learnyounode

node.js

/* Write a program that accepts one or more numbers as command-line arguments
  and prints the sum of those numbers to the console (stdout).*/

var array = process.argv;
var sum = 0;
for(var i = 2; i < array.length ; i++){
    sum+= Number(array[i]);
}
console.log(sum);


/*
Write a program that uses a single synchronous filesystem operation to
  read a file and print the number of newlines (\n) it contains to the
  console (stdout), similar to running cat file | wc -l.
*/
var fs = require('fs');
var path = process.argv[2];
var readFile = fs.readFileSync(path);
var string = readFile.toString();
var array = string.split("\n");
console.log(array.length - 1);

var fs = require('fs');
var numberOfNewLines = fs.readFileSync(process.argv[2],'utf8').split("\n").length;
console.log(numberOfNewLines-1);

/*Write a program that uses a single asynchronous filesystem operation to
  read a file and print the number of newlines it contains to the console
  (stdout), similar to running cat file | wc -l.*/