Tag: javascript

Chunk array based on conditional logic using ramda

functional-programming javascript ramda.js

I have an array of sizes that I’d like to reduce + chunk based on custom logic using ramda: If the cumulative total exceeds the 50 threshold I would like to chunk them up, so that the result becomes: I’ve tried using reduceWhile and splitWhen but with no luck so far Answer Reduce the array to a new array. On…

How to deal with a TokenExpiredError: jwt expired?

javascript jwt node.js

I have a project with NodeJS with jwt for managing user authentication. After a period of time, my app stops working and my server prints the following: Now, the person who was working in this project before me had this code for managing the tokens: My guess is that the issue is the expiresIn: ‘7d&#8217…

Creating table with data from API using Redux

javascript react-redux reactjs redux

I’m attempting to get information about NBA teams using Redux, then put that data into a table. Right now I’m able to get the data from the API, but I’m struggling to figure out the correct syntax to display a table with the data I collect using Redux (I usually use getContext and am trying …

How to retry an async function with a delay in javascript?

async-await javascript node.js promise

I am trying to fetch a record from a database. Due to race conditions it is possible and even likely that the record isn’t there when I first try to fetch it. How do I wrap this in a retry logic without going mad? I seem to be too stupid for it This code should retry n times with a

How to render only new items in a react list and not re render the whole list

arrays javascript react-hooks reactjs timeout

My problem is when I have more than one object in the state every item of the list re-renders and they each have a deletion timeout (I want them to be deleted after an amount of time) which is reset at each re-render. I tried to use React.memo() and React.useCallback() to prevent the item in the list to re-re…

Image in span tag into an img tag

html javascript tags

I try to display an image with <img src=”” alt=”music cover”> using <span></span> to display the music covers of my web radio. The link is dynamic, it’s why I want to use the span tag for getting the url link of the image’s shown during music playback. I&#…

How do I save the content after the onclick?

html javascript

I already connected the html with js and I get the data from a form when the onclick is activated but since I save each data that I receive to use it later, how do I get the data out of the function without having problems: Answer You should create an external variable to save the data you want, when

this.$emit is not a function inside file reader onload

javascript vue.js vuejs2

I know about lexical scope that this keyword is pointing to the window and not Vue But how do I make it point to Vue? What I am trying to do is get csv data and parse it, I’m using d3 to parse the data it’s working fine, I am just unable to emit the event with the data because

Javascript Building a Nested Object (tree) from an very weird array Debugging

algorithm arrays javascript nested-object tree

I could really use some help Debugging a problem. Im trying to build a nested object (tree) from a very unusual array im getting from a backend (dont have access to the BE so i have to work with what i got). I’ve gotten 95 percent of it done but im running into a bug I know there are many