All Questions
9,398 questions
0
votes
1
answer
212
views
Listener for property value changes in a Javascript object
The purpose of this code is add proxy on nested object for log changes on property. This is a debug utility!
...
- 22.3k
2
votes
1
answer
151
views
Simple JS Password System
I created a simple password system using HTML, CSS, and JS to quiz myself on my variable, localstorage, and if and else ...
- 35.2k
3
votes
2
answers
99
views
Solving round number in JS by using String
Whatever language you choose, you may encounter a rounding problem. In fact, this is due to the limit of the required number of bits needed to get the right number after a calculation.
Simple example:
...
- 33.7k
0
votes
1
answer
270
views
Smart and Inututive Auto-Format Date Input
I'm developing a custom date input format to enhance user experience in scenarios where birthdays and expiration dates are inputted. Traditional date fields and date picker libraries often fall short ...
- 22.3k
4
votes
0
answers
152
views
Find the longest "common sequence" in two lists
In short, the algorithm must find the longest sequence that joins together common sequences from two lists (a more formal specification is given in the code's header).
The lists are assumed to contain ...
- 28.5k
4
votes
2
answers
127
views
The core of the assembler (the part of the assembler that actually converts mnemonics to opcodes) is hard to follow due to many if-branchings
For my Bachelor thesis, I made a PicoBlaze Assembler and Emulator in JavaScript. I've discussed it on many Internet forums, and quite a few people have complained that the core of my assembler is hard-...
- 3,646
5
votes
1
answer
314
views
Find the starting indices of all occurrences of the pattern in the string - KMP algorithm follow-up
The task
was initially solved here, but was too buggy:
Given a string and a pattern, find the starting indices of all
occurrences of the pattern in the string. For example, given the
string "...
- 33.8k
0
votes
1
answer
79
views
Handling pure in browser HTTP request in Service Worker fetch event
I was suggested by @Bergi on StackOverflow that Async Promise constructors are any pattern.
The argument behind this is that async Promise swallows the errors. In my case, I have try..catch so I'm not ...
- 33.8k
2
votes
2
answers
72
views
French Republican Calendar Converter (Romme Rule)
This is a French Republican Calendar / Gregorian Calendar converter I've written; it returns an accurate date for all the dates I've tested (mostly dates in the present age, although it also lines up ...
- 7,889
1
vote
1
answer
77
views
Javascript CLI to boot iOS simulators, install project, extract data, and merge into JSON
I'm a DIY "dev" - so I really create things that I need or think they'll end up helping others.
I wrote this Swift Package so the iOS community could get device bezel radius' to help with UI ...
- 33.8k
4
votes
2
answers
445
views
Detecting when a user stops typing
I wanted to detect when a user stops typing. I encountered this answer from SO (Not the selected answer, but the second one which seem to be better):
https://stackoverflow.com/a/5926782/17746636
But I ...
- 276
5
votes
1
answer
137
views
Partial Function Application in JavaScript
I'm trying to make a partial function from any function.
Here is a working example:
...
- 33.8k
2
votes
2
answers
493
views
Merge sort implementation using divide-and-conquer
I was told in an interview to write a program for implementing merge sort on the concept of divide-and-conquer.
...
- 3,477
12
votes
2
answers
596
views
Vue - It's the Royal Game of Ur
Background
After learning Kotlin for Advent of Code in December, I started looking into cross-compiling Kotlin for both the JVM and to JavaScript. Then I wrote a game server in Kotlin and also a ...
- 28.5k
2
votes
1
answer
133
views
Form Validation Code Optimization in HTML and JavaScript"
I've been working on a simple form validation code in JavaScript coupled with an HTML form. The form asks for user's basic information, including name, email, country, gender, and skills. There's a ...
CommunityBot
- 1
4
votes
1
answer
157
views
Convert durations to a single unit
In the codebase I inherited, I have this function which converts a number and unit into milliseconds:
...
- 81.8k
5
votes
1
answer
226
views
v-for loop generating list items that will get rearranged based on an associated value (ranking system)
A counter gets incremented by a custom value.
Each increment value gets stored with its refcount that tracks how many times it occurred.
An ordered list shows all increment values entered so far by ...
- 81.8k
5
votes
1
answer
4k
views
Drawing a color wheel... faster?
Using the following code, I am able to neatly draw a color wheel, however, performance is barely acceptable on a high end machine. Now, I know some tricks I could employ to make it run far more ...
2
votes
2
answers
73
views
Calculating the sum of all k-sized sub-arrays in an array using sliding window algorithm
I need to calculate the sum of all k-sized sub-arrays in an array using sliding window algorithm. Is that a valid sliding window algorithm? If not, why?
...
- 33.8k
2
votes
1
answer
106
views
An extended JavaScript plugin for rendering radial pie charts
(This post is the continuation of A JavaScript plugin for rendering radial pie charts.)
(See the continuation of this post.)
Now, you can mark up the radial pie charts via XML:
...
- 29.8k
1
vote
1
answer
66
views
Observer design pattern: value observer and variable observer implementation
Observer implementation that leverages both behaviours observing a variable and observing for a value. Supports subscribing and withdrawing observers.
...
CommunityBot
- 1
2
votes
1
answer
74
views
Reorganice (and style) form's output in HTML using JQuery: how to do it better?
To clarify: The code in "What I achieved" is working. I'm looking for suggestions so I can improve.
I'm quite new with JQuery (and javascript) and I've been learning while styling a forum. ...
- 151
2
votes
1
answer
185
views
Sticky Table Header in Plain JS
I wrote a code for sticky/fixed table header. I am bit confused with my coding, though it does my job. I know there are many jQuery codes available online. But I wanted to do it in plain JS with IE ...
CommunityBot
- 1
1
vote
2
answers
145
views
Receiving a daily reward
I'm doing a daily reward system on my site.
Users can pick up the reward only once a day. The next reward can be picked up the next day, also, only once.
When a user visits the site to pick up a daily ...
- 112k
4
votes
2
answers
1k
views
Object key diff
I've been tasked with finding property differences in massive JSON structures and returning them in a particular fashion (i.e. [key_1.key_2, key_1, etc.]).
Here's ...
- 28.5k
2
votes
2
answers
224
views
Permissions system in MERN app
I am working on a MERN stack app that is a CRM with a couple of modules. Now when the user sends x request to the server to do a supposed action (such as delete something), the server first checks if ...
- 2,367
5
votes
2
answers
233
views
A curry function
I am new to the functional style, and I wrote a curry function to practice this new style. This curry function takes a regular function and returns the curried version of it. Currying is a technique, ...
- 81.8k
2
votes
0
answers
103
views
Lcation of redux "random" state initialization
I'm creating 2048 to practice React/Redux. I've got a game board that appropriately shifts, and follows the game rules (it works).
I'm more concerned with my understanding of handling Redux reducers (...
CommunityBot
- 1
3
votes
1
answer
362
views
I need help optimizing a function that returns all divisors
This is my code:
export function all_divisors(num: number): number[] {
return range(1, num+1).filter(i => num % i === 0).toArray();
}
the ...
- 81.8k
0
votes
2
answers
286
views
Largest prime factor function
I have written a function which finds the largest prime factor of some number. This function works but the problem is that it is too slow. For instance, when I enter 600851475143 as a parameter, the ...
- 81.8k
4
votes
2
answers
15k
views
Find the greatest common divisor of n numbers
Just had this as a practice test problem and I'm curious how to optimize for performance. Thanks!
The greatest common divisor (GCD), also called the highest common factor (HCF) of N numbers is the ...
- 81.8k
11
votes
5
answers
3k
views
A faster way to compute the largest prime factor
I am self-learning js and came across this problem(#3) from the Euler Project
The prime factors of 13195 are 5, 7, 13 and 29.
What is the largest prime factor of the number 600851475143 ?
...
- 81.8k
0
votes
1
answer
130
views
A faster way to compute largest prime factor (Again, but a lot better)
I came up with this code after implementing the feedback given by @200_success. The previous one (A faster way to compute the largest prime factor) tested my patience, but still failed to give the ...
- 81.8k
2
votes
1
answer
255
views
Hackerrank problem -"Another Prime Problem"
I came across this issue in the problem titled: Another Prime Problem. Here's my solution with JavaScript which passed test case-1, but for other test cases it led to timeout.
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- 81.8k
3
votes
4
answers
194
views
Is this an efficient/correct way to get largest Prime factor?
Is this an efficient way to get the largest prime factor of a given number? Other solutions I found involved nested algorithms.
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- 81.8k
1
vote
0
answers
65
views
Euler Project Problem #3 Optimization Needed
Well I was solving Problem 3 from Project Euler, but I just found out that my code is really bad, it would take so much time to finish processing the code and I honestly do not know how to optimize it....
- 81.8k
4
votes
2
answers
190
views
Abundant number implementation
I have implementted a simple JavaScript function to find the list of abundant numbers and print them on the screen.
an abundant number is a number for which the sum of its proper divisors is greater ...
- 81.8k
0
votes
0
answers
319
views
"Sum by factors" algorithm improvement
I was working on a code challenge with the following description:
Given an array of positive or negative integers
I= [i1,..,in]
you have to produce a sorted array ...
- 81.8k
2
votes
1
answer
56
views
Exponentiate common factors with JavaScript
I've created a function that exponentiates common factors.
I'd like to optimize/simplify it because, as you can see, it's very messy and not very performant
...
- 81.8k
2
votes
4
answers
13k
views
Find all factors of an integer
My script finds all factors of an integer. First it finds all prime integers using trial division then it uses the prime factors to find all other factors of the integer.
I would like to know how I ...
- 81.8k
0
votes
1
answer
44
views
js template engine
I am building a template engine for js and I need some help refactoring the code for fast and more efficient performance. If you can help modify or suggest some updates I'll be grateful.
...
- 22.3k
2
votes
0
answers
82
views
Javascript basic search engine recipes
I have made a search engine for recipes. Requirements for this JS Project are as follow:
Create a function called searchRecipes that takes all recipes and an ...
- 28.5k
4
votes
1
answer
52
views
JavaScript search algorithm to find a town in a particular state
I built a function in JavaScript which executes a search algorithm to find a town in a particular state. The dataset, referenced by the variable townsAndStates is ...
- 146
0
votes
1
answer
218
views
Random number generator
Util functions to generate random numbers with upper bound or with both upper and lower bounds:
...
- 5,820
2
votes
0
answers
120
views
Create a Penrose tiling
I programmed this type of Penrose Tilings in javascript and the algorithm is 'simple':
The cyan pentagon always have to draw the yellow losenge and the grey pentagon almost always have to draw two red ...
- 81.8k
5
votes
3
answers
886
views
Idomatic way to ignore `finally` block after cancelling network request [closed]
In React, it is quite common for me to have something similar to the following.
...
- 81.8k
2
votes
1
answer
85
views
Session-based authentication using Express.js
I'm currently learning Express.js and I wrote this authentication code. I'm unsure if what i have is correct, how to improve it and if it's secure. For user and session data storage I'm using ...
- 28.5k
1
vote
1
answer
57
views
Click temporization on user interface elements
Implementation to accommodate different behaviours based on the frequency a user interface element is clicked. It supports number of clicks and number of clicks in a time frame.
...
CommunityBot
- 1
3
votes
1
answer
99
views
JavaScript front-end 'Library App' implementation from the Odin project
I am currently working through the Javascript portion of the Odin Project curriculum and have completed the library app project.
As far as I can see everything is working as expected and I have ...
- 35.2k
0
votes
2
answers
171
views
jQuery + PHP Form Submit and Refresh
Code below successfully processes and submits data to database. Is there anything else that needs to be included / considered?
PHP (note-process.php):
...
- 8,823