hash_map | Nicer way to map your hashes | Map library

by arturictus Ruby Version: Current License: MIT

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

kandi X-RAY | hash_map Summary

hash_map is a Ruby library typically used in Geo, Map applications. hash_map has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Nicer way to map your hashes

Support

Quality

Security

License

Reuse

Support

hash_map has a low active ecosystem.

It has 9 star(s) with 4 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

There are 8 open issues and 11 have been closed. On average issues are closed in 131 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of hash_map is current.

Quality

hash_map has no bugs reported.

Security

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

License

hash_map 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

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

Installation instructions, examples and code snippets are available.

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hash_map Key Features

No Key Features are available at this moment for hash_map.

hash_map Examples and Code Snippets

No Code Snippets are available at this moment for hash_map.

Community Discussions

Trending Discussions on hash_map

Is it possible to return a `Keys<'_, K, V>` iterator as an more generic iterator of `&K`?

std::unordered_map find() operation not working in GCC7

How can I assign to an uninitialised vector without dropping the previous value?

After Reading the data using HashMap how to check if the credentials are of that particular user?

BPF hashmap not showing correct value when retrieving

glog doesn't compile on Windows with MinGW

Expected struct std:vec:Vec found struct std:collections:hash_map:Keys

Convert HashMap values into BinaryHeap

VSCode, Intellisense C++ Autocomplete not working, ubuntu 20.04

Find the length of largest subarray with 0 sum

QUESTION

Is it possible to return a `Keys<'_, K, V>` iterator as an more generic iterator of `&K`?

Asked 2021-May-28 at 19:32

I would to write a method that returns self.hash_map.keys() while hiding from the caller the concrete type Keys<'_, K, V>.

A downside of the Keys return type is that it exposes to the caller that the K elements are coming from a HashMap. Intuitively, it seems as though it shouldn't be necessary to expose this information.

What is the cheapest way (with respect to CPU/allocations) to return an iterator of key references?
Can it be accomplished by some precise choice of return type? Is some form of type-erasure possible?
Or does it require an invocation in the function body? Is some transformation necessary?

...

ANSWER

Answered 2021-May-28 at 19:25

Can it be accomplished by some precise choice of return type? Is some form of type-erasure possible?

Yes! You can return an impl Trait to indicate that you're returning a type that implements Trait but doesn't expose the concrete type:

Source https://stackoverflow.com/questions/67743635

QUESTION

std::unordered_map find() operation not working in GCC7

Asked 2021-May-26 at 21:42

I am working on porting my c++ application from GCC4.7 to GCC7 and ran into an issue where std::hash_map find() function returns null result for keys which are present in map.

Existing code:

...

ANSWER

Answered 2021-May-26 at 21:42

You've discovered that std::hash hashes the actual pointer - not the C string it points at. Sometimes "def" and the second "def" will actually have the same pointer value. It depends on how the compiler optimized it.

To use C strings, you need to provide a hash functor for C strings. Here's one example:

Source https://stackoverflow.com/questions/67709794

QUESTION

How can I assign to an uninitialised vector without dropping the previous value?

Asked 2021-May-20 at 21:17

I have a situation where I know how to initialise a vector, but I don't know the exact order of those elements.

...

ANSWER

Answered 2021-May-20 at 21:17

You can use pointer::write or ptr::write:

Source https://stackoverflow.com/questions/67625026

QUESTION

After Reading the data using HashMap how to check if the credentials are of that particular user?

Asked 2021-Jan-20 at 14:33

So I am trying to create a login in which data is in a file and the data has been read through hash map. So how can check if it the email and password of that particular user and give access?

...

ANSWER

Answered 2021-Jan-17 at 19:57

After the read.close(), you can check if the hashmap value for the email key matches the password:

Source https://stackoverflow.com/questions/65763955

QUESTION

BPF hashmap not showing correct value when retrieving

Asked 2021-Jan-18 at 00:42

I'm trying to create a hashmap in BPF in kernel code, as follows:

...

ANSWER

Answered 2021-Jan-18 at 00:40

The lookup function returns a pointer to your value:

Source https://stackoverflow.com/questions/65766915

QUESTION

glog doesn't compile on Windows with MinGW

Asked 2021-Jan-11 at 17:55

It seems that glog doesn't compile on Windows with MinGW. Cmake configuration and generation is OK, but when I start the mingw32-make.exe -j10 command, I get a lot of errors related with ambiguity declarations.

This is the complete cmake configure and generate command output:

...

ANSWER

Answered 2021-Jan-11 at 17:55

I managed to compile glog on Windows with MinGW using these steps:

in my ceres folder (in my case "D:\INSTALL\Development\lib\ceres-mingw") I typed:

Source https://stackoverflow.com/questions/65635138

QUESTION

Expected struct std:vec:Vec found struct std:collections:hash_map:Keys

Asked 2020-Nov-10 at 18:08

I have the following school object

...

ANSWER

Answered 2020-Nov-10 at 18:08

Keys is an iterator over the keys of a HashMap. If you want to store it in a struct, first collect it into a Vec:

Source https://stackoverflow.com/questions/64773779

QUESTION

Convert HashMap values into BinaryHeap

Asked 2020-Oct-08 at 15:52

I am talking about std::collections::hash_map::Values struct, which you get from calling .values() method on aHashMap. This struct really confuses me, how can I access its values without iterating over them? I want to turn those values into a BinaryHeap like so:

...

ANSWER

Answered 2020-Oct-08 at 15:52

The Values struct is defined as

An iterator over the values of a HashMap.

However, there is an easy way to convert the values into a BinaryHeap. Since it implements FromIterator, you can do

Source https://stackoverflow.com/questions/64261393

QUESTION

VSCode, Intellisense C++ Autocomplete not working, ubuntu 20.04

Asked 2020-Sep-18 at 02:50

I have installed Vscode under ubuntu 20.04. I cannot code without having intellisense autocomplete. But it is not working. I have used autocomplete in previous ubuntu LTS(16.04 , 18.04) with no problem.

I have configured c_cpp_properties.json.

...

ANSWER

Answered 2020-Sep-18 at 02:50

Turns out that some problem related to VSCode itself. I checked for the new updates on help -> Check for Updates , after a new update things get back to normal. The current version that works is ;

Source https://stackoverflow.com/questions/63897646

QUESTION

Find the length of largest subarray with 0 sum

Asked 2020-Aug-01 at 11:23

Given an array of integers, find the length of the longest sub-array with sum equals to 0.

...

ANSWER

Answered 2020-Aug-01 at 11:23

To spell out the solution from the comment. First create a generator to yield all sub-arrays:

Source https://stackoverflow.com/questions/63204202

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

Vulnerabilities

No vulnerabilities reported

Install hash_map

Add this line to your application's Gemfile:.

Support

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/hash_map. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

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