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In Vim, can I supply a format string, yank it, and paste it with formatted values in a range?. An example in Python 2 would be:

for i in range(1, 3): print "This is line %d" % i

If this is not possible in Vim, would it be so in Emacs, or another editor?

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2 Answers 2

up vote 0 down vote accepted

It's not completely clear to me what you want, but in Vim you could do something like this:

:for i in range(line('$')) | call append(i+i, printf("this is line %d:", i+1)) | endfor

The reason I use "i+i" is that, as lines are inserted into the buffer the line numbers change, and this corrects for that. (If you have a different "starting point" in your range, your correction algorithm will have to be more complicated.)

Or if you want to modify the existing lines in the buffer instead:

:for i in range(1, line('$')) | call setline(i, printf("this is line %2d: %s", i, getline(i))) | endfor

Of course, if you don't want to change the buffer, but just print to the screen, use "echo" instead of "call" and remove the append() / setline() chunks from around the printf().

See:

:help :for
:help :call
:help :echo
:help range()
:help line()
:help append()
:help setline()
:help getline()
:help printf()
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Perfect; thank you. I apologize for not being concise, but your second code example did exactly what I wanted. Since I'm new I cannot upvote, but I will when I can. –  doubleshot Feb 17 '12 at 22:49
    
Of course, there's another, arguably simpler way to do it: :%s/^/\=printf("This is line %d: ", line('.'))/ –  Heptite Feb 18 '12 at 2:36

In Emacs try:

M: (dotimes (i 3) (insert (format "This is line %2d.\n" (1+ i))))

Here M: stands for eval-expression

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For those who don't know Emacs: It's Alt + : –  Tom Feb 17 '12 at 17:13

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