• jicman (7/7) Jan 28 2008 Greetings.
• Bjoern (20/33) Jan 28 2008 To clear an AA
• Steven Schveighoffer (5/15) Jan 28 2008 How about
• Bill Baxter (3/30) Jan 28 2008 I think =null works for both too.
• jicman (3/28) Jan 28 2008 Thanks Steve. This one worked.
• Bill Baxter (6/33) Jan 29 2008 Are you implying that
• Steven Schveighoffer (4/37) Jan 31 2008 Ha ha! jicman liked my idea better. Jealous much?
• bearophile (15/17) Jan 31 2008 Try this:
• jicman (2/35) Feb 01 2008 No, I just tried the .init and it worked and that is what I wanted. .-)

jicman <cabrera_ _wrc.xerox.com> writes:

Greetings.

Long time no write. :-)

I know that I can get the keys of an Associative array and do a foreach loop
and remove the keys of the array, but is there an easier and quicker way?  I
know that I can set any non-Associative array to [], ie,

myArr = [];

and that is sufficient or set the length to 0; but how about the Associative
arrays?  Is there a quick way of doing this?

thanks,

josé

Bjoern <nanali nospam-wanadoo.fr> writes:

jicman schrieb:
 Greetings.
 
 Long time no write. :-)
 
 I know that I can get the keys of an Associative array and do a foreach loop
and remove the keys of the array, but is there an easier and quicker way?  I
know that I can set any non-Associative array to [], ie,
 
 myArr = [];
 
 and that is sufficient or set the length to 0; but how about the Associative
arrays?  Is there a quick way of doing this?
 
 thanks,
 
 josé

To clear an AA
// some Associative Array properties
bool hasData(T,E)(T[E] aa) { return aa.length > 0; }

// by Ben Hinkle
private struct BB { void*[]b; size_t nodes; }

private union ToPtr(T) {T x; void * ptr; }

void clear(T,E)(T[E] aa) {
     ToPtr!(typeof(aa)) toptr;
     toptr.x = aa;
     BB* b = cast(BB*) toptr.ptr;
     if (b) {
         b.b = null;
         b.nodes = 0;
     }
}

aa.clear()
//D 1.x
If you mean, clearing just the keys, sorry dunno
Bjoern

"Steven Schveighoffer" <schveiguy yahoo.com> writes:

"jicman" wrote
 Greetings.

 Long time no write. :-)

 I know that I can get the keys of an Associative array and do a foreach 
 loop and remove the keys of the array, but is there an easier and quicker 
 way?  I know that I can set any non-Associative array to [], ie,

 myArr = [];

 and that is sufficient or set the length to 0; but how about the 
 Associative arrays?  Is there a quick way of doing this?

 thanks,

 josé

How about

myArr = myArr.init;

Works for both associative and standard arrays

-Steve 

Bill Baxter <dnewsgroup billbaxter.com> writes:

Steven Schveighoffer wrote:
 "jicman" wrote
 Greetings.

 Long time no write. :-)

 I know that I can get the keys of an Associative array and do a foreach 
 loop and remove the keys of the array, but is there an easier and quicker 
 way?  I know that I can set any non-Associative array to [], ie,

 myArr = [];

 and that is sufficient or set the length to 0; but how about the 
 Associative arrays?  Is there a quick way of doing this?

 thanks,

 josé

 
 How about
 
 myArr = myArr.init;
 
 Works for both associative and standard arrays
 
 -Steve 
 
 

I think =null works for both too.

--bb

jicman <cabrera_ _wrc.xerox.com> writes:

Steven Schveighoffer Wrote:

 "jicman" wrote
 Greetings.

 Long time no write. :-)

 I know that I can get the keys of an Associative array and do a foreach 
 loop and remove the keys of the array, but is there an easier and quicker 
 way?  I know that I can set any non-Associative array to [], ie,

 myArr = [];

 and that is sufficient or set the length to 0; but how about the 
 Associative arrays?  Is there a quick way of doing this?

 thanks,

 josé

 
 How about
 
 myArr = myArr.init;
 
 Works for both associative and standard arrays
 

Thanks Steve.  This one worked.

josé

Bill Baxter <dnewsgroup billbaxter.com> writes:

jicman wrote:
 Steven Schveighoffer Wrote:
 
 "jicman" wrote
 Greetings.

 Long time no write. :-)

 I know that I can get the keys of an Associative array and do a foreach 
 loop and remove the keys of the array, but is there an easier and quicker 
 way?  I know that I can set any non-Associative array to [], ie,

 myArr = [];

 and that is sufficient or set the length to 0; but how about the 
 Associative arrays?  Is there a quick way of doing this?

 thanks,

 josé

 How about

 myArr = myArr.init;

 Works for both associative and standard arrays

 
 Thanks Steve.  This one worked.

Are you implying that
    myArr=null;
did not work?  because it should.  And it's less typing.  And avoids you 
having to repeat yourself.  :-)

--bb

"Steven Schveighoffer" <schveiguy yahoo.com> writes:

"Bill Baxter" wrote
 jicman wrote:
 Steven Schveighoffer Wrote:

 "jicman" wrote
 Greetings.

 Long time no write. :-)

 I know that I can get the keys of an Associative array and do a foreach 
 loop and remove the keys of the array, but is there an easier and 
 quicker way?  I know that I can set any non-Associative array to [], 
 ie,

 myArr = [];

 and that is sufficient or set the length to 0; but how about the 
 Associative arrays?  Is there a quick way of doing this?

 thanks,

 josé

 How about

 myArr = myArr.init;

 Works for both associative and standard arrays

 Thanks Steve.  This one worked.

 Are you implying that
    myArr=null;
 did not work?  because it should.  And it's less typing.  And avoids you 
 having to repeat yourself.  :-)

Ha ha! jicman liked my idea better.  Jealous much?

j/k, I like your solution better :)

-Steve 

bearophile <bearophileHUGS lycos.com> writes:

Steven Schveighoffer:
 Ha ha! jicman liked my idea better.  Jealous much?
 j/k, I like your solution better :)

Try this:

import std.stdio;
void main() {
    int[int] a = [10:20, 30:40];
    auto b = a;
    writefln(a, " ", b);
    a = null;
    writefln(a, " ", b);
}

It outputs:

[10:20,30:40] [10:20,30:40]
[] [10:20,30:40]

Bye,
bearophile

jicman <cabrera_ _wrc.xerox.com> writes:

Bill Baxter Wrote:

 jicman wrote:
 Steven Schveighoffer Wrote:
 
 "jicman" wrote
 Greetings.

 Long time no write. :-)

 I know that I can get the keys of an Associative array and do a foreach 
 loop and remove the keys of the array, but is there an easier and quicker 
 way?  I know that I can set any non-Associative array to [], ie,

 myArr = [];

 and that is sufficient or set the length to 0; but how about the 
 Associative arrays?  Is there a quick way of doing this?

 thanks,

 josé

 How about

 myArr = myArr.init;

 Works for both associative and standard arrays

 
 Thanks Steve.  This one worked.

 
 Are you implying that
     myArr=null;
 did not work?  because it should.  And it's less typing.  And avoids you 
 having to repeat yourself.  :-)

No, I just tried the .init and it worked and that is what I wanted. .-)