num | A collection of numeric types and traits for Rust

by rust-num Rust Version: num-0.4.0 License: Apache-2.0

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

kandi X-RAY | num Summary

num is a Rust library. num has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

A collection of numeric types and traits for Rust. This includes new types for big integers, rationals (aka fractions), and complex numbers, new traits for generic programming on numeric properties like Integer, and generic range iterators.

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Quality

Security

License

Reuse

Support

num has a medium active ecosystem.

It has 826 star(s) with 146 fork(s). There are 20 watchers for this library.

It had no major release in the last 6 months.

There are 17 open issues and 176 have been closed. On average issues are closed in 121 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of num is num-0.4.0

Quality

num has 0 bugs and 0 code smells.

Security

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

num code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

num is licensed under the Apache-2.0 License. This license is Permissive.

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

Reuse

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

Installation instructions are not available. Examples and code snippets are available.

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num Key Features

No Key Features are available at this moment for num.

num Examples and Code Snippets

Check if num is prime .

python

Lines of Code : 32

License : Permissive (MIT License)

Copy

def is_prime(num: int) -> bool:
    """
    Returns boolean representing primality of given number num.

    >>> is_prime(2)
    True
    >>> is_prime(3)
    True
    >>> is_prime(27)
    False
    >>> is_prime(

Return the rank of the node at index num .

python

Lines of Code : 28

License : Permissive (MIT License)

Copy

def rank_till_index(node: Node | None, num: int, index: int) -> int:
    """
    Returns the number of occurrences of num in interval [0, index] in the list

    >>> root = build_tree(test_array)
    >>> rank_till_index(root, 6,

Check if num is prime .

python

Lines of Code : 24

License : Permissive (MIT License)

Copy

def is_prime(num: int) -> bool:
    """
    Determines whether the given number is prime or not

    >>> is_prime(2)
    True
    >>> is_prime(15)
    False
    >>> is_prime(29)
    True
    >>> is_prime(0)

Community Discussions

Trending Discussions on num

How do purely functional languages handle index-based algorithms?

Using NativeCall to call the C fn `erf` gets more precise output than `erf` in C

Repeatedly removing the maximum average subarray

How do I correctly use the env variable for data.tables within a function

Why does iteration over an inclusive range generate longer assembly in Rust?

Is there a way to limit the number of seps when doing read.table?

How to map function directly over list of lists?

Merge two files and add computation and sorting the updated data in python

Clang generates strange output when dividing two integers

Summing list of lists in Raku

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:

...

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]:

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

QUESTION

Using NativeCall to call the C fn `erf` gets more precise output than `erf` in C

Asked 2022-Mar-06 at 09:09

I have written a Raku script to call erf function in C standard library:

...

ANSWER

Answered 2022-Feb-04 at 12:56

For the C code, change %f to %.99g to show more digits. This reveals erf(4) returns 0.9999999845827420852373279558378271758556365966796875.

%f requests six digits after the decimal point. The value is rounded to fit that format. %.numberf requests number digits after the decimal point and always used the “fixed” format. %.numberg requests number significant digits and uses a a “general” format that switches to exponential notation when appropriate.

For the Raku code, if you want output of “1.0” or “1.000000”, you will need to apply some formatting request to the output. I do not practice Raku, but a brief search shows Raku has printf-like features you can use, so requesting the %f format with it should duplicate the C output.

Source https://stackoverflow.com/questions/70986616

QUESTION

Repeatedly removing the maximum average subarray

Asked 2022-Feb-28 at 18:19

I have an array of positive integers. For example:

...

ANSWER

Answered 2022-Feb-27 at 22:44

This problem has a fun O(n) solution.

If you draw a graph of cumulative sum vs index, then:

The average value in the subarray between any two indexes is the slope of the line between those points on the graph.

The first highest-average-prefix will end at the point that makes the highest angle from 0. The next highest-average-prefix must then have a smaller average, and it will end at the point that makes the highest angle from the first ending. Continuing to the end of the array, we find that...

These segments of highest average are exactly the segments in the upper convex hull of the cumulative sum graph.

Find these segments using the monotone chain algorithm. Since the points are already sorted, it takes O(n) time.

Source https://stackoverflow.com/questions/71287550

QUESTION

How do I correctly use the env variable for data.tables within a function

Asked 2022-Feb-10 at 17:57

Let us take a simple example

...

ANSWER

Answered 2022-Feb-03 at 21:52

The difference between

Source https://stackoverflow.com/questions/70969830

QUESTION

Why does iteration over an inclusive range generate longer assembly in Rust?

Asked 2022-Jan-15 at 11:19

These two loops are equivalent in C++ and Rust:

...

ANSWER

Answered 2022-Jan-12 at 10:20

Overflow in the iterator state.

The C++ version will loop forever when given a large enough input:

Source https://stackoverflow.com/questions/70672533

QUESTION

Is there a way to limit the number of seps when doing read.table?

Asked 2022-Jan-04 at 22:01

I have a piece of text data that I want to preprocess, and this data is in the form of:

...

ANSWER

Answered 2022-Jan-04 at 09:33

You probably have something like this.

Source https://stackoverflow.com/questions/70576051

QUESTION

How to map function directly over list of lists?

Asked 2021-Dec-26 at 15:38

I have built a pixel classifier for images, and for each pixel in the image, I want to define to which pre-defined color cluster it belongs. It works, but at some 5 minutes per image, I think I am doing something unpythonic that can for sure be optimized.

How can we map the function directly over the list of lists?

...

ANSWER

Answered 2021-Jul-23 at 07:41

Just quick speedups:

You can omit math.sqrt()
Create dictionary of colors instead of a list (that way you don't have to search for the index each iteration)
use min() instead of sorted()

Source https://stackoverflow.com/questions/68495481

QUESTION

Merge two files and add computation and sorting the updated data in python

Asked 2021-Dec-16 at 15:02

I need help to make the snippet below. I need to merge two files and performs computation on matched lines

I have oldFile.txt which contains old data and newFile.txt with an updated sets of data.

I need to to update the oldFile.txt based on the data in the newFile.txt and compute the changes in percentage. Any idea will be very helpful. Thanks in advance

...

ANSWER

Answered 2021-Dec-10 at 13:31

Here is a sample code to output what you need. I use the formula below to calculate pct change. percentage_change = 100*(new-old)/old

If old is 0 it is changed to 1 to avoid division by zero error.

Source https://stackoverflow.com/questions/70267576

QUESTION

Clang generates strange output when dividing two integers

Asked 2021-Dec-07 at 09:57

I have written the following very simple code which I am experimenting with in godbolt's compiler explorer:

...

ANSWER

Answered 2021-Dec-07 at 09:52

The assembly seems to be checking if either num or den is larger than 2**32 by shifting right by 32 bits and then checking whether the resulting number is 0. Depending on the decision, a 64-bit division (div rsi) or 32-bit division (div esi) is performed.

Presumably this code is generated because the compiler writer thinks the additional checks and potential branch outweigh the costs of doing an unnecessary 64-bit division.

Source https://stackoverflow.com/questions/70257914

QUESTION

Summing list of lists in Raku

Asked 2021-Dec-01 at 14:05

I am trying to sum a list of lists in Raku. Example taken from here:

...

ANSWER

Answered 2021-Dec-01 at 14:05

To answer your first question: yes, it's precision, as you're forcing it to using floating point arithmetic, and the 1 is drowned out.

Source https://stackoverflow.com/questions/70185263

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

Vulnerabilities

No vulnerabilities reported

Install num

You can download it from GitHub.
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.

Support

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

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