row 0: col1 =  "1"
row 0: col2 =  "1.0"
row 0: col3 =  "aa"
row 1: col1 =  "2"
row 1: col2 =  "2.0"
row 1: col3 =  "bbbb"
row 2: col1 =  "3"
row 2: col2 =  "3.0"
row 2: col3 =  "c c c"
row 3: col1 =  "4"
row 3: col2 =  "4.0"
row 3: col3 =  ""
testing search method:
results of search:
TabTable
col1	col2	col3
----	----	----
2	2.0	bbbb
3	3.0	c c c
2	2.0	bbbb
3	3.0	c c c
results after sort:
TabTable
col1	col2	col3
----	----	----
2	2.0	bbbb
2	2.0	bbbb
3	3.0	c c c
3	3.0	c c c

testing search method for single column:
results of search:
TabTable
col1	col2	col3
----	----	----
2	2.0	bbbb
