Questions tagged [javascript]
JavaScript is primarily a language focused on web development. Being a monopoly on the front end and having Node on the back end. Use this tag for questions regarding vanilla JavaScript; optionally tagged with an ECMAScript version. If you are using a preprocessor such as TypeScript please tag with that too.
9,249
questions
0
votes
0answers
10 views
Calculate minimum buy/sell amount that exchange will allow the order to be placed based on current price
I have created calculateMinimumAmount to calculate the minimum buy/sell amount that exchange will allow the spot order to be placed based on the current price.
The ...
0
votes
0answers
12 views
The students reward list
The code needs to make the list of the students. Correct the names if it's needed and add a new students. And the teacher can give them the stars like the reward. I did it, but my code looks like a ...
-1
votes
0answers
8 views
how can i make the bot resend a message every time i restarting the project [closed]
when i do process.exit()
and i start the discord bot project again
will send a selected message in the selected channel
and delete the old message witch created before i exit from the project
with ...
3
votes
2answers
44 views
-1
votes
1answer
33 views
concise alternative to a while loop
The following code works fine to generate an array of 6 random values (or however many are specified by iterations). I'm wondering if there's a more concise way ...
-1
votes
1answer
15 views
How do I distinguish the difference in naming and file structure between components and mobile components in React? [closed]
Here is my example structure:
.
├── App.jsx
├── index.js
└── src
└── components
├── Button.jsx
└── Header
└── Header.jsx
Question:
...
3
votes
1answer
147 views
Sanitation and validation of a user input 10 digits phone number
phoneNumberCheck() is using 2 helper function to check if a users input of a phone number is valid.
this is a client side check, if this code is ok should I check the same at the nodeJS back end?
is ...
1
vote
3answers
89 views
Run-length coder
I have below code, which counts only adjacent letters in string and gives out count.
...
0
votes
1answer
39 views
React useState,useEffect - save variables to local storage
I'm new in React and state hooks.I'm trying to make a website about creating booklist and save it to local storage. Also uploading image to cloudinary. My problem is ; when i trying to save cloudinary ...
2
votes
2answers
66 views
Keeping only every nth element in an array in JavaScript
I have two arrays, arr_of_frequencies and float_array, of the same length — around 500-800k values each. I have to get that down ...
4
votes
2answers
67 views
File naming (two files cannot have equal names)
This is a challenge I completed at CodeSignal.
You are given an array of desired filenames in the order of their creation. Since two files cannot have equal names, the one which comes later will have ...
0
votes
0answers
22 views
SPEED TYPING TEST [closed]
The question is that I have to create a speed typing test as shown in the link below
goal
I have to meet all these points:
Add HTML container element with id speedTypingTest
Add HTML paragraph ...
3
votes
2answers
47 views
Show/hide for multiple IDs
I'm don't know much about javascript, but and slowly learning through using other people's code. The below code I'm using is quite repetitive, with the only variance being the ID names. I feel like ...
1
vote
0answers
23 views
More Efficent Code for Announcment Command in Discord.js
I am creating a command in my discord bot to send an announcement to every server it is in, and this is the only way i could think of doing it, but i know there is a more efficient way of doing it.
...
1
vote
1answer
46 views
Can this code be improved regarding map with in a For loop
I am looking for best performance regarding this code point is I don't have a clear idea weather a map integrated in a for loop is a good idea, the problem is the array is a nested object coming from ...
4
votes
1answer
56 views
Add result-logging to any function
I'm writing a simple function to transform functions by logging the result before returning it.
The function as written by me:
...
6
votes
1answer
59 views
Improving product configurator “algoritm”
I have created a product configurator in VueJS and the whole functionality of it runs on one single function. I've put the word algoritm in the title in quotes because I don't really know if it is ...
3
votes
2answers
47 views
Limit second <select> options based on the first <select>
I'm wanting to see if there's a better way to write this, solely in Javascript.
There are two kinds of sets, the first set (C7, T7, C11, T11) have four options in the first select, and then up to two ...
0
votes
0answers
23 views
Draw shapes using the Html5 Canvas api
A while ago I decided to start working on a project that will keep me busy for a while and will help me sharpen my programming skills.
I do not underestimate the work behind apps like adobe xd, sketch....
1
vote
2answers
63 views
Each item of the array must loop and show message for some time (duration) and repeat msg each value of delay
Is there a better way to loop item of an array using forEach and make repeat it using setTimout/...
1
vote
0answers
22 views
Typescript type checking of hierarchical types
I want to create a hierarchy of Typescript interfaces because I think classes would be an overkill in my case. The main obstacle is checking if an object has a specific type. I solved it this way:
<...
0
votes
0answers
15 views
Is there a better way to copy dynamic data from one sheet to another in google sheets script?
I'm pulling data in from an API and putting it in the top two rows of a sheet. This script is to copy the data from the "pull" sheet into a daily sheet. The rub is that the data may change ...
10
votes
4answers
1k views
Restructuring JSON to create a new JSON where properties are grouped according to similar values
I have a JSON structure in the following example format:
...
2
votes
0answers
30 views
Javascript client storage with the same persistence as a session cookie
I want to implement a client storage mechanism that is as persistent as a session cookie but with more storage capacity.
I am doing this by encrypting the data before storing it and saving the keys in ...
4
votes
1answer
65 views
JavaScript Binary Search — first try
EDIT: code snippet added, check the output in JS console
I wrote the following binary search algorithm in JS, for the first time in my experience. The variable ...
2
votes
0answers
50 views
What to add to a Flappy Bird JavaScript code
I have a 200 line fully functional flappy bird code but I was told it's suppose to be 250 lines. I don't know what more I can add to the js of the game to improve it and make it longer. I was told I ...
2
votes
1answer
40 views
Is there a better approach to group the props and get the count of an object of arrays in javascript, less code but native approach
Could anyone help me with below logic implementation. I am new to Javascript and have been practicing advanced functions. The below code does the job but is there a better way to achieve the same? I ...
0
votes
1answer
35 views
A custom RxJS operator which emits (and completes) once a condition has been satisfied for all previous values of the source
The code is written in TypeScript.
...
2
votes
0answers
37 views
Custom HTML Element with scrolling text
A junior developer here.
I wrote a simple javascript custom element code here: https://codepen.io/rndbox/pen/mdWxryw as clean as I could with some advice from Junior Vs Senior Code - How To Write ...
0
votes
2answers
62 views
How to refactor and reduce complexity of this code
code climate tells me this block of code has a Cognitive Complexity of 7 (exceeds 5 allowed). Any ideas how I would refactor this to reduce complexity?
...
0
votes
0answers
34 views
JavaScript optimize a function to check if a nested object is empty
My function needs to check if some nested object is empty.
For flat objects, there is no need of recursion, and a very basic function could be the following (inspired to PHP empty):
...
0
votes
0answers
14 views
Pulling data from an API and working with it in Google Sheets
I'm trying to build out some DeFi position tracking pages in Google Sheets. I want to pull from the Zapper API (or other APIs) to track trades, positions, gains, losses, fees...etc. This is my first ...
2
votes
1answer
37 views
Client side Pagination implementation in vanilla js
I have made this Pagination Class in JS which takes the following configurations :-
Total records
Records per page
Visible pages
The idea is simple that any instance created using this Pagination ...
1
vote
0answers
70 views
Find the number of carry operations needed to add two numbers digit by digit
I don't know if my test cases at the bottom cover every case, or if my mathematical logic in the reducer function is exactly right (referring to the math that starts with ...
1
vote
1answer
31 views
Managing duplicate class instances in a javascript Set
I have a class called Thing. For simplicity, let's say it initializes with a unique id, and that's all that's unique about it:
...
1
vote
0answers
12 views
Fetch the nearest city, optimised with Redis on a Lambda
I have a lambda function which returns the nearest city from a latitude and longitude.
My algorithm for this is resource heavy and time consuming. To optimise this, I hash the coordinates into a 6 ...
4
votes
2answers
314 views
Laravel 8 registration and login with user profiles
I am working on a Laravel application (Github repo) that requires user registration and login.
Alter registration, the users can change their registration details (except password, for which there is ...
5
votes
1answer
169 views
JavaScript discrete slider web component
The standard HTML range input element suffers from a number of limitations that caused me to implement the web component presented here.
First, it is unnecessarily complicated to style the standard ...
1
vote
2answers
53 views
Filter results by a search term
The below code filters my contacts according to a search term the user typed.
Is there a way I can avoid explicitly writing all the object keys but keep the ...
2
votes
2answers
57 views
Find the 10001st prime number
Project Euler 7: What is the 10 001st prime number?
I currently have this code:
...
2
votes
1answer
190 views
To-do app front-end in Vue 3
I have put together a To-do Application with the Slim framework on the back-end (API) and a Vue 3 front-end. I added a demo on my YouTube channel.
In the main App.vue file I have:
...
0
votes
2answers
62 views
Reload control using loop
I created this working sample and the code is below. Any advice on how to make this code; cleaner, more effective, just overall better! The data is coming from an API and I need to parse, select the ...
2
votes
1answer
39 views
basic paging function, is there logical problems with the JavaScript part?
Basic paging function, is there logical problems with the JavaScript part?
very basic paging function.
I want to know if there are some problems in the logic of the code.
I feel the JS code is a bit ...
4
votes
1answer
58 views
How to make my code shorter. This Code formats Credit card number. Vanilla JS
How to make my script shorter and better? This code allows only digits, auto-format card number like this XXXX XXXX XXXX XXXX. if user hits delete or backspace to delete space in between digits, ...
0
votes
0answers
17 views
Convert fs code to fs-extra using node js [duplicate]
i have code which used to read directory recursive and with given depth but i have wrote this code by using var fs= require("fs");
so my code look like ...
1
vote
1answer
41 views
simplifying regex expression for timestamp
I was wondering if it's possible to simplify this regex string (JS):
...
3
votes
2answers
56 views
concise way to build an object from an array of objects
The following code is working as expected but I'm wondering if there's a way to use Object.assign, or some other approach, to build the ...
0
votes
2answers
63 views
Simplifying the array of objects with comma separated values
Looking a way to reduce the below code to get comma separated values from the list of arrays
By using ECMA or plain old vanilla JS. How should we achieve this?
Actual Array Data:
...
0
votes
1answer
45 views
Fizz Buzz function that returns an array [closed]
I am a newbie to JS and I am working on a FizzBuzz challenge. Below is what I have tried. Essentially when the function takes a value then it would iterate from 1 up to the value and an array would ...
1
vote
1answer
29 views
Cleaning up and optimizing JavaScript code to check if an object contains a key that is present in a map
I have written the following code. It checks to see if the object contains the key where the key is present in the map.
...
