inline comment and uncomment

[gaudetteje]

Hi,

I have a paragraph of text and want to comment out only part of it. I could place a '%' to start the comment and then use a single <CR> after the end of the comment. Is there another way so that I don't need to place <CR>s after every comment? Below is an example of what I'm trying to do.

Code: Select all  •  Open in writeLaTeX

This is my first sentence.  %This is a hidden comment.%  This second sentence should display.

This code should display:

This is my first sentence. This second sentence should display.

Thanks,

-J

[frabjous]

Best I can think of off the topic of my head would be to define a command that doesn't do anything, e.g.:

Code: Select all  •  Open in writeLaTeX

\documentclass{article}

\newcommand{\ignore}[1]{}

\begin{document}

This is my first sentence.\ignore{This is a hidden comment.} This second sentence should display.

\end{document}

Though you'll need to be careful with spaces. (E.g., don't put a space both before and after it.)

I think there are some better options, perhaps through the comment package, but I've never been able to make that package work as I wanted.

Perhaps someone else will be able to offer better advice.

[josephwright]

You could use an active character (risky and untested):

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\catcode`\|=\active
\def|#1|{}
Some text.|Invisible| Visible.

This will go wrong if you don't properly close the line ending, but things will recover at the end of a paragraph.

[gaudetteje]

Thanks for the help! Both appear to be equally valid. I think the "best" one comes down to personal preference.

[aaronmswan]

I'm somewhat new to Latex, but I think the following code makes a small improvement by ignoring white space after an inline command. It accepts the next non-whitespace character as a second argument and then displays it with no space in front of it.

Code: Select all  •  Open in writeLaTeX

\documentclass{article}

\newcommand{\ignore}[2]{\hspace{0in}#2}

\begin{document}

Notice there is a space before \ignore{This is a hidden comment.} and after this comment.

\end{document}