AllGridOrientations returns the 8 possible orientations of a given grid i.e.

CaesarShift performs a forwards caesar shift of a given shiftAmount.

CombinationsInts returns all combinations of an input slice of a given length.

MirrorStringGrid returns the grid mirrored over the y-axis (i.e.

PermuteIntSlice will make all permutations of the numbers input.

PermuteString generates all permutations for a given string.

PermuteStringSlice will make all permutations of a string slice.

RandomInt returns a random int from zero through upper - 1.

RotateGridInts will transpose a 2D array of ints.

RotateGrid returns the inputted grid, rotated counterclockwise call it multiple times for 180, & 270 degree rotations.

SlidingWindowSum returns the left and right indices of a window within the nums slice, where all numbers in the slice [left:right] sum up to targetSum It also returns a boolean indicating if a valid window is found.

SplitStringOn is like strings.Split but takes in a slice of strings that are all used as dividers in the incoming string.

ThreeSum returns the three values within a slice that sum to the target input and a boolean stating if a match was found.

TwoSum returns the two numbers found within a slice that add up to the input target, and a boolean to check if the sum is found or not.