Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....( 0 ) # Put some data into header rows (A1:A4) i = 0 while i...get ( i , 0 ) . setValue ( "Header Row #{ i } " ) i += 1 end #...