I'm trying to use JavaScript's map function to extract names from an array of objects. I expected it to return an array of names like ["Alice", "Bob", "Charlie"], but it ...

I have a large dataset of over 43 million rows and 3.84 GB and another dataset of over 6000 rows and 459 KB. I am trying to do an inner_join() based on two columns: One exact column based on a common ...

I am merging a folder 250 of large .txt files each approximately 1GB and over 6 million rows. I'm merging this folder with another .txt file outside of this folder that is also 1GB based on a common ...

When using Typescript and passing an arrow function into another function as parameter, what would the type callout be? My situation is with React components, and I'm trying to pass an activation ...

While reading about 'this' keyword and arrow function, I read: that arrow functions binds to whatever execution context the surrounding scope has. I have attached a simple code example below. When I ...

I have built a function in preload.js that gets a JSON file sent from main.js. renderer.js loads it fine, but I can't seem to give the data to another variable outside of the arrow function. main.js ...

I have a Model called Service which migration is as follows: Schema::create( 'services', function( Blueprint $table ){ $table->id(); $table->json( 'data' ); $table->dateTime( '...

I have an issue. I am learning JavaScript coding from a book I got and it is going pretty well. I went from not knowing anything at all to knowing how to store, modify and use data in about a week, ...

I generate a code for graphviz. This network plan always contains 2 arrows for there and back directions. Unfortunately, 2 separate arrows are displayed in the example - but I don't want that... ...

The first arrow function in flatMap does not get me what I need, the second arrow function does. I need to turn data into the flat name array ['John', 'Jane', 'Bob'] const data = [ [{ name: 'John',...

So my intention is to fetch the data from Firestore with an onSnapshot method (as it automatically updates when a change occurs) and then write it inside a variable. I tried it with this: let ...

I just wanted to know how does this work, if I have an onChange() onChange={() => input()} The above code immediately executes the input function when onChange() is triggered. But what about this, ...

I am trying to add a method to the Person constructor function but keep getting an output of "Hello undefined" function Person(name, age) { this.name = name; this.age = ...

I am trying to build a simple to-do list where each task can be edited by clicking on edit button which shows a previously hidden text field in which user can enter new name for the current task, for ...

The wrapper function takes two inputs, one is the component and the other is the class name. My question is, why didn't we directly use jsx codes after return? Why did we put an arrow function after ...