Questions tagged [ecmascript-6]
ECMAScript 6 reached feature complete status in 2014. The features vary widely from completely new objects and patterns to syntax changes to new methods on existing objects.
511
questions
-2
votes
0answers
18 views
For The Ambulance Class, this.sirens displays as 'undefined'. I cannot find why [closed]
When I run the code, I get this.sirens result show as 'undefined'.
...
0
votes
1answer
17 views
Bidirectional numeric (floating point) sequence iterator
I wanted a neat iterator that will always give me neat sequence of step spaced numbers. This is what I came up with, but I am a bit skeptical that I covered all ...
4
votes
2answers
71 views
Process strings of operations
This was the task (I don't know the exact wordings anymore):
You get a string with operation as input:
if it is a number push it to stack
if it is "DUP", then duplicate the one one top ...
6
votes
2answers
132 views
Turtle Doodle (my first web app)
Turtle Doodle presents several panels which arrange themselves responsively. There is a canvas where the Turtle will move, leaving a paint trail behind him. A control panel allows various commands to ...
-2
votes
1answer
35 views
I was given an assignment on writing a javascript ES6 program for vehicles. Am I writing this correctly? Any advice or tip? [closed]
I'm taking an online course in website development and we're going over JavaScript ES6, but my professors lecture and notes I've taken we're not very helpful more resourceful with the assignment I was ...
3
votes
2answers
87 views
Health Test App, It Returns a Score Based on the Answers Given
Here is my parent component: App.vue. I was wondering what improvements I could make to the code here.
Application Description
This application was built off the Vue.js framework and utilizes a
...
2
votes
1answer
36 views
Loading KML files into leaflet Javascript map
This is working code for input KML files into leaflet map
...
8
votes
3answers
651 views
Weapon class firing logic in JavaScript
I'm making a program to compare Borderlands 3 weapon damage over time in a graphic. There's still some work to be done, like implementing elemental damage, but I'd like to know if I'm doing a good job ...
8
votes
1answer
230 views
“Block a website” script with vanilla JavaScript
I use this script to block access to a one or more websites with vanilla JavaScript. I find that it helps me avoid some addictive news websites that make me depressed. (Credit to Marat Tanalin for ...
1
vote
0answers
23 views
Promise-based AJAX calls base class
I am more than willing to use both a Promise library and an AJAX calls one if the situation calls for it. This base class sits at the very bare bones of my system and it needs to be done right.
My ...
4
votes
2answers
105 views
An ES6 array of numbers - Double last number, delete the first number
I'm writing a JavaScript function for an array, based on a geographic sequence. \$[1, 2, 4, 8, 16]\$, etc.
This function needs to populate the next number in the sequence
$$item_n = item_{n-1} * ...
7
votes
2answers
153 views
eCommerce Mockup App in JS
I have completed this mockup eCommerce app using Javascript. This version can add products into a shopping cart and automatically calculate the order summary in the shopping cart. It can also delete ...
6
votes
1answer
111 views
Simple input class change with vanilla JS
I am just testing how I solved simple stuff.
Goal: The aim is to expand the width of an input and collapse it.
When mouseover ...
3
votes
2answers
63 views
A basic trivia app
The app grabs 10 questions from an API, displays them one by one with 4 multiple choice answers. These answers are clickable buttons that alert to whether the answer is correct or not. Finally the ...
1
vote
1answer
53 views
Flattening the nested Objects
The original idea behind the problem is that the API I'm working with returns one type of a response for GET, and requires another type to do ...
4
votes
1answer
44 views
JavaScript HTML DatePicker
I'm still new in javascript and learning. I want to create a date picker using html and javascript. Below is what I have tried and it's working, so my question is "how can I do it better?" My idea is ...
8
votes
5answers
729 views
Expanding powers of expressions of the form ax+b
I solved the following problem:
Write a function expand that takes in an expresion with a single, one character variable, and expands it. The expresion is in the form ...
1
vote
1answer
55 views
3
votes
2answers
63 views
Sort, slice and rebuild new object with array data
I'm using the matomo reports api to pull out some data in js.
For some charts, I'm in the need to sort the array data based on inner property value ("val"), further to get only the 3 highest (Hong ...
0
votes
0answers
21 views
Multiple animation control using Vanilla JS ES6
What I'm doing
Divide members into five section, and apply animation for each member to reveal at first.
When I click the section, it is expanded to whole viewport and introduce detail about ...
4
votes
1answer
59 views
Event triggers for animations using vanilla ES6
I'm new to JS and wanna know right code style or approach to cod Vanilla JS using ES6. To practice this, I'm using ESLint JS code-style of AirBnb and referencing clean-code-javascript repo. However, I ...
0
votes
0answers
39 views
How to filter URL from the array list based on the string name with regExp?
The solution found to filtering pathname with customising current normalizeTme() function. For sure it is not the ideal way of ...
4
votes
2answers
73 views
An Express route, which renders a page, and makes use of socket.io
This is the code for a basic endpoint in my express app routes folder. This firstly renders a page, and then on a continuous loop, renders information about some random "Breaking Bad" character.
The ...
4
votes
1answer
78 views
Pivotting SQL Table Response to JSON in JavaScript
Issue
Our API returns two formats JSON and this SQL table format. I'm not sure what it is truly called so I'll give a few examples below. Like all API responses, it can be a list or a single response ...
6
votes
1answer
55 views
Border Radius Preview Tool
I am running through an app idea to help improve my knowledge of Javascript. The code attached performs the following:
Performs a regex on the input field to check it is value 0-9 If not,
it clears ...
4
votes
1answer
106 views
Pulling data from the GitHub API for user repositories
I'm looking for specific feedback on a major design change that I plan on making to my personal website (https://aleksandrhovhannisyan.github.io/).
Currently, the Projects section contains hardcoded ...
4
votes
1answer
50 views
Triggering a callback when user put in the Konami cheat code anywhere in the page
I wrote this just for some fun and also to practise my ES6 skills.
When user key in the Konami Cheat Code(⬆️⬆️⬇️⬇️⬅️➡️⬅️➡️🅱️🅰️↩️) anywhere in the page, it should trigger a callback. In the following ...
0
votes
0answers
24 views
Details/Dropdown toggler
I haven't had a great deal of time to build components using some of the more fun items that have come since ES6+ started hitting the scene, but figured I'd share a dropdown snippet I created and get ...
2
votes
1answer
42 views
Rendering JSON arrays of unequal length as a table
I have a website where my users can create "table-like" layout dynamically. So imagine that my users can upload a text document, and then append columns to the document, and the output will then be ...
4
votes
2answers
73 views
RegEx version control
this is my first time on this stack exchange :)
I created a little script to check for the latest version of specified API version available, but I am wondering if I am using the best way possible ...
3
votes
3answers
48 views
Simple javascript code to create an image caption
I'm trying to become better at javascript and have written a simple script that just creates some html from getting some details from some elements (e.g. the image alt text) and inserts it onto the ...
6
votes
4answers
1k views
Find all letter Combinations of a Phone Number
The task
is taken from LeetCode
Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A
mapping of digit to letters (just ...
2
votes
1answer
70 views
Given time intervals determine if a person could attend all meetings
The task is taken from LeetCode
Given an array of meeting time intervals consisting of start and end times [[s1,e1],[s2,e2],...] ...
0
votes
0answers
78 views
Merge Two Sorted Lists in JavaScript
The task is taken from LeetCode
Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two
lists.
...
3
votes
1answer
60 views
Whitelist for textarea and save input to file
I'm working with product codes, so a user can only scan these type of product codes into a textarea.
I don't know if my code is written the best way possible, or has good performance.
I'm using a ...
6
votes
1answer
173 views
Merge Intervals in JavaScript
This is a task taken from Leetcode -
Given a collection of intervals, merge all overlapping intervals.
Example 1:
...
2
votes
3answers
91 views
Jewels and Stones
The task
is taken from leetcode
You're given strings J representing the types of stones that are
jewels, and S representing the stones you have. Each character in S
is a type of stone you ...
2
votes
1answer
69 views
Number of Islands
The task
is taken from leetcode
Given a 2d grid map of '1's (land) and '0's (water), count the number
of islands. An island is surrounded by water and is formed by
connecting adjacent lands ...
2
votes
1answer
72 views
Length of the longest consecutive run of 1s in its binary representation
The task
Given an integer n, return the length of the longest consecutive run
of 1s in its binary representation.
For example, given 156, you should return 3
My function solution 1
Style 1
...
4
votes
2answers
71 views
Static site generator using JavaScript Promises
I have created a small static site generator (for learning purposes) in Javascript ES6, using Promises, but I am not certain of how to use them well. The code below works fine, but I wonder if i can't ...
3
votes
1answer
66 views
Longest Consecutive Sequence
This task is taken from Leetcode -
Given an unsorted array of integers, find the length of the longest
consecutive elements sequence.
Your algorithm should run in \$O(n)\$ complexity.
...
1
vote
1answer
38 views
Daily Temperatures
The task
is taken from leetcode
Given a list of daily temperatures T, return a list such that, for
each day in the input, tells you how many days you would have to wait
until a warmer ...
4
votes
1answer
121 views
Encode and Decode TinyURL
The task
is taken from leetcode
TinyURL is a URL shortening service where you enter a URL such as
https://leetcode.com/problems/design-tinyurl and it returns a short
URL such as http://tinyurl....
1
vote
2answers
97 views
Find out whether number is of Power of Two
The task
is taken from leetcode
Given an integer, write a function to determine if it is a power of
two.
Example 1:
Input: 1
Output: true
Explanation: 20 = 1
Example 2:
...
1
vote
1answer
78 views
Reverse Vowels of a String
The task
is taken from leetcode
Write a function that takes a string as input and reverse only the
vowels of a string.
Example 1:
Input: "hello"
Output: "holle"
Example 2:
...
3
votes
2answers
69 views
Add one to the last array element
The task
is taken from leetcode
Given a non-empty array of digits representing a non-negative integer,
plus one to the integer.
The digits are stored such that the most significant digit is ...
3
votes
1answer
54 views
Addition of Strings
The task
is taken from leetcode
Given two non-negative integers num1 and num2 represented as string,
return the sum of num1 and num2.
Note:
The length of both num1 and num2 is < ...
21
votes
4answers
4k views
Count all vowels in string
For a homework assignemnt, I was asked to complete this CodeStepByStep problem. It's coded correctly and gave me a right answer. I'm just wondering if there's an easier way to solve this problem ...
1
vote
2answers
81 views
First Unique Character in a String
The task
is taken from leetcode
Given a string, find the first non-repeating character in it and
return it's index. If it doesn't exist, return -1.
Examples:
s = "leetcode"
return ...
2
votes
2answers
84 views
Find All Numbers Disappeared in an Array
The task
is taken from leetcode
Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array),
some elements appear twice and others appear once.
Find all the elements of [1, n] ...
