I have a CPP file. I am using VB in VS2005. I have opened that file using the FileSystemObject. I am reading each and every line in that CPP file. I have to comment all the lines until I encounter a return statement. I am using the scripting.textstream to read a line from the CPP file. But I have no idea as to how we can add a // comment to the beginning of every line that I read or even a multiline comment from the beginning till a return statement. Please help.
You seem to be using the FileSystemObject of the Windows script runtime instead of the System.IO.File class's methods. Strange!
The static System.IO.File.ReadAllLines() will read a file (and close it) and return a string array containing all the lines. You could then iterate through the array and add a comment to each line (except if the line starts with return).
Finally, save the changed text to the file using any of the WriteAllLines() method, thus overwriting any contained text.
Adding a multiline comment at the start would be even easier, you would not need to read the lines into an array.
Related
I am trying to read a text file from my applications resources. For each line in this text file I want to split the text before and after the comma.
Each line in txt file looks like this:
-125.325235,4845636
My issue is that the function loops and does not end constantly repeating the for each statement
For Each Line As String In My.Resources.CompanyBases
MsgBox(My.Resources.CompanyBases.Split(","c).First)
MsgBox(My.Resources.CompanyBases.Split(","c).Last)
Next
Firstly, don't ever get a resource over and over like that. Those properties are not "live". Every time you get the property, the resource has to be extracted from your assembly. If you need to use the value multiple times, get the property once and assign it to a variable, then use that variable over and over.
Secondly, you're not getting a file. The whole point of resources is that they are not distinct files but rather data compiled into your assembly. It's just a String like any other. How would you usually split a String on line breaks?
Finally, you have a For Each loop with a loop control variable Line, yet you never use that variable inside the loop. It should be Line that you're splitting inside the loop, not the resource property containing all the lines.
For Each line In My.Resources.CompanyBases.Split({Environment.NewLine}, StringSplitOptions.None)
Dim fields = line.Split(","c)
Debug.WriteLine(fields(0))
Debug.WriteLine(fields(1))
Next
Note that, if you're using .NET Core, Split will accept a String as well as a String array.
Everytime i try to copy and paste something on my Pycharm editor it all paste it in single line. How to automatically paste in multiline?[1]
This is what i copied.....
[{"DateObserved":"2020-06-12 ","HourObserved":23,"LocalTimeZone":"EST","ReportingArea":"Central New York Region","StateCode":"NY","Latitude":42.8049,"Longitude":-76.3589,"ParameterName":"O3","AQI":35,"Category":{"Number":1,"Name":"Good"}},{"DateObserved":"2020-06-12 ","HourObserved":23,"LocalTimeZone":"EST","ReportingArea":"Central New York Region","StateCode":"NY","Latitude":42.8049,"Longitude":-76.3589,"ParameterName":"PM2.5","AQI":0,"Category":{"Number":1,"Name":"Good"}}]
and this all got pasted in a single line on my Pycharm editor. can anybody help with that, its pretty hard to read all this info on a single line?
It seems like you didn't copy anything containing newlines as you can see better after my edit (See the side-by-side-markdown diff so you can see that I didn't remove any line breaks).
If you just copy everything as a single line, PyCharm won't be able to split it into multiple lines (except with auto-format maybe).
As you haven't said how you copied the input, I can't say what exactly is wrong.
However, it seems like you copied something from a program that didn't display the text correctly so that you couldn't copy it correctly.
Another possibility is that the IDE interprets line breaks differently.
For example, windows uses CRLF(carriage return+line feed) as a line seperator while linux uses LF only.
If your file contains only LF line breaks and PyCharm is configured to use CRLF like breaks, it is possible that it ignores them because of that.
You can change that behaviour at the bottom of your file in PyCharm (button with CR/CRLF/LF).
Stack!
I'm currently trying to code a neat little function in Visual Basic that deletes my entire file system for my program depending on the contents of one text file.
If my text file contains the number 0 by itself, my file system will be deleted. If it contains a 1 by itself, it will not delete the file system and carry on with its pathway of execution.
the problem I'm having is reading the file, then assigning the text file's contents to a variable (string), which then is used in an if statement to decide whether it deletes (then immediately recreates) the file system, or keeps it. Ideally I'd be using this primarily for when the user installs. By default, it is set to 0 so that it clears any stored content, then after creating my directory, the number turns to 1 so that it does not reset my programs content directory.
Here's my code. The first line is giving me difficulties -
Could not find file 'C:\Users\110fa_000\documents\visual studio 2013\Projects\Novation_Launchpad_Emulator\Novation_Launchpad_Emulator\bin\Debug\0'.
fileReader = File.ReadAllText(My.Resources.FirstTimeUse)
If fileReader = "0" Then
FirstTimeUse = True
End If
If you can help me, that'd be absolutely brilliant. I don't think there's any more information I can give sadly, but everything regarding the function, purpose, and error is there.
How can I append text to the end a line in a text file with lines already there in VB.NET?
For example my text file looks like this:
header1,header2,header3
value1,value2,value3
stuff1,stuff2,stuff3
and I want to add new text to the end of each line so it looks like this:
header1,header2,header3,newheader
value1,value2,value3,newvalue
stuff1,stuff2,stuff3,newstuff
I know that in Perl you can point to the line and then act on it, is there some VB.net way to do this?
If the file isn't too big, the simplest is, probably, to use the IO.File.ReadAllLines method to read the file into memory and modify the data and write it back with the WriteAllLines method.
For very large files you're probably looking at reading each line modifying it and writing it to a different file.
I have a large file which i am writing to a smaller file in VB, i just dont know how to select lines from an input file that i opened.
I would like to keep the first 12 lines of the large file and them copy every 3rd line into the new output.
Any help?!
You can do this with a StreamReader - just open one on the file, then you can call ReadLine() on it as many times as you need.
Easiest implementation would probably be a 0-to-11 (or 1-to-12) For loop, then a While where you read 2 and ignore them, then read the 3rd and write it.
Writing the new file can be done with StreamWriter, which just has a WriteLine() method to write the text.
The StreamReader and StreamWriter are generally the easiest ways to read and write text files.