How to parse Text File to Array line by line?

Question

I have problem with my script. I don't know how to put text into array line by line :((

Text File

Bob
Marc
Will
Tony

Output

Array[0:"Bob", 1:"Marc", 3:"Will", 3:"Tony"]

How I can achieve this output???

I tried something like this...

const input = document.querySelector('input[type="file"]');

input.addEventListener(
  "change",
  function(e) {
    const reader = new FileReader();
    reader.onload = function() {
      const lines = reader.result.split(" ");
      let array = [];
      for (var i = 0; i < lines.length; ++i) {
        array.push(lines[i]);
      }
      console.log(array);
    };
    reader.readAsText(input.files[0]);
  },
  false
);

<input type="file">

Do you have any ideas. Thanks.

Result of code which I used look like this=> Array [0: "Bob, Marc, Will, Tony"] — Adam Szymański
– Adam Szymański, Commented Jan 27, 2021 at 21:58

Barmar · Accepted Answer · 2021-01-27 21:53:44Z

1

Use split("\n") to use newline as the delimiter, not a space.

You don't have to copy the array with the for loop.

const input = document.querySelector('input[type="file"]');

input.addEventListener(
  "change",
  function(e) {
    const reader = new FileReader();
    reader.onload = function() {
      const lines = reader.result.split("\n");
      console.log(lines);
    };
    reader.readAsText(input.files[0]);
  },
  false
);

<input type="file">

answered Jan 27, 2021 at 21:53

Barmar

789k57 gold badges555 silver badges669 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to parse Text File to Array line by line?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related