Vista - Next fucntion in loops?

Hi, I am trying to figure out if there is a next function or something
similar that will allow me force a loop to go to the next iteration.
Please advise.

Thanks,

MKielman wrote:
> Hi, I am trying to figure out if there is a next function or something
> similar that will allow me force a loop to go to the next iteration.
> Please advise.
>
> Thanks,

You can use "Continue" keyword
Here is an example

[^_^]PS[6]>for ($i = 0; $i -lt 10; $i++) { if (($i % 2) -eq 0) {
continue; } else { $i } }
1
3
5
7
9

On a related note, if you want the current loop body to do something with
the next element in the list, you can use the $foreach variable which
contains the loop enumerator. This lets you do things as shown in the
following where we format pairs of numbers together:

PS (9) > foreach ($i in 1..10) { [void] $foreach.MoveNext() ; "({0},{1})" -f
$i, $foreach.Current }
(1,2)
(3,4)
(5,6)
(7,8)
(9,10)

There is also something similar in the switch statement. When iterating
through a collection of elements, $switch is bound to the list enumerator
allowing the clauses to access the next element in the clause. This would be
really useful for arg cracking if we didn't have the param() statrment in
scripts :-)

PS (1) > $list = "-a", 12, "-b", 13,"-c"
PS (2) > $a = $b = 0
PS (3) > $c = $false
PS (4) > "new: a=$a b=$b c=$c"
new: a=0 b=0 c=False
PS (5) > switch ($list)
>> {
>> "-a" { $a = $([void] $switch.MoveNext(); $switch.Current) }
>> "-b" { $b = $([void] $switch.MoveNext(); $switch.Current) }
>> "-c" { $c = $true }
>> }
>>
PS (6) > "new: a=$a b=$b c=$c"
new: a=12 b=13 c=True


-bruce

--
Bruce Payette [MSFT]
Windows PowerShell Technical Lead
Microsoft Corporation
This posting is provided "AS IS" with no warranties, and confers no rights.
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"Sung M Kim" <DontBotherMeWithSpam@gmail.com> wrote in message
news:1160516664.628059.88910@i42g2000cwa.googlegroups.com...
>
> MKielman wrote:
>> Hi, I am trying to figure out if there is a next function or something
>> similar that will allow me force a loop to go to the next iteration.
>> Please advise.
>>
>> Thanks,
>
> You can use "Continue" keyword
> Here is an example
>
> [^_^]PS[6]>for ($i = 0; $i -lt 10; $i++) { if (($i % 2) -eq 0) {
> continue; } else { $i } }
> 1
> 3
> 5
> 7
> 9
>

Thanks for the response but I don't quite understand.

Here is an example of what I am trying to do:

foreach ($a in $b) {

do something...
if ($? -eq 0) {
$foreach.movenext()
}
do more stuff...
}

I guess while I am at it, in perl there is the unless statement, is
there something like that in powershell? Or can I not the if statement?



Bruce Payette [MSFT] wrote:
> On a related note, if you want the current loop body to do something with
> the next element in the list, you can use the $foreach variable which
> contains the loop enumerator. This lets you do things as shown in the
> following where we format pairs of numbers together:
>
> PS (9) > foreach ($i in 1..10) { [void] $foreach.MoveNext() ; "({0},{1})" -f
> $i, $foreach.Current }
> (1,2)
> (3,4)
> (5,6)
> (7,8)
> (9,10)
>
> There is also something similar in the switch statement. When iterating
> through a collection of elements, $switch is bound to the list enumerator
> allowing the clauses to access the next element in the clause. This would be
> really useful for arg cracking if we didn't have the param() statrment in
> scripts :-)
>
> PS (1) > $list = "-a", 12, "-b", 13,"-c"
> PS (2) > $a = $b = 0
> PS (3) > $c = $false
> PS (4) > "new: a=$a b=$b c=$c"
> new: a=0 b=0 c=False
> PS (5) > switch ($list)
>>> {
>>> "-a" { $a = $([void] $switch.MoveNext(); $switch.Current) }
>>> "-b" { $b = $([void] $switch.MoveNext(); $switch.Current) }
>>> "-c" { $c = $true }
>>> }
>>>
> PS (6) > "new: a=$a b=$b c=$c"
> new: a=12 b=13 c=True
>
>
> -bruce
>

This does what you want... although Im not sure this is what your asking for

Code:
------
$b = 1,2,3,4,5,6

foreach ($a in $b) {
Write-Host "Hello: in checking $a"
if ($a -eq 3) {
#script code here
write-Host "$a is ok" }
else{
# if failed check... Skip
continue}
}


"MKielman" <mkielman@newsgroups.nospam> wrote in message
news:OZJyIQY7GHA.1492@TK2MSFTNGP02.phx.gbl...
> Thanks for the response but I don't quite understand.
>
> Here is an example of what I am trying to do:
>
> foreach ($a in $b) {
>
> do something...
> if ($? -eq 0) {
> $foreach.movenext()
> }
> do more stuff...
> }
>
> I guess while I am at it, in perl there is the unless statement, is there
> something like that in powershell? Or can I not the if statement?
>
>
>
> Bruce Payette [MSFT] wrote:
>> On a related note, if you want the current loop body to do something with
>> the next element in the list, you can use the $foreach variable which
>> contains the loop enumerator. This lets you do things as shown in the
>> following where we format pairs of numbers together:
>>
>> PS (9) > foreach ($i in 1..10) { [void] $foreach.MoveNext() ;
>> "({0},{1})" -f $i, $foreach.Current }
>> (1,2)
>> (3,4)
>> (5,6)
>> (7,8)
>> (9,10)
>>
>> There is also something similar in the switch statement. When iterating
>> through a collection of elements, $switch is bound to the list enumerator
>> allowing the clauses to access the next element in the clause. This would
>> be really useful for arg cracking if we didn't have the param() statrment
>> in scripts :-)
>>
>> PS (1) > $list = "-a", 12, "-b", 13,"-c"
>> PS (2) > $a = $b = 0
>> PS (3) > $c = $false
>> PS (4) > "new: a=$a b=$b c=$c"
>> new: a=0 b=0 c=False
>> PS (5) > switch ($list)
>>>> {
>>>> "-a" { $a = $([void] $switch.MoveNext(); $switch.Current) }
>>>> "-b" { $b = $([void] $switch.MoveNext(); $switch.Current) }
>>>> "-c" { $c = $true }
>>>> }
>>>>
>> PS (6) > "new: a=$a b=$b c=$c"
>> new: a=12 b=13 c=True
>>
>>
>> -bruce
>>