• Kris (9/9) Apr 01 2004 to support foreach() on a class, one implements the opApply() method wit...
• Matthew (7/15) Apr 02 2004 How
• Kris (9/26) Apr 02 2004 Cheers Matthew; that's just what I ended up doing -- adding little facto...
• Matthew (6/36) Apr 02 2004 Cool. I'd like to see them when you're comfortable to share. :)
• Kris (9/50) Apr 02 2004 Certainly. This particular one was related to the traversal of HTTP head...

"Kris" <someidiot earthlink.dot.dot.dot.net> writes:

to support foreach() on a class, one implements the opApply() method with
the signature: int opApply (int delegate(inout Type) dg)

This is for iterating across all elements within the class (container). How
does one specify an opApply() that is capable of filtering which elements it
exposes?

For example: if I have a directory of names versus phone-numbers, how do I
set up foreach() and opApply() to return only those elements that match a
given surname?

- Kris

"Matthew" <matthew stlsoft.org> writes:

"Kris" <someidiot earthlink.dot.dot.dot.net> wrote in message
news:c4in3o$2a00$1 digitaldaemon.com...
 to support foreach() on a class, one implements the opApply() method with
 the signature: int opApply (int delegate(inout Type) dg)

 This is for iterating across all elements within the class (container).

How
 does one specify an opApply() that is capable of filtering which elements

it
 exposes?

 For example: if I have a directory of names versus phone-numbers, how do I
 set up foreach() and opApply() to return only those elements that match a
 given surname?

You don't. Instead, you'd have a method - filter(char[] surname) - that
returns something that is itself freachable, and which applies your
filtering to the sequence provided by the directory's freachable range.

"Kris" <someidiot earthlink.dot.dot.dot.net> writes:

Cheers Matthew; that's just what I ended up doing -- adding little factory
methods for creating filtering freachables.

- Kris


"Matthew" <matthew stlsoft.org> wrote in message
news:c4j8ob$6df$1 digitaldaemon.com...
 "Kris" <someidiot earthlink.dot.dot.dot.net> wrote in message
 news:c4in3o$2a00$1 digitaldaemon.com...
 to support foreach() on a class, one implements the opApply() method


with
 the signature: int opApply (int delegate(inout Type) dg)

 This is for iterating across all elements within the class (container).

 How
 does one specify an opApply() that is capable of filtering which


elements
 it
 exposes?

 For example: if I have a directory of names versus phone-numbers, how do


I
 set up foreach() and opApply() to return only those elements that match


a
 given surname?

 You don't. Instead, you'd have a method - filter(char[] surname) - that
 returns something that is itself freachable, and which applies your
 filtering to the sequence provided by the directory's freachable range.

"Matthew" <matthew stlsoft.org> writes:

Cool. I'd like to see them when you're comfortable to share. :)

"Kris" <someidiot earthlink.dot.dot.dot.net> wrote in message
news:c4jcgu$cpa$1 digitaldaemon.com...
 Cheers Matthew; that's just what I ended up doing -- adding little factory
 methods for creating filtering freachables.

 - Kris


 "Matthew" <matthew stlsoft.org> wrote in message
 news:c4j8ob$6df$1 digitaldaemon.com...
 "Kris" <someidiot earthlink.dot.dot.dot.net> wrote in message
 news:c4in3o$2a00$1 digitaldaemon.com...
 to support foreach() on a class, one implements the opApply() method


 with
 the signature: int opApply (int delegate(inout Type) dg)

 This is for iterating across all elements within the class



(container).
 How
 does one specify an opApply() that is capable of filtering which


 elements
 it
 exposes?

 For example: if I have a directory of names versus phone-numbers, how



do
 I
 set up foreach() and opApply() to return only those elements that



match
 a
 given surname?

 You don't. Instead, you'd have a method - filter(char[] surname) - that
 returns something that is itself freachable, and which applies your
 filtering to the sequence provided by the directory's freachable range.

"Kris" <someidiot earthlink.dot.dot.dot.net> writes:

Certainly. This particular one was related to the traversal of HTTP headers
in the Dsc package.

- Kris

"Matthew" <matthew stlsoft.org> wrote in message
news:c4juoc$18se$1 digitaldaemon.com...
 Cool. I'd like to see them when you're comfortable to share. :)

 "Kris" <someidiot earthlink.dot.dot.dot.net> wrote in message
 news:c4jcgu$cpa$1 digitaldaemon.com...
 Cheers Matthew; that's just what I ended up doing -- adding little


factory
 methods for creating filtering freachables.

 - Kris


 "Matthew" <matthew stlsoft.org> wrote in message
 news:c4j8ob$6df$1 digitaldaemon.com...
 "Kris" <someidiot earthlink.dot.dot.dot.net> wrote in message
 news:c4in3o$2a00$1 digitaldaemon.com...
 to support foreach() on a class, one implements the opApply() method


 with
 the signature: int opApply (int delegate(inout Type) dg)

 This is for iterating across all elements within the class



 (container).
 How
 does one specify an opApply() that is capable of filtering which


 elements
 it
 exposes?

 For example: if I have a directory of names versus phone-numbers,




how
 do
 I
 set up foreach() and opApply() to return only those elements that



 match
 a
 given surname?

 You don't. Instead, you'd have a method - filter(char[] surname) -



that
 returns something that is itself freachable, and which applies your
 filtering to the sequence provided by the directory's freachable



range.