lwebber

function validParentheses(parens){
	
	if(parens[0] == ")")
	return false;
  if(parens[parens.length-1] == "(")
  return false;
	for(var i = 0; i < parens.length-1; i++)
	{
		if(parens[i]=="(" && parens.length%2 == 0)
		{

lwebber

// Write a method that takes in a string and an array of indices in the
// string. Produce a new string, which contains letters from the input
// string in the order specified by the indices of the array of indices.
// 

function scramble(str, indices){
	
	var result = [];
	
	for(var i = 0; i < str.length; i++){

lwebber

// # Write a method that takes in a number and returns true if it is a
// # power of 2. Otherwise, return false.
// #
// # You may want to use the `%` modulo operation. `5 % 2` returns the
// # remainder when dividing 5 by 2; therefore, `5 % 2 == 1`. In the case
// # of `6 % 2`, since 2 evenly divides 6 with no remainder, `6 % 2 == 0`.
// #

function isPowerOf2(num){
	var base = Math.log2(num);

lwebber

//check if a sequence follows an arithmetic or geometric pattern. return -1 if neither

function ArithGeo(arr) { 
 var arithchecker = false;
 var geochecker = false;
 
 for(var i = 1; i < arr.length; i++)
 {
 	var diff1 = arr[i] - arr[i-1];
 	var diff2 = arr[i+1] - arr[i];

lwebber

// # Write a method that takes an array of numbers in. Your method should
// # return the third greatest number in the array. You may assume that
// # the array has at least three numbers in it.
// #

function thirdGreatest(nums){
	nums.sort(function compare(num1, num2)
	{return num1 -num2});
	return nums[nums.length-3];
}

lwebber

function minusLastItem(array) {
  // your code goes here
  var minusLast = array.slice(0,array.length-1);
  return minusLast;
}


function copyFirstHalf(array) {
  // your code goes here

lwebber

https://repl.it/@wwebby1/area-of-a-rectangle-drill
https://repl.it/@wwebby1/temperature-conversion-drill
https://repl.it/@wwebby1/Is-divisible-drill-1

lwebber

Traffic Lights drill
 https://repl.it/@wwebby1/Traffic-lights-drill
 
Error Alert Drill
https://repl.it/@wwebby1/Error-alert-drill
 
 

lwebber

https://repl.it/@wwebby1/Creating-arrays-drill-1
https://repl.it/@wwebby1/Adding-array-items-drills
https://repl.it/@wwebby1/Accessing-array-items-drill
https://repl.it/@wwebby1/Array-length-and-access-drill
https://repl.it/@wwebby1/Array-copying-I-drill

Copying II Drill (Repl.it broken)
function minusLastItem(array) {
return array.slice(0, array.length-1)
}

lwebber

Max & Min Drill
function max(numbers) {
let max = numbers[0];
for (let i = 1; i < numbers.length; i++) {
if(numbers[i] > max)
max = numbers[i];
}
return max;
}