value (Object) can contain Map, String or ArrayList my goal is to write a method that can recursively loop over the Map and create a nested DOM elements and write into List. I was able to complete it halfway through it and after that, I am unable to understand how to proceed in the recursive approach.

Basically, I want my Marshalling method to handle any complex/nested values such as Map and String and create a DOM Element recursively and store it in List.

My input Map can be anything like (can be more nested/complex or simple):

...

ANSWER

Answered 2021-Jun-13 at 17:06

I tried a lot of things and did some research, I was able to get it, posting the answer here as it can be useful to someone in the future:

Source https://stackoverflow.com/questions/67911390

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

Vulnerabilities

No vulnerabilities reported

Install hashMap

You can download it from GitHub.

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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