CSV node.js，从文件到数组

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.

Answer 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>