• Gary Miller (10/10) Mar 28 2014 If I need to examine a byte in string for a specific ASCII value
• bearophile (8/9) Mar 28 2014 enum char block = 219;
• monarch_dodra (8/18) Mar 28 2014 219 is not an "ASCII Block". You can just do a search for 219 in

"Gary Miller" <aiguy roadrunner.com> writes:

If I need to examine a byte in string for a specific ASCII value 
like

string MyString;

MyString = "Hello World"

and I want to check a position in the string for a certain 
unprintable ASCII value like the ASCII Block 219 what is the 
recommended method for doing so

if (MyString[0..1])== ???(219)) writeln("ASCII Block found")

I know there's and easy lib function or cast somewhere but 
everywhere I've looked it's not jumping out at me.

"bearophile" <bearophileHUGS lycos.com> writes:

Gary Miller:

 if (MyString[0..1])== ???(219)) writeln("ASCII Block found")

enum char block = 219;
...
if (myString[i] == block)
     "ASCII Block found".writeln;

Note that variable/function names in D start with a lower case.

Bye,
bearophile

"monarch_dodra" <monarchdodra gmail.com> writes:

On Friday, 28 March 2014 at 15:33:32 UTC, Gary Miller wrote:
 If I need to examine a byte in string for a specific ASCII 
 value like

 string MyString;

 MyString = "Hello World"

 and I want to check a position in the string for a certain 
 unprintable ASCII value like the ASCII Block 219 what is the 
 recommended method for doing so

 if (MyString[0..1])== ???(219)) writeln("ASCII Block found")

 I know there's and easy lib function or cast somewhere but 
 everywhere I've looked it's not jumping out at me.

219 is not an "ASCII Block". You can just do a search for 219 in 
your *byte* stream:

auto b = ("hello" ~ cast(char)219 ~ 
"world").representation.canFind(219);

The "representation" part *very* is important: Without it, you 
string will be interpreted as unicode, and there is *not* 
actually a 219 codepoint in there.