Given an array of numbers, reverse the order of the numbers in the array.
Given 2 arrays of numbers, return an array that includes all numbers that appear in both arrays.
Given a string and then a single character c
, write a function that will return a count equal to the number of occurences of the character c
inside the string.
Given two number variables, a
and b
, swap the values of those two variables. Try using only 2 variables!
Given a string, check to see if that string is a palindrome. A palindrome is a string that is spelled the same both frontwards and backwards (ie, racecar
)
Given an array of unique numbers and a target number, find all pairs of integers that can be summed in that array that will give the target number. If there are none return undefined
. Return the pairs as an array of arrays. Note: [a,b] and [b,a] can be treated as the same thing.
Example
targetSum([5,1,6,8,3,9],14) => [ [6,8],[5,9] ]
Given an input number n
, check if n is a prime number. A prime number is only divisible by 1 and itself. If the number is prime, return true and if not return false.
Given an unsorted array of numbers, find the second largest number in that array.