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John B.
Joined: 21 Oct 2006
Posts: 21
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 Posted: Mon Nov 26, 2007 2:22 pm Post subject: Append next line in a parsing loop |
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Hi,
I've read a file into a variable (CurrentFile), and am using a parsing loop to process each line of the file. As part of the processing, I want to append the next line from CurrentFile to the current line, without using Continue to jump back to the top of the parsing loop.
| Code: | Loop, parse, CurrentFile, `n
{
step 1
step 2
...
step n
append the next line in CurrentFile to the current line (Line`nNextLine)
process the combined lines
step n+1
...
}
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I want the next iteration of the parsing loop to start on the line after the one I appended.
I haven't found any way to get the current position of the parsing loop, so I don't know how to tell it to get the next line and append it to the current line. Is there an easy way to do this inside a parsing loop?
Thanks,
John B. |
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wOxxOm
Joined: 09 Feb 2006
Posts: 326
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| Posted: Mon Nov 26, 2007 3:03 pm Post subject: |
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maybe | Code: | bJoin=
loop, parse, CurrentFile,`r,`n
{
IfNotEqual,bJoin,
{ bJoin=
CurLine=%CurLine%`n%A_LoopField%
}
;.........
if (NeedToJoin)
{ bJoin=1
CurLine=%A_LoopField%
continue
}
;Process CurLine instead of A_LoopField
;........
} |
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John B.
Joined: 21 Oct 2006
Posts: 21
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| Posted: Mon Nov 26, 2007 3:21 pm Post subject: |
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Hi wOxxOm,
That's what I originally considered, but it has to be done without using "Continue".
Is there any way to access and increment the index/pointer in a parsing loop? If not, then maybe reading the lines into an AHK pseudo-array is the answer?
Thanks,
John B. |
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wOxxOm
Joined: 09 Feb 2006
Posts: 326
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| Posted: Mon Nov 26, 2007 3:29 pm Post subject: |
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| no, there isn't. What's wrong with continue? |
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John B.
Joined: 21 Oct 2006
Posts: 21
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| Posted: Mon Nov 26, 2007 3:40 pm Post subject: |
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x0xx0m wrote:
| Quote: | | no, there isn't. What's wrong with continue? |
The test for needing to append the next line comes in the middle of the processing (as shown in the original post).
1. After appending the next line, I want to keep processing the combined line down to the end of the loop. There are a number of steps after the append.
2. I don't want to process the combined line with the part of the loop above the text step where I append the next line. If I use a continue, the processing jumps back to the beginning of the loop.
Thanks,
John B. |
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wOxxOm
Joined: 09 Feb 2006
Posts: 326
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| Posted: Mon Nov 26, 2007 3:56 pm Post subject: |
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just add 'else' part with parentheses
| Code: |
bJoin=
loop, parse, CurrentFile,`r,`n
{
IfNotEqual,bJoin,
{ bJoin=
CurLine=%CurLine%`n%A_LoopField%
}
else
{
;.........
if (NeedToJoin)
{ bJoin=1
CurLine=%A_LoopField%
continue
}
}
;Process CurLine instead of A_LoopField
;........
} |
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John B.
Joined: 21 Oct 2006
Posts: 21
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| Posted: Mon Nov 26, 2007 4:16 pm Post subject: |
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So it would look like this?
| Code: |
bjoin = false
Loop, parse, CurrentFile, `n
{
If bjoin = false
{
step 1
step 2
...
step n ; test for need to join
If need to join
{
bJoin=true
CurLine=%A_LoopField%
continue
}
}
step n+1
...
bjoin = false
}
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I think this would work if I had only one instance of needing to join lines, but there are multiple instances, and in each case, I'd have to add another if condition for bjoin1, bjoin2, bjoin3, bjoin4.... It rapidly gets unmanageable. So again, I'm looking for a method that doesn't use "continue".
Thanks,
John B. |
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[VxE]
Joined: 07 Oct 2006
Posts: 3254
Location: Simi Valley, CA
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| Posted: Mon Nov 26, 2007 8:27 pm Post subject: |
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just a thought, but have you considered using [StringSplit] on your input file and having a normal [loop] iterate through the array elements ?
With that method, you'd have more control over which element gets accessed next.
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John B.
Joined: 21 Oct 2006
Posts: 21
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| Posted: Mon Nov 26, 2007 8:50 pm Post subject: |
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Hi [VxE],
Yes, I thought about using an array for just that reason, although I was going to use a loop to build the array. If I go with the array, your suggestion of using StringSplit to create the array seems the easiest way.
Thanks,
John B. |
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engunneer
Joined: 30 Aug 2005
Posts: 8255
Location: Maywood, IL
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| Posted: Mon Nov 26, 2007 10:02 pm Post subject: |
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a stringsplit and a loop of the stringsplit results is the same as a loop, parse.
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John B.
Joined: 21 Oct 2006
Posts: 21
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| Posted: Tue Nov 27, 2007 12:27 am Post subject: |
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Hi engunneer,
You wrote:
| Quote: | | a stringsplit and a loop of the stringsplit results is the same as a loop, parse. |
The difference, I'm hoping, is that a stringsplit results in an "array", which would allow me to address individual lines (so I can append the next line to the current line and increment the array index without using "continue"). If I use loop, parse, I haven't found any way to append the next line to the current line without iterating through the loop again.
Right?
Thanks,
John B. |
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engunneer
Joined: 30 Aug 2005
Posts: 8255
Location: Maywood, IL
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| Posted: Tue Nov 27, 2007 12:29 am Post subject: |
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you are correct. I didn't read closely enough
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