Algorithm-in-JavaScript | Implementing all-time classic algorithmic | Learning library
kandi X-RAY | Algorithm-in-JavaScript Summary
kandi X-RAY | Algorithm-in-JavaScript Summary
My implementations and solutions of classic and popular algorithms and data structures problems. I have put my notes and references for each algorithm and data structure in its own separate README.md file.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Algorithm-in-JavaScript
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Trending Discussions on Algorithm-in-JavaScript
QUESTION
I'm trying to calculate the shortest path in a graph stored in CouchDB. I have to do it 'in db' because my task is to compare query speeds in various situations for 3 different DBMSs. So loading the data and running dijkstra in python (or anything else) is not an option. I'm pretty new to document based databases so I may be wrong but as I see it my only option is a view.
My db structure is the following:
- One document represents one graph.
- In the document with a key 'edges' there is an array of objects with 3 properties: start, end, distance.
- start and end are node IDs but there is no other interesting information about nodes so they are not stored anywhere else.
- distance is a float
My idea was to create a view that returns the shortest path. I have this code for calculating it. It is based on this post. I just had to modify a bit otherwise I got syntax errors for stuff like let,foreach:
...ANSWER
Answered 2019-Jun-04 at 09:13Finally I've found it. When I rewrote the foreach to a traditional for, I forgot to change this:
QUESTION
Note: This is only for personal use and learning, I am not trying to roll my own encryption for public use.
I need to AES256 encrypt a string, however my current attempts end up with a string like Salted__Vέ��|��l��ʼ8XCQlY server side when it is hex decoded. It should rather be a valid utf8 base64 string when hex-decoded, which can then be decoded to the original string. This is similar to the solution offered here, however the salt was not the actual problem (despite the answer being accepted) and I have not been able to suppress the salt op by hex decoding the iv before use (as it suggested). Is there a way to do this?
I've tried several different methods and always end up in a similar spot. My latest attempt is such:
encrypt.js
...ANSWER
Answered 2019-Mar-23 at 11:49You seem to be using CBC mode in JavaScript (default), but CFB in golang. Try with NewCBCDecrypter instead.
QUESTION
I would like to calculate the OTP password generated via Google Authenticator or similar app in C#.
I have found some Javascript implementations and Python but not for C#:
http://blog.tinisles.com/2011/10/google-authenticator-one-time-password-algorithm-in-javascript/
https://stackoverflow.com/a/8549884/3850405
Has anyone done this in C# or should I just try to convert the javascript code to C#?
Useful links:
https://tools.ietf.org/html/rfc6238
https://tools.ietf.org/id/draft-mraihi-totp-timebased-06.html
...ANSWER
Answered 2017-Sep-27 at 08:32Found a good library for it here:
https://github.com/kspearrin/Otp.NET
The code was pretty straight forward:
The Base32Encoding class is from this answer:
https://stackoverflow.com/a/7135008/3850405
Example program:
QUESTION
I need to get my google one-time password every time when I receive a new one.
Please check here also.
I want to use this code inside my app.js (in server side java script file). I have been trying to figure it out but could't make it.
I copied and pasted to all code in that website and created at under same directory and required it.
I tried this:
...ANSWER
Answered 2018-Oct-26 at 11:07Install it from npm repo:
npm install jssha --save or npm install jssha --save-dev
and then require:
jsSHA = require("jssha");
QUESTION
To all string manipulation maestros, this might be an interesting exercise. Given a string containing "x" or "xx" scattered in quasi-random places (like a DNA sequence), I need to permutate this string by varying the "x" in it. Each instance of "x" can be a singular "x" or a double "xx", and the entire string should contain all possible combinations of "x" and "xx".
Given the string "ooxooxoo", the output would be
...ANSWER
Answered 2018-Sep-23 at 07:16I would consider making a simple recursive function that keeps track of where it is as it iterates through the string. Something like:
QUESTION
The goal is to find the sum of all primes up till num. I've seen the same implementation on another post, but it also doesn't work: Sieve of Eratosthenes algorithm in JavaScript running endless for large number
However, the solution there is also incorrect when I try it with 977, it returns 72179, but it should be 73156.
...ANSWER
Answered 2017-Sep-02 at 02:23There's nothing wrong with your code. It returns the sum of primes less than num, and the sum of primes less than 977 is 72179. Your expected answer of 73156 is the sum of primes less than or equal to 977. The difference is 977 because 977 is prime.
QUESTION
I'm trying to implement bresenham algorithm for a line here is what I did:
...ANSWER
Answered 2017-Apr-12 at 09:51You need to take in account margin, border and offset size.
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