ECMAScript (commonly referred to as JavaScript) is primarily used for scripting web-pages but also has several embedded forms and stand-alone interpreters / JIT engines. Use this tag for questions regarding ECMAScript 5 or 6 and its dialects / implementations: JavaScript, JScript, etc., excluding ...
0
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1answer
15 views
JavaScript function for to find a defined element within a nested array
Following task:
You've got an array which contains parts. Parts can contain subparts. Subparts can contain further subparts and so on.
For example:
...
0
votes
0answers
9 views
Collect several API call results
Want to brush up my rusty web dev skills. I want to call the twitch API for several channels and eventually call a callback function when all results are in without using a sync call.
I didn't work ...
0
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0answers
13 views
2
votes
0answers
13 views
Restructure of Node CORS middleware for unit test
How should one break this component down to better perform unit test on its behaviors?
Issues:
Authentication middleware component makes external request.
Must recognize preflight and final ...
0
votes
0answers
8 views
Simple channel broadcaster via NodeJS websockets
I have a system in PHP and I was asked to add some real time features. I was wanting to learn NodeJS so I considered a opportunity to kill two birds with one stone.
But after some search I was unable ...
0
votes
0answers
21 views
Binary search tree and breadth first search
I have written code to implement Binary Search and Breadth First Search in JS. Please review my code. I want to ensure Im following the best practices.
Node.js
...
3
votes
1answer
48 views
Event delegation without jQuery
I created event delegation like concept which is present in jQuery. AFAIK, event delegation is used to register an event for an element which is supposed to be added dynamically. So, in jQuery we do ...
3
votes
2answers
42 views
Count calls and update table accordingly
This is literally the first time I've ever used JavaScript so I know it's really bad and how to improve it just not how to implement it. Basically, I need to loop through all the elements instead of ...
3
votes
0answers
21 views
Count groups of open cells around a cell on a grid
Consider a 3x3 square surrounding a cell (marked @) on a grid:
0 1 1
1 @ 0
1 1 1
I need to find the number of groups of open cells (ones) surrounding the center ...
0
votes
2answers
47 views
Minimum element in a sorted rotated array
A sorted array [0,1,2,3,4,5] when rotated n times (3 times in this case) becomes [3,4,5,0,1,2], meaning elements in the front move to the end. The code below finds the minimum element in this array, ...
1
vote
2answers
83 views
Show/hide text field depending on select option
I'm new with JavaScript and need your advice. The idea is to show/hide text field depending on select option. I have a working code, but I believe it could be more readable and better. What have I ...
0
votes
0answers
23 views
PageVisibility API, to handle page/tab visibility changes
Currently, I'm working on a project where I needed to run some code everytime the page is hidden.
I searched high and low and found this question: Is there a way to detect if a browser window is not ...
-1
votes
1answer
38 views
0
votes
1answer
41 views
Calculating an object's stopping distance
I'm trying to smooth the movement of a cursor which has a set acceleration and max speed. I wrote this function to calculate the stopping distance of an object given its speed and acceleration, and it ...
2
votes
0answers
26 views
Weather Application - Reavling Module Pattern
I'm trying to practice and learn design patterns, and I decided to create a weather app using the revealing module pattern. How can I improve on this, and what mistakes did I make?
Main.js
...
1
vote
0answers
13 views
jQuery templating with ES6/ES2015 template strings
I have been using a particular pattern over and over again when I want to keep my jQuery apps more safe from XSS. I do something like this. (It uses ES6 template strings)
...
2
votes
1answer
28 views
Using fetch() and a new Promise object to get API results
I've written an ES6 function using the new fetch() API and returning a new resolved promise with a data object or a rejected promise with an error subclass.
I'm pretty new to both ES6 and Promises, ...
1
vote
1answer
11 views
Promise.spread “Polyfill”
I have written this "Polyfill" for Chrome's Promise object and I have some concerns about the implementation;
Does it actually work as designed? It seems to work ...
0
votes
0answers
7 views
Using an object to keep track of rooms and the users within them, for socket io
I'm using socket io. I need to keep track of rooms and the users within them as users leave and join. I've come up with this, is there a better more efficient way performance wise? Many thanks! :-)
...
2
votes
3answers
79 views
Javascript Ownership Cost Calculator
Javascript newbie here. I built a total cost of ownership calculator to calculate the cost of a business over 5 years. It has a lot of repeating script and prob way more congested than it needs to be ...
6
votes
2answers
81 views
Beginner's Calculator code
I am trying to learn AngularJS as a start to my revival of learning, I think that I am getting the hang of it so far, but would like to see what I can do differently with some super simple ...
0
votes
0answers
17 views
Event Delegates using IIFE or Module
I am learning jQuery/JavaScript best practices and am attempting to put them into practice. My overall goal is to have lots of small, independent .js files which contain specific functionality and ...
0
votes
0answers
14 views
Light-weight JavaScript VC Framework
I've always been frustrated with js frameworks in that they require you to learn a lot of custom syntax (ie angular). Typically also they tend to include a lot of extra baggage that takes away from ...
2
votes
1answer
42 views
Simple console directive, revised using provider
I recently created my first directive based on jQuery plugin and I asked for review here: Angular console like window - first directive
I've edited my directive so now instead of ...
1
vote
1answer
46 views
Converting an SVG polygon path from relative to absolute coordinates
This question was moved from StackOverflow as suggested by some users.
I developed a function that aims to (should) provide a simple and effective method to transform a polygon ...
2
votes
0answers
29 views
Node my Chatter
In an effort to teach myself Node.JS and truly delve into its communication capabilities, I elected to recreate a previous chatting project. It took a bit of forethought to acclimate code to the ...
3
votes
0answers
43 views
Slow multiplication in a modulo
I am willing to get a linear output of a product in a ring Z/nZ
For that I have successfully implemented a code that does a Product in a modulo
However, it is not optimized to output the steps ...
3
votes
1answer
52 views
Explosion animation plugin for a game
I have been writing a small particle plugin since I want to learn how physics works for games. Now I have tried to get this as clean as I possible could but It feels something is missing. Am I ...
1
vote
1answer
34 views
Angular console like window - first directive
I've asked question on SO how to rewrite jQuery code to Angular. Because I got no answers I've tried to create something by my own.
This is my version of code:
...
3
votes
2answers
176 views
Display or hide drawer with onClick
The following is my code for my "drawer" to be display or hidden on the basis whether it has been clicked or not. I want to make this better as personally its messy. Any tips?
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2
votes
1answer
67 views
Object-to-array flattening function
I have written a function that is designed to convert an object into an array of key/pair values ("flattening it") like so:
Input
...
0
votes
1answer
21 views
JavaScript function for logging the members of an object (with horizontal alignment)
When iterating over the members of an object for logging the keys / values one gets a "stair case" effect.
Therefore I wrote myself this function which takes care for a left-alignment of the values.
...
7
votes
1answer
60 views
JavaScript canvas sphere
I made a small demo in JavaScript using HTML5 canvas, which renders a rotating sphere. The sphere is generated by first creating a set amount of points (currently 50, represented by vectors) randomly, ...
6
votes
4answers
885 views
Python, JavaScript, PHP, HTML: Unbeatable Tic Tac Toe
At first, I created an unbeatable Tic-Tac-Toe in Python. However, I wanted a better interface, so I used a PHP backend that runs the script and a simple JavaScript that sends user commands to the ...
1
vote
1answer
58 views
Match values inside object and add them
Does the following code is written correct witout redundant code ?
or maybe using Jquery it can be written better?
I need to find matching between properties insdie oData & oPushObj
and fill ...
1
vote
2answers
137 views
Parsing two digits
This parses two digits and returns the rest of the string.
Input:
"20asg"
Output:
{ number: 20, left: "asg" }
Input:
...
4
votes
4answers
145 views
Helper function to format-output any type of variable
This question has already got some reviews, so I could partially improve my code: please look at my "own answer" below, which also contains comments about the review.
(I first added all that inside ...
1
vote
1answer
42 views
TicTacToe Win Checking
I decided to finally write up a Tic-Tac-Toe implementation. Since I'm currently learning web development, I decided to write it in JavaScript.
My main problem, and what I want reviewed here is my ...
2
votes
2answers
42 views
PE # 34 - “Digit Factorials” with no loops
I posted a similar question “Curious Numbers” (HackerRank PE 34) recently (but in a different language/platform altogether). I'm starting to learn JavaScript and decided to take the challenge again ...
2
votes
2answers
48 views
Using a timeout to simulate a spinner
I am going deep on this array in order to make an id comparison. I want to know if there is a way to use like a kind of flatten function to avoid using ...
0
votes
1answer
18 views
Angularjs alertservice and alertscontroller
I'm a .net programmer with littler experience in AngularJs and Javascript.
I have implemented an ...
1
vote
1answer
46 views
AngularJS controller to fetch and display employee data from database
This is the code for an AngularJS controller that I've written:
...
0
votes
3answers
87 views
How could I refactor this if statement?
I have a code which checks if any of the 4 textfields on our server contains text. If even one of the four textboxes is not empty, the generated table won´t skip that row and will draw it, otherwise ...
-3
votes
0answers
22 views
Need someone to help reviewing and improving my JS (javaScript) coding [closed]
I need my JS (javaScript) coding to be improved base on the following requirements:
PROPER EVENT BINDING: Consider using the preferred .on() method rather than .click(), .bind(), .hover(), etc. For ...
3
votes
3answers
84 views
Chess board in JS
I've completed the small challenge in the eloquent JS book to create a chess board pattern:
Write a program that creates a string that represents an 8×8 grid,
using newline characters to ...
1
vote
2answers
54 views
Sum all numbers in text using regexp
I would like to improve everything that can be improved. I don't understand regex a lot and what could be wrong. The main improve that I am looking for is related with errors. I want make the code ...
-1
votes
0answers
16 views
How filter a grid from a tree list
The Tree has a list of car ids, group by how old was the last update. User can select a group or just a few cars to watch on the detail grid.
Im using Jquery Ajax to call my WebApi.
With ...
0
votes
0answers
19 views
custom login method using JavaScript and Protractor
I have written login method in JavaScript using protractor. When Login method is called, this methods waits for element (txtLogin) to be present in DOM. Once it finds the element, credentials are ...
7
votes
1answer
69 views
Smoke the SmokeDetector
In Tavern on the Meta, our spam detector is a bot named SmokeDetector.
While you can ignore the bot, you can't ignore specific replies to Smokey without ignoring users, so I wrote a UserScript to ...
1
vote
1answer
68 views
Is Nesting Events a Good Practice in Javascript/JQuery?
I posted this question in stackoverflow and they told me it would be better served here so here it is:
Is there a more effecient way of changing the mouseout state ...
