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BOOK Beginning Linux Programming, 3rd Edition
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Old September 12th, 2004, 09:49 PM
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Default Chapter 2: Use of :- in cd_db

The code ':-' appears in three different locations apparently unrelated to parameter expansion in the 'cd_db' CD project which concludes Chapter 2.

1. function: set_menu_choice()

    echo "Options :-"

2. function: update_cd()

    echo "Current tracks are :-"

3. function: list_tracks()

    echo "$cdtitle :-"

Since in these three locations ':-' does NOT occur in the context of parameter expansion (as discussed on p 71, e.g., ${param:-default}), I don't see what ':-' adds here ... except for confusion.

Jim Keenan

Just Another Perl Hacker
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Old August 25th, 2006, 11:11 AM
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I believe they are being used as part of the text you should see.
for example the line
echo "Options :-" will echo all characters in quotes, so you will see

Options :-

it is just text, not a parameter expansion.

good day

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