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I'm reading big csv files and mashing the lines into hierarchical objects for analysis and display. The csv might look like this:
YEAR,QUAD,SPEC,FIASP,COND,SZ2,SZ3,SZ4,SZ5,SZ6,SZ7,SZ8,SZ9
1984,4D1,1,129,1,1,0,1,1,0,1,3,0
1984,4D1,8,371,0,0,0,0,0,1,0,0,1
1984,4D1,9,375,1,0,0,0,0,0,0,1,0
1984,4D1...