How do you count rows of an array ?

lepierrot · June 2008

Hi,

I'm developping tests for a portal. One of the pages i'm working on displays an array with the number of elements it contains.
For example, I have a switch an many pc's connected on. Each time I add a new pc, the array has one more row. But let's think about this following case: a user that have a lot of pc's want to count them. That's why I'd like to know how can I count it.

When many devices are added, their common element is an image in the first column : _image("Edit this record") for the first one, _image("Edit this record[2]") for the second etc...

I thought I could make a "while" this way:

$i=0;
while(_assertNotNull(_image("Edit this record[$i]"))){
$i++;
}

In fact: while my row exist, I increment the $i variable. And in the end, $i represents the number of devices because the loop will stop when "Edit this record[$i]" no longer exists (so it's the last device connected) ...
But it doesn't work and sahi directly fails...I think it's because "_assertNotNull" doesn't send back any value, not even a "true" or a "false", so there is no condition in the "while" loop.

An idea ?

Thanks a lot

pankaj.nith · June 2008

Hi,

Try this if it works.
Suppose your array name is $arr.
Count the length as:
$arr.length;
It will return the number of rows your array has.

Regards,
Pankaj.

lepierrot · June 2008

Thank you for your answer.
I'll try it on monday but I need a precision first:

The problem is that the name of my table is weird : when I check a cell with "Ctrl" with sahi, Sahi tells me that the name of the cell is _table(cell(0,5) for example (I don't rememmber exactly!). I don't know what is it and my array seems to be not set as a "$array" variable. So what is the name of my array ?

pankaj.nith · June 2008

Hi,
Please elaborate. Post the piece of code if you can. That will help understand it better.

Regards,
Pankaj.

lepierrot · June 2008

Ok I will do this tomorrow when I'll be at my job !
Thanks for all

lepierrot · June 2008

Hi, the array which I want to count the rows of is the following:

img262.imageshack.us/my.php?image=sahi1ll3.png

As you can see, the accessor is : " _image("Edit this record[1]") "

and my code is :

function how_many_devices(){

        while(_assertNotNull(_image("Edit this record[$i]"))){
            $i++;    
        }
        
}

how_many_devices();

The goal is to manage to count how many devices are present in the array.

Thanks for help !

pankaj.nith · June 2008

Hi,

Try this if it works:

function how_many_devices(){
  var $i=0;
  while(_condition(_image("Edit this record[$i]") != null)){
            $i++;    
   }
  return $i;
}

var $rows = how_many_devices();

Regards,
Pankaj Kumar.

lepierrot · June 2008

Hi pankaj, thanks for helping me

I've ran your script and sahi always show me the same message:

saveCondition(_image("Edit this record[0]") != null);
saveCondition(_image("Edit this record[0]") != null);
saveCondition(_image("Edit this record[0]") != null);
saveCondition(_image("Edit this record[0]") != null);
saveCondition(_image("Edit this record[0]") != null);
saveCondition(_image("Edit this record[0]") != null);
...

It seems it does not go forward after the first test for "row 0"...

lepierrot · June 2008

I've replaced "null" by "undefined" but it's the same

pankaj.nith · June 2008

Hi,

I am sorry...my mistake...Try this.

function how_many_devices(){
  var $i=0;
  while(_condition(_image("Edit this record[" + $i + "]") != null)){
            $i++;    
   }
  return $i;
}

var $rows = how_many_devices();

Please lemme know if it works for you.

Regards,
Pankaj.

lepierrot · June 2008

One more time thank you for your help!

hum it's doing the same as before, but with the new syntax !

saveCondition(_image("Edit this record[" + 0 + "]") != null);
saveCondition(_image("Edit this record[" + 0 + "]") != null);
saveCondition(_image("Edit this record[" + 0 + "]") != null);
saveCondition(_image("Edit this record[" + 0 + "]") != null);
saveCondition(_image("Edit this record[" + 0 + "]") != null);
saveCondition(_image("Edit this record[" + 0 + "]") != null);

What is saveCondition ?

narayan · June 2008

function how_many_devices(){
var i = 0;
while(_image("Edit this record["+i+"]") != null){
i++;
}
return i;
}

_assertEqual(20, how_many_devices());

lepierrot · June 2008

Thank you

But still does not work ...

I don't understand, I've created some much more complicated functions that work perfectly, but this one doesn't want to ...

narayan · June 2008

What is the failure?

lepierrot · June 2008

The failure is :

_assertEqual(14, how_many_devices()); Assertion Failed. Expected:[14] Actual:[0]

As if it doesn't manage to count ...

lepierrot · June 2008

no more ideas ...?

tiho · June 2008

It is obvious that this can't work.
You have to declare a distinct variable for counting. If "Edit this record[0]" is null then variable i will never get incremented.
Try to use the following snippet:

function how_many_devices(){
var i = 0;
var count = 0;
while(_image("Edit this record["+i+"]") != null){
count++;
}
return count;
}

lepierrot · June 2008

Thank you for your answer, but it still doesn't work :

There is an error telling me that i is not defined, so I've replaced i by $i everywhere, and then the error is the following :

saveCondition(_image("Edit this record["+0+"]") != null);
saveCondition(_image("Edit this record["+0+"]") != null);
saveCondition(_image("Edit this record["+0+"]") != null);
saveCondition(_image("Edit this record["+0+"]") != null);

Same as before...

tiho · June 2008

Could you please post your code snippet?

lepierrot · June 2008

function how_many_devices(){
   var i = 0;
   var count = 0;
   while(_condition(_image("Edit this record["+i+"]") != null)){
       count++;   
   }
   return count;
}

var n = how_many_devices();

if(_condition(n>=10))
        _click(_link("Sim Array"));

Here it is

Thank you

pankaj.nith · June 2008

Hi,

You are using count and i in the loop but your i value is not changing.
while(_condition(_image("Edit this record["+i+"]") != null)){
count++;
}
Try:
while(_condition(_image("Edit this record["+count+"]") != null)){
count++;
}
or increment i also as it may be the case.
Also try using $n in place of n as it is not inside any schedular function I suppose.

Regards,
Pankaj.

tiho · June 2008

Ohh... I almost lost my nerves.. I have experienced the same failure. First I couldn't figure out what happens.. but then I took a look at the generated java script:

_sahi.scriptScope = function (){
_sahi.scriptScope.execute = function(s){eval(s);};

//Your code starts

function how_many_devices(){
var i = 0;
var count = 0;
while (true) {
_sahi.schedule("_sahi.saveCondition(_sahi._image(\"Edit this record[\"+i+\"]\") != null);", "C:\\Program Files\\sahi\\bin\\..\\scripts\\creatingClicks.sah&n=4");
if ("true" != _sahi._getGlobal("condn" + (_sahi.cmds.length))) break;//){count++;
}
return count;
}

As you can see the increment operation is commented out. This seems like a bug in the Sahi compiler. I also found a workaround:
Put an empty comment in the line before the increment.
This should possibly work:

function how_many_devices(){
var $i=0;
while(_condition(_image("Edit this record[" + $i + "]") != null)){
//
$i++;
}
return $i;
}

var $rows = how_many_devices();

lepierrot · June 2008

oh my god you are such a genius ... it works ...
Thank you to pankaj, narayan and of course you for having answered to my askings...
I won't hesitate to ask you again... :d

I couldn't find this alone... really thank you.

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How do you count rows of an array ?

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How do you count rows of an array ?

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