Comparing string to ascii val

[glenn]

Can anyone tell me in C# how to take a substr of a variable and compare it
to a literal ascii number.

ie:

if ( myvar.substr( 1,1 ) == 65 )
{
....
}

thanks,

glenn

 

[Chris, Master of All Things Insignificant]

One way:

if ( ASC(myvar.substr( 1,1 )) == 65 )
{
...
}

Chris

 

[Jon Skeet [C# MVP]]

Can anyone tell me in C# how to take a substr of a variable and compare it
to a literal ascii number.

ie:

if ( myvar.substr( 1,1 ) == 65 )
{
...
}

Is substr 1-based? If so:

if (myvar[0]=='A')
or
if (myvar[0]==65)

 

[Jon Skeet [C# MVP]]

One way:

if ( ASC(myvar.substr( 1,1 )) == 65 )
{
...
}

Except that isn't C#

 

[glenn]

Thanks guys. What about this, will this also work?

Convert.ToChar( myvar.substr( 1, 1) ) == 65

which is the best method? as far as the fastest executing?


thanks,

glenn

Can anyone tell me in C# how to take a substr of a variable and compare it
to a literal ascii number.

ie:

if ( myvar.substr( 1,1 ) == 65 )
{
...
}

Is substr 1-based? If so:

if (myvar[0]=='A')
or
if (myvar[0]==65)

 

[Chad Z. Hower aka Kudzu]

Thanks guys. What about this, will this also work?

Convert.ToChar( myvar.substr( 1, 1) ) == 65

which is the best method? as far as the fastest executing?

Offhand yes - but its very innefficient. Jon's method is much simpler and
thus faster.



--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programming is an art form that fights back"

Make your ASP.NET applications run faster
http://www.atozed.com/IntraWeb/

 

[Jon Skeet [C# MVP]]

Thanks guys. What about this, will this also work?

Convert.ToChar( myvar.substr( 1, 1) ) == 65

No, because there is no "substr" method. You can use Substring, but
that seems pretty pointless.

which is the best method? as far as the fastest executing?

Using the indexer is faster, but more importantly it's clearer. Chances
are it's not going to be the bottleneck anyway.

 

[glenn]

Thanks...

glenn

Can anyone tell me in C# how to take a substr of a variable and compare it
to a literal ascii number.

ie:

if ( myvar.substr( 1,1 ) == 65 )
{
...
}

Is substr 1-based? If so:

if (myvar[0]=='A')
or
if (myvar[0]==65)