A mistake in Introduction to Lua

Solar2D Lua Language
1

I am reading “Introduction to Lua” (in Corona Basics):

You can comment out a full block of code by surrounding it with –[[ and ]]. To uncomment the same block, simply add another hyphen to the first enclosure, as in —[[.

Try to do that, I mean uncomment by adding an extra hyphen, and you’ll get something like

unexpected symbol near ']'

This is because you’ll have a couple of rogue square brackets in your code, those closing the multiline comment:

---[[entire block commented out print( 10 ) print( 15 )]] -- \< problem

This is in fact an erroneous attempt to follow an advice given by Roberto Ierusalimschy in his “Programming in Lua”. The original advice goes like so:

A common trick to comment out a piece of code is to enclose the code between --[[and --]], like here:

–[[

print(10)       – no action (commented out)

–]]

To reactivate the code, we add a single hyphen to the first line:

—[[

print(10)       –> 10

–]]

2

Can you provide me the URL to this?

The code should be:

---[[entire block commented out print( 10 ) print( 15 ) --]] -- \<notice the two --'s in front of the ]]

Rob

3

Aha, I did manage to open that page in such a way that I got its URL:

http://docs.coronalabs.com/guide/start/introLua/index.html

When you open this page (or any other page) from the Corona University, it opens in a sort of modal popover which is quite a pain to manipulate on an iPad. Unfortunately, this kind of web UI is quite fashionable these days.

4

Can you provide me the URL to this?

The code should be:

---[[entire block commented out print( 10 ) print( 15 ) --]] -- \<notice the two --'s in front of the ]]

Rob

5

Aha, I did manage to open that page in such a way that I got its URL:

http://docs.coronalabs.com/guide/start/introLua/index.html

When you open this page (or any other page) from the Corona University, it opens in a sort of modal popover which is quite a pain to manipulate on an iPad. Unfortunately, this kind of web UI is quite fashionable these days.