How to zero-pad a number?

[Richard Deeming]

PIEBALDconsult wrote:

Yes, and are they?

Yes, the first operand is a string. It's the result of the ternary operator:

fileCount <= 999
? fileCount <= 99
? fileCount <= 9
? "000"
: "00"
: "0"
: ""

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"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

[PIEBALDconsult]

And the second?

[SortaCore]

I think I wrote it in one of those points in the week where I just couldn't think. X| Methinks I'll replace it tomorrow.

[Richard Deeming]

PIEBALDconsult wrote:

And the second?

Doesn't matter. The documentation clearly states, "When one or both operands are of type string...", so the type of the other operand is irrelevant.

---

"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

[Big Daddy Farang]

I missed that the first time also. :)

BDF The internet makes dumb people dumber and clever people cleverer. -- PaulowniaK

[PIEBALDconsult]

Where do you see that in the documentation? I don't even see + in the documentation. And what idiot thought that was a good idea? :wtf: Time to find a new language; this one's becoming VB. X| Edit: I finally found it; it's not documented with String; what a POS. :thumbsdown: I'm fairly sure that no self-respecting C# professional uses it that way.

[Richard Deeming]

It's the link that I posted in my previous message: http://msdn.microsoft.com/en-GB/library/k1a63xkz.aspx[^]

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"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

[SortaCore]

PIEBALDconsult wrote:

I'm fairly sure that no self-respecting C# professional uses it that way.

Heh, I go for the shorter version. If it doesn't make sense with a mishmash of ints/strings I use brackets or ToString(). Like for:

int i = 124, j = 253;
string s = "JD" + i + j; // Could be two things and no one wants to look up operator precedence, so instead...
string t = "JD" + (i + j);

But yeah, usually I don't bother. Although, theoretically, I could now do

string s = 0; // won't initialise
string t = "" + 0; // will work fine O.o

So, let's get back to self-respecting... :rolleyes:

[SortaCore]

PIEBALDconsult wrote:

I'm fairly sure that no self-respecting C# professional uses it that way.

Heh, I go for the shorter version. If it doesn't make sense with a mishmash of ints/strings I use brackets or ToString() to clarify.

int i = 124, j = 253;
string s = "JD" + i + j; // Could be two things and no one wants to look up operator precedence, so instead...
string t = "JD" + (i + j);

But yeah, usually I don't bother. Although, theoretically, I could now do

string s = 0; // won't initialise
string t = "" + 0; // will work fine O.o

So, let's get back to self-respecting... :rolleyes:

[PIEBALDconsult]

string t = System.String.Format ( "JD{0}" , i + j ) ;

[Richard Deeming]

Make that:

string t = string.Format(CultureInfo.InvariantCulture, "JD{0:D}", i + j);

You typically don't want culture-specific formatting or group separators in the result.

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"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

[PIEBALDconsult]

I've never had that problem.

[SortaCore]

And of course don't forget to set the string to "" at the end, else if the garbage collector is a little slow you might run out of memory! Better yet, just keep re-using global strings.

[Dennis_E]

Wonderful code! When I was new to programming I used to do something like this too. Then I figured out a trick: just add 1.000.000.000 to the number and take the last 4 characters. Now I just use PadLeft, PadRight or Format