Associated array with list in tcl

Question

I'm beginner in TCL scripting and I'm trying to store list as part of associated array as below.

script:

set cellno 0
set red redcolor
set green greencolor
set blue bluecolor

set myVariable($cellno) {$red $green $blue}

puts [lindex $myVariable($cellno) 2]

problem:

For some reason puts [lindex $myVariable($cellno) 2] is displaying value as below

 $blue

Instead of

 bluecolor

Braces won't do variable substitution in Tcl. Try with double quotes as set myVariable($cellno) "$red $green $blue" — Dinesh
– Dinesh, Commented Sep 1, 2020 at 4:29
Does this answer your question? List passed to join doesn't produce the correct output — Jerry
– Jerry, Commented Sep 1, 2020 at 4:34

Andreas · Accepted Answer · 2020-09-01 06:55:45Z

3

This line:

set myVariable($cellno) {$red $green $blue}

...does not substitute the color variables since they are in braces. You could use double quotes:

set myVariable($cellno) "$red $green $blue"

Since you use it as a list using lindex, prefer list to avoid unintentional word splitting (and merging in case of empty string or whitespace only variables):

set myVariable($cellno) [list $red $green $blue]

answered Sep 1, 2020 at 6:55

Andreas

5,3334 gold badges23 silver badges45 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Donal Fellows Over a year ago

Using list like that allows Tcl to use a more efficient implementation than using double quotes.

Collectives™ on Stack Overflow

Associated array with list in tcl

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related