Does anyone know of a simple, easy way to delete empty array elements?

For example:

champ(0) = "one"
champ(1) = "two"
champ(2) = ""
champ(3) = "eight"
champ(4) = ""
champ(5) = "twenty"

How can I get rid of champ(2) and champ(4) while leaving the rest of the data intact?

Thanks,

Chris