roppa

/*
 * object.watch polyfill
 *
 * 2012-04-03
 *
 * By Eli Grey, http://eligrey.com
 * Public Domain.
 * NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
 */

roppa

/**
Conform. We have a collection of objects with the possibility of having unique attributes.
We would like to ensure that each object in the collection has the same attributes. Handy for passing objects
to a CSV function that expects all objects to conform:

Example: var coll = [{a : "a", b : ""}, {a : "a", c : "c"}, {a : "a", d : "d", f : "f"}];
conform(coll);

@param array array of objects. 
*/

roppa

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

Array

Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.

roppa

How to make a script to run in your terminal

• Locate the path to the interpreter for the language you are writing in with the which command.

    which node
    which python
    which bash
    which ruby
  

• Add that path as an interpreter directive (using #!) on the first line of your script. For example if which node returned /usr/local/bin/node, the first line of your script should be:

roppa

let seating = (people) => {

  let result = [];

  (function permutations (left, right) {

    let current;
    let before
    let after;

roppa

function countLetters (string) {  
  let letters = {};
  for (let i = 0; i < string.length; i++) {
    letters[string[i]] = letters[string[i]] + 1 || 1;
  }
  return letters;
}

roppa

const flatten = (...args) => {
  let result = [];
  args.forEach(arg => {
    if (Array.isArray(arg)) {
      arg.forEach(element => {
        if (Array.isArray(element)) {
          result = result.concat(flatten(element));
        } else {
          result.push(element);
        }

roppa

'use strict';

/**
* Run through promises sequentially. Useful when breaking 1000s records into manageable chunks
*/

function processFile (filename) {

  return new Promise((superResolve, superReject) => {

roppa

set autoindent
set indentexpr=off
set expandtab
set tabstop=4

set sw=4
set textwidth=80
set nohls
set noshowmatch
syntax enable

roppa

const net = require('net');

const PORT = 6000;

const server = net.createServer((connection) => {
  console.log('created server');
  connection.on('data', (data) => {
    connection.write('pong\n');
  });
  connection.pipe(connection);