Ifs & Lists

ID:178953
 
Mar 13 2002, 10:03 pm
Is there a way to create a conditional list?
Like I have a list. But then I only want things to show up in the list if their quanity is greater than 0. Otherwise you'll have a blank list if you have nothing.

LJR
Mar 13 2002, 10:16 pm
The simple answer is: only put things in the list if they have a quantity. But I don't think that's exactly what you're asking. Is this it?

proc/parselist(list/l)
var/list/parsedlist = list()
for (var/i in l)
if (l[i]) parsedlist[i] = l[i]
return parsedlist


With this proc, if you refer to a list like so:
Stat()
if (statpanel("Skills"))
parsedlist(src.skills)

it will display only items in the skills lists associated with a value. Again:

verb/practice(skill in parsedlist(src.skills))

will allow you to practice any skill in your list, as long as you already have a rating in it.
Mar 13 2002, 10:17 pm
Not that I know of, the easiest thing to do would be to just not add anything to the list that is <= 0. Or you could just remove them before using the list:

var/list/L = list(0,3,2,1,0,2,0)
while(L.Find(0))
L -= 0
Mar 13 2002, 10:30 pm
In response to Lesbian Assassin
var/tmp/list/jet
if (colonist > 0) jet += list("Colonist")

Well this is a snippet of my list. Its a tmp list to only be used for selection and will be null'ed after each use.
This is how I have it now to add the selection of Colonist if u have more than 0

This is suppose to be a list selection list and now that I look at it do I just need to do like += ("Colonist")??

LJR
Mar 13 2002, 10:59 pm
In response to LordJR
If you only have one item in the list what do you think happens?
Mar 13 2002, 11:06 pm
In response to Nadrew
Don't answer a question with a question silly. I know already that it skips the list and does whats left if its the only thing to do in the list. My worry is am I adding ("Text Selections") to the list???

LJR
Mar 13 2002, 11:07 pm
In response to LordJR
You are adding text to the list. What of it? I think you need to do some serious reading up on lists...
Mar 13 2002, 11:10 pm
In response to Lesbian Assassin
I have the Blue Book right reading..reading.. who's got the reading??? Its just I'm doing it a way I havent' done before so I just need clarification. Also the fact I'm at work right now and have no way of compiling to test this. Otherwise I would not ask here.

LJR
Mar 13 2002, 11:13 pm
In response to LordJR
Then wait until you can test it.
Mar 13 2002, 11:18 pm
In response to Nadrew
Why don't u stuff it! :P
BLAH!

LJR
Mar 13 2002, 11:19 pm
In response to LordJR
Don't make me go and stop helping you..
Mar 13 2002, 11:35 pm
In response to Nadrew
WHAT!?? Helping me?? In this thread you've contributed nothing to my knowledge base. :P

LJR
Mar 13 2002, 11:45 pm
In response to LordJR
Who said anything about this thread?
Mar 14 2002, 12:07 am
In response to Nadrew
I did! And this is my last post on it. BLAH! :P

Now back to programming....

LJR
Mar 14 2002, 4:40 am
In response to LordJR
LordJR wrote:
var/tmp/list/jet
if (colonist > 0) jet += list("Colonist")

Well this is a snippet of my list. Its a tmp list to only be used for selection and will be null'ed after each use.
This is how I have it now to add the selection of Colonist if u have more than 0

This is suppose to be a list selection list and now that I look at it do I just need to do like += ("Colonist")??

The first thing I'd do is make sure jet is initialized to list(). Then whenever you add text, just add the text (like +="Colonist") and don't worry about list("Colonist"). Both forms will work, but there's no need to make a new list only to destroy it again.

It sounds to me as if the vars you're trying to display really would be better off in a list already. But if they're not, you could try this:
var/tmp/list/jet=list()
var/list/varnames=list("Colonist","Food","Blue Things",...)
for(var/vn in varnames)
  // ckey(vn) makes "Colonist" into "colonist",
  // "Blue Things" into "bluethings", etc.
  var/n=vars[ckey(vn)]
  if(n>0) jet+=vn

This is a hacky solution that requires all your var names to be equal to the ckey() version of how they're displayed in the jet list. However, it's not a bad place to start. Alternatively, you could make varnames an associative list like this:
var/list/varnames=list("colonist"="Colonist",
  "food"="Food",
  "blue"="Blue Things")
for(var/vn in varnames)
  var/n=vars[vn]
  if(n>0) jet+=varnames[vn]

And in this example, the elements of varnames are the actual variable names, associated with the descriptive name you want to display.

Lummox JR
Mar 14 2002, 7:34 am
In response to Nadrew
Nadrew, your one line posts are never helpful.
Mar 14 2002, 8:45 am
In response to LordJR
Shouldn't you be, oh I don't know, working at work?