Javascript populate array from text file

These forums are now Read Only. If you have an Acrobat question, ask questions and get help from one of our experts. Registered: Mar 25 Posts: Registered: Feb 15 Absolutely this is possible, and we can give you an idea of how to get started, however you'll need to learn a bit about JavaScript to make this work in your form. Both files are stored on my local machine. I want to read in each line and store them in a JavaScript array as efficiently as possible.

How do you do this? As of at least Node 6, readFileSync returns a Buffer , so it must first be converted to a string in order for split to work:.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Reading local text file into a JavaScript array [duplicate] Ask Question. Asked 5 years, 11 months ago. Active 2 years, 7 months ago. Viewed k times. Improve this question.

William Ross. William Ross William Ross 2, 4 4 gold badges 34 34 silver badges 56 56 bronze badges. What is your JavaScript running? Is it embedded in a webpage? You just need to call the function from the onload event:. Depending on the data returned from your request, you can either use the FileReader to read the CSV content as a string first, or you just need to parse the string as an array if you already receive a string from your API.

Also, pay attention to the delimiter of your CSV file. The csvToArray function already has a sensible default delimiter which is a comma, but you may use other symbols. Learn the building blocks of JavaScript programming language like data types, functions, objects, arrays and classes.

Nathan Sebhastian is a software engineer with a passion for writing tech tutorials. Learn JavaScript and other web development technology concepts through easy-to-understand explanations written in plain English. Use the knowledge from the book to build a small but solid program. Learn more.

About Nathan Sebhastian is a software engineer with a passion for writing tech tutorials.