goto... Who uses it?

DanielSheets

This isn't a programming question. Anyway... I find it useful in very few situations. It can make for cleaner code if used correctly. Of course, it can also be over used.

OriginalGriff

DanielSheets wrote:

This isn't a programming question.

DanielSheets wrote:

t can make for cleaner code if used correctly

How can it not be?

If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.

Maximilien

I've not used it in a long time. There are a few of them in our legacy code, but no new code have them; they are mostly used for quick exit of a function to do cleanup.

Nihil obstat

Keith Barrow

I can't ever remember needing it in c#. That said, it's been so long I doubt I'd spot a place where it might make things better.

Sort of a cross between Lawrence of Arabia and Dilbert.[^]
-Or-
A Dead ringer for Kate Winslett[^]

Lost User

DanielSheets wrote:

It can make for cleaner code if used correctly.

Your definition of "cleaner code" is quite odd then. There is no "correct" usage of it in modern high level languages. It simply creates an unmaintainable ball of string.

Computers have been intelligent for a long time now. It just so happens that the program writers are about as effective as a room full of monkeys trying to crank out a copy of Hamlet.

Lost User

DanielSheets wrote:

I find it useful

I am not ashamed to admit that I use it all the time. I goto the store I goto the bar I goto the office. Many other uses too :-)

Andrew Torrance

If we are talking of C# then I cant think of a time I would ever use it , although I am somewhat biased as I have told everyone in my team that I would slaughter a family member if I ever found it in any code .

Chris Maunder

In SQL - fairly often to jump to the error handler at the end of our sprocs. I'll admit there's no good reason we do this, since it's easy enough for us to avoid this with if statements, but it's a pattern used in our original code and so for consistency we stuck with it:

Create Procedure MyProc as

Begin Tran

-- Do stuff...

if @@error <> 0 goto errorHandler

Commit Tran
Return 0

errorHandler:
Rollback Tran
Return 1

cheers, Chris Maunder The Code Project | Co-founder Microsoft C++ MVP

Lost User

Who uses it?

N00bs.

DanielSheets wrote:

It can make for cleaner code if used correctly.

Do you have an example? After years in the trade, I have still to see the first instance where it actually improves readability/maintainability.

Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^]

Bergholt Stuttley Johnson

burn the heretic

You cant outrun the world, but there is no harm in getting a head start Real stupidity beats artificial intelligence every time.

dusty_dex

Not without being forced to. Futzing around with an old 8-bit BASIC - ATARI. It was a shockingly poor implementation of the language. Otherwise I can't recall using goto in any C-like language at all. ever!

Q. Hey man! have you sorted out the finite soup machine? A. Why yes, it's celery or tomato.

BobJanova

Isyourspacebarfaulty? 'Go to' is two words.

BobJanova

I don't use it in high level languages where there is a structured alternative. The only time I'm tempted is the 'double break', i.e. wanting to escape from two levels of nested looping; to do this you have to create a method to do the double loop and use return, which often feels like overkill.

Dalek Dave

I have used it for some lazy error handling.

--------------------------------- I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave CCC Link[^]

DanielSheets

    public static void SaveChartData(List dataList)
    {
        int totalDelays = 0;
        int value = 0;
        string errorString = "";
        // Use a temporary file in case there are any parse errors.
        string tmpFilePath = applicationPath + "TmpChartData.csv";
        using (StreamWriter sw = new StreamWriter(tmpFilePath))
        {
            foreach (DataGridClass dgc in dataList)
            {
                if (!int.TryParse((dgc.MATL.Equals("") ? "0" : dgc.MATL), out value))
                {
                    errorString = dgc.MATL;
                    goto ParseError;
                }
                totalDelays += value;
                if (!int.TryParse((dgc.EQUIP.Equals("") ? "0" : dgc.EQUIP), out value))
                {
                    errorString = dgc.EQUIP;
                    goto ParseError;
                }
                totalDelays += value;
                if (!int.TryParse((dgc.People.Equals("") ? "0" : dgc.People), out value))
                {
                    errorString = dgc.People;
                    goto ParseError;
                }
                totalDelays += value;
                if (!int.TryParse((dgc.Defects.Equals("") ? "0" : dgc.Defects), out value))
                {
                    errorString = dgc.Defects;
                    goto ParseError;
                }
                totalDelays += value;
                if (!int.TryParse((dgc.Other.Equals("") ? "0" : dgc.Other), out value))
                {
                    errorString = dgc.Other;
                    goto ParseError;
                }
                totalDelays += value;
                sw.WriteLine("{0},{1},{2},{3},{4},{5},{6},{7},{8},{9},{10}",
                    dgc.Year, dgc.Month, dgc.Goal, dgc.Completions, totalDelays, dgc.to,
                    dgc.MATL, dgc.EQUIP, dgc.People, dgc.Defects, dgc.Other);

                totalDelays = 0;
                value = 0;
            }
        }
        // If we got this far then there were no parse errors.
        File.Copy(tmpFilePath, chartData, true);
        return;
    ParseError:
        string msg = string.Format("Unable to parse data. Verify its entered correctly.\\r\\nValue = {0}", errorString);
        MessageBox.Sho

Mauro Leggieri

Eddy Vluggen wrote:

Do you have an example? After years in the trade, I have still to see the first instance where it actually improves readability/maintainability.

Hi, In C/C++ for e.g. in a switch statement where you must share some portion of code. Although one can put that shared part inside another function, for visibility & tracking purposes, some times is better to have the code in the same screen avoiding scrolling up and down to follow the code. Believe it, is real but I cannot show company code. I don't remember which old Pascal guru told that but sometimes a goto is preferable instead of doing a lot of work to avoid its usage and make the code difficult to read. For the other side, as an assembly programmer... I see JMPs everywhere hehehe. Regards, Mauro.

Lost User

Read up on exception-handling.

Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^]

DanielSheets

Its all relative I suppose.

Lost User

Mauro Leggieri wrote:

For the other side, as an assembly programmer... I see JMPs everywhere hehehe.

..simply because there's little alternative in assembly. Assumed we weren't talking about assembly, but higher-level languages - there are few people still working professionally with assembly.

Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^]

DanielSheets

For what part? Why would I need to use exception handling when thats exactly what TryParse is used for (assuming thats what you're talking about)?