arr | highly performant Array.prototype alternatives | Functional Programming library

by lukeed JavaScript Version: v1.0.3 License: MIT

X-Ray Key Features Code Snippets(3)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | arr Summary

arr is a JavaScript library typically used in Programming Style, Functional Programming, Nodejs applications. arr has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can install using 'npm i @arr/unique' or download it from GitHub, npm.

A collection of tiny, highly performant Array.prototype alternatives and extra utilities.

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Quality

Security

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Support

arr has a low active ecosystem.

It has 242 star(s) with 10 fork(s). There are 3 watchers for this library.

It had no major release in the last 12 months.

There are 2 open issues and 6 have been closed. On average issues are closed in 2 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of arr is v1.0.3

Quality

arr has 0 bugs and 0 code smells.

Security

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

arr code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

arr 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

arr releases are available to install and integrate.

Deployable package is available in npm.

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arr Key Features

No Key Features are available at this moment for arr.

arr Examples and Code Snippets

Find the occurrence of a value in arr .

python

Lines of Code : 70

License : Permissive (MIT License)

Copy

def fibonacci_search(arr: list, val: int) -> int:
    """A pure Python implementation of a fibonacci search algorithm.

    Parameters
    ----------
    arr
        List of sorted elements.
    val
        Element to search in list.

    Returns

Get the subset of arr

java

Lines of Code : 35

License : Permissive (MIT License)

Copy

public static int subSet(int[] arr) {
        int n = arr.length;
        int sum = getSum(arr);
        boolean[][] dp = new boolean[n + 1][sum + 1];
        for (int i = 0; i <= n; i++) {
            dp[i][0] = true;
        }
        for (int j

Finds the kadanes in arr .

python

Lines of Code : 31

License : Permissive (MIT License)

Copy

def kadanes(arr: list) -> int:
    """
    If negative_exist() returns 0 than this function will execute
    else it will return the value return by negative_exist function

    For example: arr = [2, 3, -9, 8, -2]
        Initially we set value o

Community Discussions

Trending Discussions on arr

filtering multiple arrays ngrx

Recursion with lists vs Recursion with strings in Python

Implement barrier with pthreads on C

List comprehension to get a 2D list of the same values

@types - array of values to object keys

How to pass multiple inputs into a single query?

Split Function - divide cell by string

Filter a js array of object based on 2 conditions

numpy follow a self-indexing list without loops

error segmentation fault in dynamic array

QUESTION

filtering multiple arrays ngrx

Asked 2021-Jun-15 at 19:53

I have a store setup that has multiple arrays

I'm trying to search all arrays at once, via a textfield.

I can get this done, by calling a selector function on keyup, that filters the 4 arrays and pushes to a new array.

I've thought about merging all the arrays to one array before filtering, but I want to keep the results separate, as they are going to be displayed in categories.

Just trying to see if I can streamline the performance at all and if there's a more concise way of doing this, in case I need to do something similar with larger arrays.

my textField function:

...

ANSWER

Answered 2021-Jun-15 at 19:16

This should implement the selector function with less code and make it more adaptable to kinds of data, if needed you can specify a more precise type in the filter function.

Source https://stackoverflow.com/questions/67991722

QUESTION

Recursion with lists vs Recursion with strings in Python

Asked 2021-Jun-15 at 19:20

When I use the following code to print all subsets of the string "abc", the code works as expected, printing : ab a b

...

ANSWER

Answered 2021-Jun-15 at 19:20

array.append() is a function that returns a None value. So in the first recursive call, you pass a None value instead of the appended array as you'd want. Here's a solution:

Source https://stackoverflow.com/questions/67992210

QUESTION

Implement barrier with pthreads on C

Asked 2021-Jun-15 at 18:32

I'm trying to parallelize a merge-sort algorithm. What I'm doing is dividing the input array for each thread, then merging the threads results. The way I'm trying to merge the results is something like this:

...

ANSWER

Answered 2021-Jun-15 at 01:58

I'm trying to parallelize a merge-sort algorithm. What I'm doing is dividing the input array for each thread, then merging the threads results.

Ok, but yours is an unnecessarily difficult approach. At each step of the merge process, you want half of your threads to wait for the other half to finish, and the most natural way for one thread to wait for another to finish is to use pthread_join(). If you wanted all of your threads to continue with more work after synchronizing then that would be different, but in this case, those that are not responsible for any more merges have nothing at all left to do.

This is what I've tried:

Source https://stackoverflow.com/questions/67977544

QUESTION

List comprehension to get a 2D list of the same values

Asked 2021-Jun-15 at 18:09

I have the following digits:

...

ANSWER

Answered 2021-Jun-15 at 18:03

You can create temporary dictionary to group the digits:

Source https://stackoverflow.com/questions/67991351

QUESTION

@types - array of values to object keys

Asked 2021-Jun-15 at 16:52

Let's say I have a list of strings

...

ANSWER

Answered 2021-Jun-15 at 16:52

You can make use of the as const TypeScript syntax (See doc).

Source https://stackoverflow.com/questions/67989669

QUESTION

How to pass multiple inputs into a single query?

Asked 2021-Jun-15 at 15:01

In my app I want the user to mention how many columns he wants for the table and then enter the data for those columns and create a table with those values. Here is what I have:

...

ANSWER

Answered 2021-Jun-15 at 15:01

You can name your input-fields as an array like: And get it with var_dump($_POST['col_name']);

In your example you could do like this:

Source https://stackoverflow.com/questions/67988425

QUESTION

Split Function - divide cell by string

Asked 2021-Jun-15 at 15:00

I am trying to divide merged information from one cell into separate cells.

one cell:

amount:2 price:253,18 price2:59,24 EU status:WBB NAS MRR OWA PXA min:1 opt:3 category: PNE code z:195750

divided data: (I want to export each part into another cell)

amount:2 price:253,18 price2:59,24 EU status:WBB NAS MRR OWA PXA min:1 opt:3 category: PNE code z:195750

I can't simply divide by finding empty space, status cell which is case-sensitive | status:WBB NAS MRR OWA PXA| has a different data range with spaces that can't be divided.

Split ( expression [,delimiter] [,limit] [,compare] )

...

ANSWER

Answered 2021-May-24 at 11:44

As the order is the same one way is to simply search for adjacent key names & parse out whats in-between:

Source https://stackoverflow.com/questions/67670930

QUESTION

Filter a js array of object based on 2 conditions

Asked 2021-Jun-15 at 13:17

I have an array of objects. I want to keep the objects with ID: 0 but remove the duplicates from the array where id > 0.

...

ANSWER

Answered 2021-Jun-15 at 13:15

You can use the filter and Set to achieve the desired result.

It is the efficient solution because it takes only one iteration of arr to get the desired result and takes constant time to add and has to add and check if the id exist.

Source https://stackoverflow.com/questions/67986808

QUESTION

numpy follow a self-indexing list without loops

Asked 2021-Jun-15 at 12:46

I have a list [A,B,C,D,E] and a list of indexes [3,2,0,4,1] but the indexes actually points to itself, giving the order to follow.

So starting at 0, next index is 3, then at index 3, the next index is 4,1,2,0 etc.

I can achieve this by looping and updating the index, but my list may have thousands of points, Is there a way to avoid loops and vectorize this?

my code:

...

ANSWER

Answered 2021-Jun-15 at 12:46

What you're trying to do looks to me like a depth first search in the graph where each node is a number from 0 to n-1 (n = 5 in your example) with a single outgoing edge to the next index it points to. The python solution is already pretty efficient, but if you want something pre-made I think scipy has the solution:

Source https://stackoverflow.com/questions/67981717

QUESTION

error segmentation fault in dynamic array

Asked 2021-Jun-15 at 11:51

I am solving this problem on dynamic array in which input first line contains two space-separated integers,n, the size of arr to create, and q, the number of queries, respectively. Each of the q subsequent lines contains a query string,queries[i]. it expects to return int[]: the results of each type 2 query in the order they are presented.

i tried to attempt as below and my code seems fine to me but it gives segmentation fault error. please help me where I am getting conceptually wrong. thanks.

problem: Declare a 2-dimensional array,arr , of n empty arrays. All arrays are zero indexed. Declare an integer,last answer , and initialize it to zero.

There are 2 types of queries, given as an array of strings for you to parse:

Query: 1 x y

Let idx=((queries[i][1]^last_answer)%n);. Append the integer y to arr[idx].

Query: 2 x y

Let idx=((queries[i][1]^last_answer)%n);. Assign last_answer=arr[idx][queries[i][2]%(arr[idx].size())] . Store the new value of last_answer to an answers array.

input: 2 5

1 0 5

1 1 7

1 0 3

2 1 0

2 1 1

output:

...

ANSWER

Answered 2021-Jun-15 at 11:25

You are accessing elements of vector without allocating them.

resize() is useful to allocate elements.

Source https://stackoverflow.com/questions/67985309

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

Vulnerabilities

No vulnerabilities reported

Install arr

You can install using 'npm i @arr/unique' or download it from GitHub, npm.

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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