• steven kladitis (11/11) Nov 09 2015 void main() {
• Cauterite (4/4) Nov 09 2015 Here's the output I get (DMD v2.068.2):
• lobo (7/11) Nov 09 2015 iota.front() is complaining the range is empty from this line.
• steven kladitis (5/18) Nov 10 2015 with dmd 2.069
• lobo (12/34) Nov 11 2015 Hmm, that's different to what I get. On linux 64 bit with dmd
• lobo (2/22) Nov 11 2015 that should be filter!(h => h > 1000)

steven kladitis <steven_kladitis yahoo.com> writes:

void main() {
     import std.stdio, std.algorithm, std.range, std.conv;

     enum digSum = (int n) => n.text.map!(d => d - '0').sum;
//    enum harshads = iota(1, int.max).filter!(n => n % digSum(n) 
== 0);
     enum harshads = iota(1, 256).filter!(n => n % digSum(n) == 0);
     harshads.take(20).writeln;
     harshads.filter!(h => h > 1000).front.writeln;
}

// this compiles but always prints 1 number and gets 
object.Error (0): Access Violation

Cauterite <cauterite gmail.com> writes:

Here's the output I get (DMD v2.068.2):

[1, 3, 10, 12, 21, 30, 100, 102, 111, 120, 201, 210]
core.exception.AssertError std\range\package.d(4603): Assertion 
failure

lobo <swamplobo gmail.com> writes:

On Tuesday, 10 November 2015 at 04:34:22 UTC, Cauterite wrote:
 Here's the output I get (DMD v2.068.2):

 [1, 3, 10, 12, 21, 30, 100, 102, 111, 120, 201, 210]
 core.exception.AssertError std\range\package.d(4603): Assertion 
 failure

iota.front() is complaining the range is empty from this line.

     harshads.filter!(h => h > 1000).front.writeln;

your hardas has no values > 1000 so the filter is empty. hardwas 
was seeded with iota(1,256), so the maximum value will be 252.

bye,
lobo

steven kladitis <steven_kladitis yahoo.com> writes:

On Tuesday, 10 November 2015 at 05:14:29 UTC, lobo wrote:
 On Tuesday, 10 November 2015 at 04:34:22 UTC, Cauterite wrote:
 Here's the output I get (DMD v2.068.2):

 [1, 3, 10, 12, 21, 30, 100, 102, 111, 120, 201, 210]
 core.exception.AssertError std\range\package.d(4603): 
 Assertion failure

 iota.front() is complaining the range is empty from this line.

     harshads.filter!(h => h > 1000).front.writeln;

 your hardas has no values > 1000 so the filter is empty. 
 hardwas was seeded with iota(1,256), so the maximum value will 
 be 252.

 bye,
 lobo


with dmd 2.069
I always get
--> [1
and then the error no matter what I canhe that line to.

lobo <swamplobo gmail.com> writes:

On Tuesday, 10 November 2015 at 14:25:19 UTC, steven kladitis 
wrote:
 On Tuesday, 10 November 2015 at 05:14:29 UTC, lobo wrote:
 On Tuesday, 10 November 2015 at 04:34:22 UTC, Cauterite wrote:
 Here's the output I get (DMD v2.068.2):

 [1, 3, 10, 12, 21, 30, 100, 102, 111, 120, 201, 210]
 core.exception.AssertError std\range\package.d(4603): 
 Assertion failure

 iota.front() is complaining the range is empty from this line.

     harshads.filter!(h => h > 1000).front.writeln;

 your hardas has no values > 1000 so the filter is empty. 
 hardwas was seeded with iota(1,256), so the maximum value will 
 be 252.

 bye,
 lobo


 with dmd 2.069
 I always get
 --> [1
 and then the error no matter what I canhe that line to.

Hmm, that's different to what I get. On linux 64 bit with dmd 
2.069 I get this:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 18, 20, 21, 24, 27, 30, 36, 
40, 42]
core.exception.AssertError std/range/package.d(4691): Assertion 
failure


Note the assertion is same as before; hardas has no values > 252 
so filter!(h => h < 1000) results in an empty range.

bye,
lobo

lobo <swamplobo gmail.com> writes:

On Thursday, 12 November 2015 at 02:36:23 UTC, lobo wrote:
 On Tuesday, 10 November 2015 at 14:25:19 UTC, steven kladitis 
 wrote:
 On Tuesday, 10 November 2015 at 05:14:29 UTC, lobo wrote:
 [...]


 with dmd 2.069
 I always get
 --> [1
 and then the error no matter what I canhe that line to.

 Hmm, that's different to what I get. On linux 64 bit with dmd 
 2.069 I get this:

 [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 18, 20, 21, 24, 27, 30, 36, 
 40, 42]
 core.exception.AssertError std/range/package.d(4691): Assertion 
 failure


 Note the assertion is same as before; hardas has no values > 
 252 so filter!(h => h < 1000) results in an empty range.

 bye,
 lobo

that should be filter!(h => h > 1000)