I use Emacs and Vi, using either of these, well, makes you productive. Touting one over the other is never productive. More productive would be for vroom to add a library of FAQ (Flames, Anathemas, Quips), to factor out repetition ;)

I have a one-liner library of perl commands, idiomatic lines..stuff that is too small or generic to justify being in a function or object, respectively.

Being a sick puppy I'll some-day put it into CVS so I could refine the code as I comprehend more. This may make for one liners that are tricky to read, I comment the code.

In defence of my last statement: one place I used to work used a convoluted code generator that produced C code, invariably with 3 levels of redirection, soon everyone could read it, it took exposure to it.

Part of my productivity issue is I try to write terse comments like merlyn's replies to postings.

"It takes me an age to strip out the unnecessary stuff." =~ 
"being concise takes time"
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Brother Frankus.