DGT questions

• Send form data from views to template
• How to check if an element of a list is a number?
• search for before and after values in a long sorted list
• replace empty string(s) in tuple
• rounding-up numbers within a tuple
• a list > a list of lists
• How to remove ^M
• remove/hide table's empty column(s), including <th>
• Django raising 404 with a message
• Shim for FileReader() in IE 9 [closed]

DGT answers