CSV node.js, from file to array

Question

I've been trying for ages now to no avail (some just returning 'null'). I'm trying to get this CSV (which will eventually contain over 2.2 million elements):

Rough,Lukk,black,Semnas,mickayrex

to be read into a javascript array.

Currently, I just have a fixed array

var usernames = ['mickayrex', 'black'];

and the goal is to be able to put all names from the text file into an array format as above to then use by rest of the program.

2.2 million elements i doubt that . There is a cap limit on the array element. Still you can look at this solution stackoverflow.com/questions/2858121/… which has already answered on conversion — NiRUS
– NiRUS, Commented Jan 16, 2016 at 11:39
@Nirus. Really, goal is to scrape about 2.2m names from a website and they'll be in the above format — Miniman
– Miniman, Commented Jan 17, 2016 at 5:27

gabrielperales · Accepted Answer · 2016-01-16 12:57:03Z

1

Here is a function from the book "JavaScript functional programming" for parse CSV to an array (I have modified it to avoid use underscore):

function parseCSV(str) {
  var rows = str.split('\n');

  return rows.reduce(function(table, row) {
    var cols = row.split(',');

    table.push(cols.map(function(c) {
      return c.trim();
    }));

    return table;
  }, []);
}

var frameworks = 'framework, language, age\n ' +
                 'rails, ruby, 10\n' +
                 'node.js, javascript, 5\n' +
                 'phoenix, elixir, 1';

var array = parseCSV(frameworks);
console.log(array);

var consoleEl = document.querySelector('#console');
consoleEl.innerHTML = 'Array content: '+array;

<div id="console"></div>

edited Jan 16, 2016 at 12:57

answered Jan 16, 2016 at 11:45

gabrielperales

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1 Comment

Miniman Over a year ago

But what how do you get it from the file?

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