cachematrix.R

## Functions to generate a class to retrive the inverse of a matrix
## with a build-in cache

## the class with api for setting & getting the matrix and its inverse

makeCacheMatrix <- function(x = matrix()) {
  m <- NULL
  set <- function(y) {
    x <<- y
    m <<- NULL
  }
  get <- function() x
  setInverse <- function(inverse) m <<- inverse
  getInverse <- function() m

  list(
       set = set,
       get = get,
       setInverse = setInverse,
       getInverse = getInverse
      )
}


## helper function to return the inverse of the matrix
## or retrive the cached value if exists

cacheSolve <- function(x, ...) {
  ## Return a matrix that is the inverse of 'x'
  m <- x$getInverse()
  if(!is.null(m)) {
    message("getting cached data")
    return(m)
  }
  data <- x$get()
  m <- solve(data, ...)
  x$setInverse(m)
        
  m
}