special array cycles

Bob Smith

Guest

n/a Posts

August 24th, 2006
06:55 PM
#2

Re: special array cycles

On 8/24/2006 12:10 PM, padew wrote:

Quote:

Originally Posted by

Array so: for every value 1st column correspond one in 2nd
2 25
25 27
27 60
4 50
27 61
>
be able to write this
2 25,27,60,61
4 50
>
this steps:
-2nd isn't in right then rewrite in 1st column with its value (25)
-the 25 is also in 2nd column, then its value 27 go near 25
....
>
some particular code?

There are probably simpler ways to do this, but here's one:

a=[[2,25],[25,27],[27,60],[4,50],[27,61]];

function foo (x)
{
var z=[];

for (var i = 0; i < x.length; i++)
{
var y = x[i][0];
if (y 9)
y = Math.floor (y / 10);
if (z[y] == null)
z[y] = [x[i][1]];
else
z[y].push (x[i][1]);
}

return z;
}

As you can see, I'm presuming that you meant to truncate 1st col
numbers 9 to the tens (and beyond) digits.
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padew

Guest

n/a Posts

August 25th, 2006
02:15 AM
#3

Re: special array cycles

I have tested (see code below);
but I have some undefinid value.
Now I have:
undefined
undefined
25,27,60,61
undefined
50

anyway the result seem ok;

undefined is my bad code (can you correct?)
but I would like to have the first values 2 and 4
2 25,27,60,61
4 50
-------------
and if I use this
x=[[2,3],[3,4],[1,10],[16,12],[1,15],[2,16],[4,18],[16,19],[1,20],[6,23],[10,25],[10,26],[19,30],[25,32]];

what I must to change in the code?
I think 9 and 10, but change with 27 e 28?
I have now 14 element [ ] in X; is so?

for tests:

function foo ()
{ var var_box=document.frm.my_box;
var var_c=0;

x=[[2,25],[25,27],[27,60],[4,50],[27,61]];

var z=[];

for (var i = 0; i < x.length; i++)
{
var y = x[i][0];
if (y 9)
y = Math.floor (y / 10);
if (z[y] == null)
z[y] = [x[i][1]];
else
z[y].push (x[i][1]);
}

/*return z;*/
for (var ii = 0; ii<z.length; ii++)
{ var_box.options[var_c++]=new Option(z[ii]);}

}

</script>

<form method="post" name="frm" action="">
<select name="my_box" size="10" style="width:200px">
</select>
<br />
<input type="button" value="ok" onclick="foo()" />
</form>

Bob Smith

Guest

n/a Posts

August 25th, 2006
10:35 PM
#5

Re: special array cycles

On 8/24/2006 10:24 PM, padew wrote:

Quote:

Originally Posted by

I have tested (see code below);
but I have some undefinid value.
Now I have:
undefined
undefined
25,27,60,61
undefined
50
>
anyway the result seem ok;
>
undefined is my bad code (can you correct?)
but I would like to have the first values 2 and 4
2 25,27,60,61
4 50
-------------
and if I use this
x=[[2,3],[3,4],[1,10],[16,12],[1,15],[2,16],[4,18],[16,19],[1,20],[6,23],[10,25],[10,26],[19,30],[25,32]];
>
what I must to change in the code?
I think 9 and 10, but change with 27 e 28?
I have now 14 element [ ] in X; is so?
>
>
for tests:
>
function foo ()
{ var var_box=document.frm.my_box;
var var_c=0;
>
x=[[2,25],[25,27],[27,60],[4,50],[27,61]];
>
var z=[];
>
for (var i = 0; i < x.length; i++)
{
var y = x[i][0];
if (y 9)
y = Math.floor (y / 10);
if (z[y] == null)
z[y] = [x[i][1]];
else
z[y].push (x[i][1]);
}
>
/*return z;*/
for (var ii = 0; ii<z.length; ii++)
{ var_box.options[var_c++]=new Option(z[ii]);}
>
>
}
>
>
</script>
>
<form method="post" name="frm" action="">
<select name="my_box" size="10" style="width:200px">
</select>
<br />
<input type="button" value="ok" onclick="foo()" />
</form>

Perhaps I'm confused. If we start with

[[2,25], [25,27], [27,60], [4,50], [27,61]]

what should the result be?

Perhaps you want it to be

[[2, [25,27,60,61]], [4, [50]]]

or is it something else?

--
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padew

Guest

n/a Posts

August 26th, 2006
09:25 AM
#6

Re: special array cycles

Il Fri, 25 Aug 2006 22:42:10 GMT, Bob Smith ha scritto:

Quote:

Originally Posted by

On 8/24/2006 10:24 PM, padew wrote:

Quote:

Originally Posted by

>I have tested (see code below);
>but I have some undefinid value.
>Now I have:
>undefined
>undefined
>25,27,60,61
>undefined
>50
>>
>anyway the result seem ok;
>>
>undefined is my bad code (can you correct?)
>but I would like to have the first values 2 and 4
>2 25,27,60,61
>4 50
>-------------
>and if I use this
>x=[[2,3],[3,4],[1,10],[16,12],[1,15],[2,16],[4,18],[16,19],[1,20],[6,23],[10,25],[10,26],[19,30],[25,32]];
>>
>what I must to change in the code?
>I think 9 and 10, but change with 27 e 28?
>I have now 14 element [ ] in X; is so?
>>
>>
>for tests:
>>
>function foo ()
>{ var var_box=document.frm.my_box;
> var var_c=0;
>>
>x=[[2,25],[25,27],[27,60],[4,50],[27,61]];
>>
>var z=[];
>>
> for (var i = 0; i < x.length; i++)
> {
> var y = x[i][0];
> if (y 9)
> y = Math.floor (y / 10);
> if (z[y] == null)
> z[y] = [x[i][1]];
> else
> z[y].push (x[i][1]);
> }
>>
> /*return z;*/
> for (var ii = 0; ii<z.length; ii++)
> { var_box.options[var_c++]=new Option(z[ii]);}
>>
>>
>}
>>
>>
></script>
>>
><form method="post" name="frm" action="">
><select name="my_box" size="10" style="width:200px">
></select>
><br />
><input type="button" value="ok" onclick="foo()" />
></form>

>
Perhaps I'm confused. If we start with
>
[[2,25], [25,27], [27,60], [4,50], [27,61]]
>
what should the result be?
>
Perhaps you want it to be
>
[[2, [25,27,60,61]], [4, [50]]]

yes is so;

Bob Smith

Guest

n/a Posts

August 26th, 2006
07:35 PM
#7

Re: special array cycles

On 8/26/2006 5:32 AM, padew wrote:

Quote:

Originally Posted by

Il Fri, 25 Aug 2006 22:42:10 GMT, Bob Smith ha scritto:
>

Quote:

Originally Posted by

>On 8/24/2006 10:24 PM, padew wrote:

Quote:

Originally Posted by

>>I have tested (see code below);
>>but I have some undefinid value.
>>Now I have:
>>undefined
>>undefined
>>25,27,60,61
>>undefined
>>50
>>>
>>anyway the result seem ok;
>>>
>>undefined is my bad code (can you correct?)
>>but I would like to have the first values 2 and 4
>>2 25,27,60,61
>>4 50
>>-------------
>>and if I use this
>>x=[[2,3],[3,4],[1,10],[16,12],[1,15],[2,16],[4,18],[16,19],[1,20],[6,23],[10,25],[10,26],[19,30],[25,32]];
>>>
>>what I must to change in the code?
>>I think 9 and 10, but change with 27 e 28?
>>I have now 14 element [ ] in X; is so?
>>>
>>>
>>for tests:
>>>
>>function foo ()
>>{ var var_box=document.frm.my_box;
>> var var_c=0;
>>>
>>x=[[2,25],[25,27],[27,60],[4,50],[27,61]];
>>>
>>var z=[];
>>>
>> for (var i = 0; i < x.length; i++)
>> {
>> var y = x[i][0];
>> if (y 9)
>> y = Math.floor (y / 10);
>> if (z[y] == null)
>> z[y] = [x[i][1]];
>> else
>> z[y].push (x[i][1]);
>> }
>>>
>> /*return z;*/
>> for (var ii = 0; ii<z.length; ii++)
>> { var_box.options[var_c++]=new Option(z[ii]);}
>>>
>>>
>>}
>>>
>>>
>></script>
>>>
>><form method="post" name="frm" action="">
>><select name="my_box" size="10" style="width:200px">
>></select>
>><br />
>><input type="button" value="ok" onclick="foo()" />
>></form>

>Perhaps I'm confused. If we start with
>>
>[[2,25], [25,27], [27,60], [4,50], [27,61]]
>>
>what should the result be?
>>
>Perhaps you want it to be
>>
>[[2, [25,27,60,61]], [4, [50]]]

>
yes is so;

Try this instead

function foo (x)
{
var z={};

for (var i = 0; i < x.length; i++)
{
var y = x[i][0];
if (y 9)
y = Math.floor (y / 10);
if (y in z)
z[y].push (x[i][1]);
else
z[y] = [x[i][1]];
}

return z;
}

which actually returns

{2:[25,27,60,61], 4:[50]}

which should be easier to use.
--
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Bob Smith -- Join Bytes!

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padew

Guest

n/a Posts

August 26th, 2006
10:15 PM
#8

Re: special array cycles

now for test I use this, and see the result on popup;
but I not see similar that your result {2:[25,27,60,61], 4:[50]};
I not see 2 and 4;
for use with alert I chenge x (now inner function)
and z={}; in z=[];

can you write the code that you use for se the results?

my modified
function foo()
{

x=[[2,25],[25,27],[27,60],[4,50],[27,61]];

var z=[];

for (var i = 0; i < x.length; i++)
{
var y = x[i][0];
if (y 9)
{y = Math.floor (y / 10);}
if (y in z)
{z[y].push (x[i][1]);}
else
{z[y] = [x[i][1]];}
}

return alert(z);
}

Bob Smith

Guest

n/a Posts

August 28th, 2006
03:15 PM
#9

Re: special array cycles

On 8/26/2006 6:24 PM, padew wrote:

Quote:

Originally Posted by

now for test I use this, and see the result on popup;
but I not see similar that your result {2:[25,27,60,61], 4:[50]};
I not see 2 and 4;
for use with alert I chenge x (now inner function)
and z={}; in z=[];
>
can you write the code that you use for se the results?
>
my modified
function foo()
{
>
x=[[2,25],[25,27],[27,60],[4,50],[27,61]];
>
>
var z=[];
>
for (var i = 0; i < x.length; i++)
{
var y = x[i][0];
if (y 9)
{y = Math.floor (y / 10);}
if (y in z)
{z[y].push (x[i][1]);}
else
{z[y] = [x[i][1]];}
}
>
return alert(z);
}

Go back to using z={}; and then look at return z.toSource;

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