CODEWITHSUNDEEP
listjointclnewlinecarriage-return
Vachenzo
Vachenzo

Reputation: 1

Joining List on Carriage Return

In TCL, when joining a list on a carriage return like so:

set myList {{a} {b} {c} {d} {e} {f} {g}}
puts [join $myList \r]

The output printed to the screen is:

g

If I instead do the following:

set myList {{a} {b} {c} {d} {e} {f} {g}}
puts [join $myList \n]

The output is

a
b
c
d
e
f
g

What makes the use carriage return "\r" in the join only produce "g" while the use of newline "\n" gives me everything in the list?

Upvotes: 0

Views: 456

Answers (1)

Jerry
Jerry

Reputation: 71598

This has more to do with the output than with Tcl join. Your output (a console/shell for example) may not be able to display carriage return.

For instance, if you do:

set myList {{a} {b} {c} {d} {e} {f} {g}}
set result [join $myList \r]
puts [string length $result]

You get 13 as the output, showing that the string is correct.

If you can change the output location to a text file for example, and then open the file in an editor that can recognize carriage return as a character that denotes a change in line (I used notepad++ to test), you'll see the output is fine.

Upvotes: 1

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