How to remove blank entries in an array and replace them with proceeding values?

I have an array elements with values and blank spaces. I want to arrange the elements such that the array only contains values eliminating blank spaces and rearrange the array with cotimuous values.  I am using a bollean array to fill in the elements, so the bolleans with false value fill in blank spaces which I dont want. How can I program the above operation?

Thank you,