Remove null values from array

[shobolos]

I have quite a complex formula which results in the following -

{"","a","","","","b",""}

I need to somehow remove the null values via a formula and just show a,b in the cell.

Any ideas.

 

[PCL]

Is the result you are showing a string or an array formula result?

 

[shobolos]

It's currently an array, but ideally I'd like it displayed as a string with the null values removed.

 

[PCL]

It means, if it is an array formula, we need to know this formula.