On Feb 15, 2005, at 5:08, James Edward Gray II wrote:

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$0 is the place where the cursor is placed after the snippet has been run.

Really? I thought that was $1. Then you can tab to $2, $3, etc.

By run I think he means “tabbed to the end”, i.e. gone through all the placeholders.

By default an implicit $0 is placed after your snippet, so e.g. if you write a snippet like: “foo $1 bar $2 fud” the caret starts at $1, you can tab to $2, but you can do a second tab to “leave” the snippet, and you end up just after “fud”, so in fact the snippet is: “foo $1 bar $2 fud$3”.

Sometimes this is not desired, take this snippet:

\begin{$1} $2 \end{$1}

Here we want to end between begin/end, but due to the implicit placeholder at the end of the snippet, a tab will take us outside this block. So instead we make it:

\begin{$1} $0 \end{$1}

Then TextMate knows that you do not want the implicit tab position after the snippet, because you used $0.

Hope that clarifies it...