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C#: What's an efficient way of parsing a string with one delimiter through ReadLine() of TextReader?


C#: What's an efficient way of parsing a string with one delimiter through ReadLine() of TextReader?

By : user3851782
Date : October 15 2020, 11:12 PM
like below fixes the issue C#: What's an efficient way to parse a string with one delimiter for each ReadLine() of TextReader? , You could split them this way:
code :


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TextReader.ReadLine returns incomplete lines

TextReader.ReadLine returns incomplete lines


By : EuVid
Date : March 29 2020, 07:55 AM
it fixes the issue I decided to write my own ReadLine parser-ish kinda thing. Here's the code:
code :
// Async callback.
Message message;

while((message = Message.ReadBytes(messageBuffer)) != null)
{
    OnMessageReceived(new MessageEventArgs(message));
}

// Message class.
public static Message ReadBytes(List<byte> data)
{
    int end = data.FindIndex(b => b == '\n' || b == '\r');

    if(end == -1)
        return null;

    string line = Encoding.UTF8.GetString(data.Take(end).ToArray());

    data.RemoveRange(0, end + 1);

    if(line == "")
        return ReadBytes(data);

    if(line == null)
        return null;

    return Message.FromRawString(line);
}
How do I count the number of bytes read by TextReader.ReadLine()?

How do I count the number of bytes read by TextReader.ReadLine()?


By : user2036715
Date : March 29 2020, 07:55 AM
I hope this helps . Getting the current position of the underlying stream won't help, since the StreamReader will buffer data read from the stream.
Essentially you can't do this without writing your own StreamReader. But do you really need to?
Is parsing a language with an ending delimiter (e.g. ';') more efficient than having none?

Is parsing a language with an ending delimiter (e.g. ';') more efficient than having none?


By : user2622369
Date : March 29 2020, 07:55 AM
may help you . Any difference is going to be trivial. This is because a language that doesn't use such end delimiters, do infact have them in the form of newline characters!! These will then use special characters to mark that teh statement continues on to the next line.
A few do neither, but there, the end of the statement is implicit in the definition - eg. the close ')' at the end of a parameter list. If there's a comma (or nothing) then more parameters or a closed ')' will be expected on the next line.
TextReader.ReadLine() Fails to Read Entire Line

TextReader.ReadLine() Fails to Read Entire Line


By : user3481045
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Since it turned out to be particularly helpful...
Have you checked what character(s) there are between the period and doublequote character at the point where it's splitting the line?
Most efficient way to split a string up by a delimiter while ignoring certain instances of said delimiter using excel vb

Most efficient way to split a string up by a delimiter while ignoring certain instances of said delimiter using excel vb


By : Schele
Date : March 29 2020, 07:55 AM
With these it helps Regular Expressions (aka "regex") are indeed scary-looking, but they're also a powerful tool, and VBA supports them, if you add a reference to the Microsoft VBScript Regular Expressions 5.5 library.
With it you can create a RegExp object, which gives you a MatchCollection, which is, well, a collection of Match objects.
code :
Sub Test()
    Const value As String = _
    "Available on 2 sides: Silkscreen,[full: color, covers entire face],Pad Print: One color,[heat transfer, may bleed]"

    Const pattern As String = _
    "(\[[^\]]+\]|[^,]+)"

    Dim regex As New RegExp
    regex.Global = True
    regex.pattern = pattern

    Dim matches As MatchCollection
    Set matches = regex.Execute(value)

    Dim m As Match
    For Each m In matches
        Debug.Print Trim(m.value) 'value will preserve any leading/trailing spaces
    Next

End Sub
(\[[^\]]+\]|[^,]+)
Available on 2 sides: Silkscreen
[full: color, covers entire face]
Pad Print: One color
[heat transfer, may bleed]
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