DavidGoussev

Use these rapid keyboard shortcuts to control the GitHub Atom text editor on Mac OSX.

Key to the Keys

• ⌘ : Command key
• ⌃ : Control key
• ⌫ : Delete key
• ← : Left arrow key
• → : Right arrow key
• ↑ : Up arrow key

DavidGoussev

/*

  Filter!
  
  Test 1
  Name your function filterOutOdds
  Write a function that takes a list and filters out all the odd numbers
  Takes one parameter, a list of numbers
  Returns a list with only the even numbers remaining
  */

DavidGoussev

/*
  ArrayList
  
  We are going to approximate an implementation of ArrayList. In JavaScript terms, that means we are
  going to implement an array using objects. You should not use arrays at all in this exercise, just
  objects. Make a class (or constructor function; something you can call new on) called ArrayList.
  ArrayList should have the following properties (in addition to whatever properties you create):
  
  length - integer  - How many elements in the array
  push   - function - accepts a value and adds to the end of the list

DavidGoussev

function bubbleSort(nums){
  var swapped = false;
  do {
    swapped = false;
    for(var i = 0; i < nums.length; i++) {
      if(nums[i] > nums[i+1]) {
        var temp = nums[i];
        nums[i] = nums[i+1];
        nums[i+1] = temp;
        swapped = true;    

DavidGoussev

function factorial(n) {
  var f = 1;
  if (n < 0) {
    throw "integer must be non-negative";
  } else if (n === 0) {
    return 1;
  } for(var i=1; i<=n; i++) {
    f *= n;
  }
  return f;

DavidGoussev

function power(n, e) {
  var f = 1;
  for (var i=1; i <= Math.abs(e); i++) {
    f *= n
  }
  return f === (e < 0) ? 1/f : f
}

DavidGoussev

function fib(n) {
  var a = 0, b = 1, f = 1;
  for (var i = 2; i <= n; i++) {
    f = a + b;
    a = b;
    b = f;
  }
  return f;
}

DavidGoussev

config = { _id: "m101", members:[
          { _id : 0, host : "localhost:27017"},
          { _id : 1, host : "localhost:27018"},
          { _id : 2, host : "localhost:27019"} ]
};

rs.initiate(config);
rs.status();

DavidGoussev

git rm -r --cached some-directory
git commit -m 'Remove the now ignored directory "some-directory"'
git push origin master

DavidGoussev

function palindromeChk(str) {
  return str = str.split('').reverse().join('');
}

// add following to remove any white spaces from phrases or sentences:
// str = str.toLowerCase().replace(/\W/g, '');