radix | Radix is a full-featured Redis client for Go
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kandi X-RAY | radix Summary
(v4, still in beta). Radix is a full-featured Redis client for Go. See the reference links above for documentation and general usage examples.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of radix
radix Key Features
radix Examples and Code Snippets
function radixSort(array, radixBase = 10) {
if (array.length < 2) {
return array;
}
const minValue = findMinValue(array);
const maxValue = findMaxValue(array);
// Perform counting sort for each significant digit, starting at 1
let
Community Discussions
Trending Discussions on radix
QUESTION
I am working on an implementation of Radix sort for arrays of integral types. Using the numeric_limits
functions provided by the standard library, I am able to learn about the native base representation of any given integral type using numeric_limits::radix
, and the maximum amount of digits in that base that the type can hold using numeric_limits::digits
. In order to implement radix sort optimally, I need to extract the value of each of those digits in turn for each of the elements of the array. Is there some standard, or at least common, way to do this? In case it matters, I am using C++20 and do not care about backwards compatibility with older revisions of the standard, only maximum interoperability with other C++20 code.
ANSWER
Answered 2022-Mar-28 at 20:32If you are only working with integer type that uses radix 2, you can use bitset
to extract each digit:
QUESTION
The following simple code converts an Integer value to a string value and logs it.
...ANSWER
Answered 2022-Mar-25 at 14:48The idea of the radix
function is that you give it a number and it creates a Radix
from it. But not every number constitutes a valid Radix
. For example, if you give it -5
, it shouldn't work. And neither should 0
or 1
for example. For some technical reasons, radices above 32 are also deemed invalid.
So that's why it returns Maybe
: it would be Nothing
in case the number you gave it wasn't a "valid" radix.
And the use case for that function is when you don't actually know the number ahead of time. Like if you get it from the user. Or from some sort of config file or whatnot. In that case, if you get a Nothing
, you would interpret that as "invalid user input" or "corrupted config file" and report an error accordingly. And you won't even get as far as calling toStringAs
. This is one of the big selling points of static types: applied properly, they can force you to write a correct, reliable program, without ignoring edge cases.
However, in case you already know that you're interested in decimal radix, just use decimal
. It's a Maybe
-free constant provided by the library, along with some other frequently used ones, such as binary
and octal
.
QUESTION
I am using the GPU radix sort algorithm of the CUB library to sort N 32-bit unsigned integers whose values all utilize only k of their 32 bits, starting from the least significant bit.
Thus, I specify the bit subrange [begin_bit, end_bit) when calling cub::DeviceRadixSort::SortKeys in hopes of improving the sorting performance. I am using the latest release of CUB (1.16.0).
However, SortKeys crashes (not deterministically, but almost always) and reports an illegal memory access error when trying to sort 1 billion keys with certain specified bit ranges of [begin_bit=0, end_bit=k), and k = {20,19,18}, e.g. ./cub_sort_test 1000000000 0 20
I tested this on a Volta and an Ampere NVIDIA GPU with CUDA versions 11.4 and 11.2 respectively. Has anyone encountered this previously, and/or know a fix? Here is the minimal, reproducable example code:
...ANSWER
Answered 2022-Feb-27 at 15:17The problem with your code is that you do not use SortKeys
correctly. SortKeys
does not work in-place. You need to provide a separate output buffer for the sorted data.
QUESTION
I am trying to sign a message in go
generated via hd wallet's private key using cosmos sdk. Below is the equivalent implementation in python which generates the signed message / signature as expected when submitted/verified is working properly but unable to get it working wtih Go
implementation. Any inputs for equivalent golang version of the python implementation is much appreciated. Thank you.
Python version uses sha256 , ecdsa but when using the equivalent cyrpto/ecdsa doesn't return valid signature.
...Python
ANSWER
Answered 2022-Feb-20 at 14:48Both codes return hex encoded as private key
QUESTION
I've come to learn that there are linear time sorting algorithms that don't run by comparisons like radix sort. My hope is to have a sorting algorithm that runs in linear time but can also run in constant time by running n threads for n elements. From the research I've done, this seems possible on a PRAM CRCW machine but I've found conflicting information as to whether the algorithm that runs on a PRAM CRCW machine can be run on a standard consumer computer in the same constant time.
FYI, the algorithm in question is here. This is pretty interesting as well.
Is it possible?
...ANSWER
Answered 2022-Feb-14 at 19:25Q : "Is it possible ( to implement PRAM CRCW on consumer processor ) ?"
A :
Let's clarify the facts first. We can agree on what "consumer"-processors are - the most often a COTS term is right this - a Custom-Over-The-Shelf processor, as anyone can go and buy. So is the set of properties of any such COTS hardware, being pre-defined by the silicon structures pre-fabricated "inside" such processor.
On the contrary, the CRCW PRAM term is knowingly & intentionally a highly abstract, ultimately idealised property of any such processor architecture, that can (without having any limits in time or other compromises) Concurrently Read (under any and all levels of parallelism) and also Concurrently Write (under any and all levels of parallelism) from/into any memory location ("address") all at once, adding some additional créme-a-la-créme property, like to performe a sum of all CW-s, before actually storing a such resulting value. Any such physical implementation of these abstract properties, that meets them all under any circumstances, having no exceptions to doing so in full parallel-mode, can be called a CRCW PRAM and never otherwise.
This said, the CRCW PRAM architecture is by far not met, not even being anywhere close to it, in any of the current COTS processor hardware silicon.
Such question is leading, by definition, to actually unachievable wish to have an architecture-A get "implemented" by using an architecture-B (which can never be turned into meeting an architecture-A, even if composing many such COTS processors (as defined) into some interconnected macro-structure, which may turn some of the COTS hardware properties a bit "closer" to the CRCW PRAM, yet at such devastatingly adverse costs or slowness of operations, that such attempts can result but in something ultra-expensive + ultra-power-inefficient + ultra-slow ( being about N2 ~ 3 sub-sampled and having a need to artificially "wait" for all the slowest parts for a full-width of the parallelism to get physically completed, if viewed from the macro-structure point of view).
Using any amount of superscalar, M-way pipelined, out of order executing CISC silicon for achieving a macro-structure topological trick just for simulating a "slowed down" CRCW PRAM is IMHO technically not a right way to go ( if we want to enjoy a reasonably practical O( k )-sorting machine ).
If using a current level of QPU processors, we may "somehow" enjoy a constant time QUBO (a single hardware-instruction quantum processor in the current line of the D-WAVE systems' machines ), I would hesitate to consider this corner-case (topologically setup to bear "inital" state and letting The Nature ( the laws of physics ) to "execute" a quantum-annealing "algorithm" to result in a statistical-distribution of results, answering the problem solution in constant time ) a COTS, which it is not, is it?
QUESTION
I have tried looking for this problem here but still can't find an answer (maybe I'm too newbie to even write the exact keywords). I am trying to overcome freecodecamp challenge on "binary agent", my question is not "How to convert binary to text string" But
why is there a double quote at the beginning of the my result ?
Thank You
...ANSWER
Answered 2022-Jan-26 at 02:28All Javascript strings will have double quotes at the beginning when printed. Hence, the problem isn't that there is a double quote printed at the start of your console log output. Rather, the issue is that there isn't a double quote printed at the end of your logged string. In fact, the end double quote is indeed printed at the end of your logged string, but is prefixed by a long string of undefined characters, which might explain why you might have missed it:
The underlying issue is because you are iterating through the individual characters of the string in
QUESTION
I am trying to write a program that will create a link to the API. To do this, I use bs4
, with which I search for the div I need, but I get an error due to the program not working correctly. I want to find only this coin name
that are in the coin list
. How I can fix it? Please, give me a hand.
My code:
...ANSWER
Answered 2022-Jan-02 at 00:11There are two issues with your code:
- This:
if check_name == coins_list:
will always return false, sincecheck_name
is a string andcoins_list
is a list. You wantif check_name in coins_list:
. baseurl
isn't defined in the code snippet. Change it tourl
.
Perform both these changes, and you should have a nonempty output in your text file. The URLs in this file appear to be well-formed.
QUESTION
Getting the following error from following code. What I am trying to achieve is printing a series of hex code to a file as bytes itself. How do I fix it, So that I can print 8C in the file
...ANSWER
Answered 2021-Dec-29 at 12:43Byte.parseByte(str, 16)
expects signed input. You can write Byte.parseByte("-1", 16)
, for example, because -1
fits into Java byte
type, but not Byte.parseByte("80", 16)
, because 128
does not fit into Java byte
type.
You can replace Byte.parseByte(str.substring(index, index + 2), 16)
with (byte) Integer.parseInt(str.substring(index, index + 2), 16)
and it'll work fine.
If you're using Java 17, you can use java.util.HexFormat.of().parseHex(hexString)
instead of getByte(hexString)
.
QUESTION
I am trying to override the 'toString' function in Number object. This means that if I do:
...ANSWER
Answered 2021-Dec-29 at 19:13this
in the arrow function is not the number. Use a function
expression and put the original Number.prototype.toString
in a variable and use that.
QUESTION
I am new to Python and struggling to understand the different ways to install packages. I am on MacOS Catalina.
I tried installing the Python package CytoPy (https://github.com/burtonrj/CytoPy) in the terminal:
...ANSWER
Answered 2021-Dec-20 at 20:18Your env is python3 and pip on mac is python2. I think. Try and use pip3 for the install or run your env in python2. Might be using different python verions.
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