Stringscanner

[Citadel]

Hi All

This code runs but the value of txt doesn't seem to update, even though the value of LineText does. Is it obvious why not? What am I doing wrong?

dim scanner as P
dim txt as C
dim LineText as C
txt = "Line 1" + crlf() + "Line 2" + crlf() + "Line 3" + crlf() + "Line 4" + crlf() + "Line 5"
ui_msg_box("Value of txt",txt)
scanner = stringscanner.create(txt)
scanner.GotoLineStart(4)
LineText = scanner.GetLineText()
ui_msg_box("Value of LineText",LineText)
scanner.GotoLineStart()
scanner.ReplaceString("Line 4","This is a new line of info")
scanner.GotoLineStart(4)
LineText = scanner.GetLineText()
ui_msg_box("Value of LineText?",LineText)
ui_msg_box("Value of txt?",txt)

Many thanks.

[Stan Mathews]

Re: Stringscanner

The value of txt is assigned in this line.

txt = "Line 1" + crlf() + "Line 2" + crlf() + "Line 3" + crlf() + "Line 4" + crlf

Where did you plan to change it?

[Citadel]

Re: Stringscanner

Yes, I did realise that txt hadn't been explicitly saved.

In the absence of an explicit way to save the contents of the buffer, like, say, stringscanner.save(), I have had to set the offset to the beginning of the buffer and read the buffer to the end using
txt=scanner.getremainer(). Any other suggestions welcome.

[csda1]

Re: Stringscanner

Hi Alan,

Any other suggestions welcome.

As far as I know, stringscanner is not used by Alpha 5 internally at all. I believe it is old technology kept for compatibility to older versions.

I never found it an advantage over other Alpha functions. For key functions that are fast, see my list in this thread.

[Tim Kiebert]

Re: Stringscanner

Yes, I did realise that txt hadn't been explicitly saved.

In the absence of an explicit way to save the contents of the buffer, like, say, stringscanner.save(), I have had to set the offset to the beginning of the buffer and read the buffer to the end using
txt=scanner.getremainer(). Any other suggestions welcome.

The scanner object has two properties. They are mentioned right at the top of the help page above the list of Methods. They are offset and text. I was doing the same as you for ages before I opened my eyes and tripped over the obvious. :)

So txt = scanner.text will do it.
Or ui_msg_box("Value of txt?",scanner.text)

Ira,

I suppose v7 is now considered an old version but the stringscanner object was not introduced till then.

[csda1]

Re: Stringscanner

Hi Tim,

I suppose v7 is now considered an old version but the stringscanner object was not introduced till then.

Actually, it's in version 6 as well. It may have not been documented though.

[Tim Kiebert]

Re: Stringscanner

Ok a little bit older. But atleast still in this millenium.

I have used it a bit and have not been disappointed with its speed. Admittedly, I have not run it through your wizbang speed figure outerer. ;) But one of these days I will.