CODEWITHSUNDEEP
dictionarytcl
Darkninja
Darkninja

Reputation: 517

Tcl: dictionary inside dictionary

I seem to have problem with getting Jim and Bob in the list named chicken. I know this is possible, to have a dictionary inside another dictionary which has a list of values. What am I doing wrong? 

puts [dict set farm tools hoe]
puts [dict lappend farm tools pitchfork]
puts [dict set farm animal cow Marry]
puts [dict set farm animal chicken Jim]
puts [dict lappend farm animal chicken Bob]
puts "chicken list: [dict get $farm animal chicken]"
puts "tool list: [dict get $farm tools]"

Output

tools hoe
tools {hoe pitchfork}
tools {hoe pitchfork} animal {cow Marry}
tools {hoe pitchfork} animal {cow Marry chicken Jim}
tools {hoe pitchfork} animal {cow Marry chicken Jim chicken Bob}
chicken list: Bob
tool list: hoe pitchfork

As you can see the tools list worked. but chicken list didn't work. Is there a problem in the way I structure my code? Im using dict lappend or dict get wrong? Anything would help to shed some light on this, Thank you.

Upvotes: 5

Views: 3260

Answers (1)

Darkninja
Darkninja

Reputation: 517

So I went to tcl chat room and they told me:

As described in the man page, dict lappends both chicken and Bob to the list in dict element animal.

You can't directly append to a list deeper in the dict.

One way would be:

dict with farm {
    dict lappend animal chicken Jim Bob
}

so ya, my bad. :P all credit goes to "schelte" in the tcl chat room.

Extra: the reason for why dict lappend works the way it does comes form Donal Fellows himself in the comments above, thank you Donal

Upvotes: 2

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