[this_user]

Of course you can write code using cat but there is no good reason to do so. That would be like being a carpenter who refuses to use powertools and instead relies on manually operated ones. If you don't understand how to use the tools of the trade that will greatly improve your productivity, then you simply are not a professional.

[mbrock]

You don't know that there's no good reason to do what I do. I use many different tools. Try ed sometime, it might improve your productivity. Professional? I deliver and get paid.

[EC1]

How about some specific examples instead of "I use `cat` and I'm right"?

>You don't know that there's no good reason to do what I do.

Exactly. Show us.

[mbrock]

What does it matter if I'm "right" about using a fundamental Unix command to enter text once in a while? What do you think I'm arguing, that cat is the best text editor and everything else sucks? Some guy said I'm not a professional even before I had a chance to give an example, which is rude and ignorant.

[u02sgb]

"No good reason to do so" is a bit strong, what about basic concatenation of two files when you're working at the command line `cat file1 >> file2` is much faster than anything else.

The OP may not be talking about editing files line by line.