Examples for form field elements

Hi, do you have any better examples showing how to set different form field elements?
In your documentation you show:
textarea - Use a textarea.
'textarea' => array('rows' => 5, 'cols' => 30)
col_header_info - Set html attributes or css styles to go in the column header.
'col_header_info' => 'width="150" style="border: 1px solid #333;"'
input_info - html attribute hash that will be added to the input, select or textarea tags on add and edit.
I am particularly interested in textareas, width etc. Your example files don't seem to show any example uses for this. I tried adding these like this: $tableColumns['edu_text'] = 'textarea' => array('rows' => 5, 'cols' => 30); but gives a parsing error.
Thanks in advance!
In your documentation you show:
textarea - Use a textarea.
'textarea' => array('rows' => 5, 'cols' => 30)
col_header_info - Set html attributes or css styles to go in the column header.
'col_header_info' => 'width="150" style="border: 1px solid #333;"'
input_info - html attribute hash that will be added to the input, select or textarea tags on add and edit.
I am particularly interested in textareas, width etc. Your example files don't seem to show any example uses for this. I tried adding these like this: $tableColumns['edu_text'] = 'textarea' => array('rows' => 5, 'cols' => 30); but gives a parsing error.
Thanks in advance!