Skiplist

Hello Forums,

I have a question about skiplist , I want to save two values , in skiplist is put (skiplistname , key , value) , could I use both key and value later .

my code is

Skip noList = create()
//......
put (noList,iRefNo,abs)
//...

int absNum
Object oEnd
Object oStart
for o in m do {
absNum = o."Absolute Number"
if (find (noList,absNum)) {
Object End = Object absNum
for absNum in noList do {
Object oStart = Object abs
}
}
}
oStart -> oEnd// create links 

Regards,

Neven

Re: Skiplist
thsturm - Thu Sep 07 08:29:59 EDT 2017

The skip-find has an additional third (optional) parameter to capture the found data:

bool find(Skip s, type1 key [, type2 &data])

HTH

Re: Skiplist
Control17 - Thu Sep 07 08:57:44 EDT 2017

bool find(Skip s, type1 key [, type2 &data])

Hello Thomas,

thank u for your reply , do u know how can i get the third parameter

for my code i get error in line 11 "incorrect arguments for function (print)"

Skip noList = create()
//......
put (noList,iRefNo,abs)
//...

int absNum
for o in m do {
 absNum = o."Absolute Number"
 if (find (noList,absNum,abs)) {
print absNum "\n"
print abs "\n"
}
}

for my code i want to find if the absNum in skiplist is and print it with abs

Regards,

Neven

Re: Skiplist
thsturm - Thu Sep 07 09:19:27 EDT 2017

Skip noList = create()
//......
put (noList,iRefNo,abs)
//...

int absNum
for o in m do {
 absNum = o."Absolute Number"
 if (find (noList,absNum,abs)) {
print absNum "\n"
print abs "\n"
}
}

What type is 'abs'?

Please read the 'Skip list example program' in the DXL Reference Manual, chapter 6, General language facilities, Skip lists.

Re: Skiplist
Control17 - Thu Sep 07 09:23:54 EDT 2017

abs is int

Re: Skiplist
Mike.Scharnow - Thu Sep 07 17:06:11 EDT 2017

are you sure? Did you define "int abs" at the beginnng of your program? Otherwise I cannot understand the error you get.

"incorrect arguments for function (print)" means that the argument to print is not a string. 

abs is integer, "\n" is string. integer variable concatenated with string gives a string variable, so there should not be a problem.

Re: Skiplist
thsturm - Fri Sep 08 03:12:15 EDT 2017

int abs = 42
print abs "\n"

=>

42

Re: Skiplist
Control17 - Fri Sep 08 04:06:06 EDT 2017

Hello Mike ,

yes , I define abs als int

this is the complete code

pragma runLim, 0
Module m = current
Object o = current 

filtering off

Regexp Reference = regexp2 "\\[[I][t][_]+([0-9]+)\\]"
Skip numList = create() 
for o in m do {
  string theText = (o."Object Text" "") (o."Object Heading" "")
 while (!null theText && Reference theText) {
 string RefNum  
    RefNum  = theText[match 1]
    int abs = o."Absolute Number"
    int iRefNum = intOf realOf RefNum
 put (numList,iRefNum,abs)
    }
     theText = theText[end 1 +1:]  
 }                                                                      

  
int absNum
for o in m do {
 absNum = o."Absolute Number"
 if (find (numList,absNum,abs)) {
 print absNum "\n"
 print abs "\n"
  }
}

Regards,

Neven

Re: Skiplist
Mike.Scharnow - Fri Sep 08 06:49:13 EDT 2017

pragma runLim, 0
Module m = current
Object o = current 

filtering off

Regexp Reference = regexp2 "\\[[I][t][_]+([0-9]+)\\]"
Skip numList = create() 
for o in m do {
  string theText = (o."Object Text" "") (o."Object Heading" "")
 while (!null theText && Reference theText) {
 string RefNum  
    RefNum  = theText[match 1]
    int abs = o."Absolute Number"
    int iRefNum = intOf realOf RefNum
 put (numList,iRefNum,abs)
    }
     theText = theText[end 1 +1:]  
 }                                                                      

  
int absNum
for o in m do {
 absNum = o."Absolute Number"
 if (find (numList,absNum,abs)) {
 print absNum "\n"
 print abs "\n"
  }
}

You defined "int abs" only inside your second block ({}), beginning with string refnum, ending with put(..). Outside this block, abs is not defined.

The first chapter of DXL Manual -> Language fundamentals, called "Auto-Declare", explains how you can disable the auto-declare functionality. If you do this, DOORS will warn you when you access undeclared variables.

About validity of variables, read DXL Manual -> Introduction -> Identifiers -> Scope