Add function to word wrap long character vectors

[jimhester]

This functionality is very useful in plot legends for instance.

Not sure if there is any active development on this package, but I thought I would send the pull request anyway...

[BrianDiggs]

What does this do that using base::strwrap does not? Or, if this does simplify use of existing base functions for specific purposes, why does it not use base::strwrap at its core rather than implementing its own word wrapping algorithm?

[jimhester]

It does not do anything that base::strwrap does not, I just had no
knowledge of that function existing before right now! Thanks for letting
me know, sorry for wasting everyones time. It would help if there was some
consistency to naming of base functions, but alas that ship has sailed.

Thanks again

On Wed, Nov 6, 2013 at 2:51 PM, Brian Diggs notifications@github.comwrote:

What does this do that using base::strwrap does not? Or, if this does
simplify use of existing base functions for specific purposes, why does it
not use base::strwrap at its core rather than implementing its own word
wrapping algorithm?

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Reply to this email directly or view it on GitHubhttps://github.com//pull/37#issuecomment-27907269
.

[BrianDiggs]

Not knowing every function in R is quite forgivable :)

Inconsistency in naming of base functions and their arguments is past fixing (as you noted), but there are packages which give more consistent interfaces. In this case, the stringr package does that for string manipulation (and provides a str_wrap function which does much of the simplifications you might want for the wrap function you wrote).

In fact, you could write your wrap function as

wrap <- function(width) {
  function(x) str_wrap(x, width=width)
}

which passes all the test cases you gave.

I'm not recommending that as code to use in the package, though, because it introduces a dependency on the stringr package which doesn't currently exist. Your most recent approach gets the essence of what str_wrap does for you.

[hadley]

This seems like a reasonable addition. Can you please:

1. Rebase/merge
2. Add a bullet to news
3. Use a longer name? I think wrap is a bit too general for this specific use

[jimhester]

Ok 1c0ea8f should be good to go once the build finishes.