Re: why does this error out?

[lobo via Digitalmars-d-learn]

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)

Re: why does this error out?

[lobo via Digitalmars-d-learn]

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

Re: why does this error out?

[steven kladitis via Digitalmars-d-learn]

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.

Re: why does this error out?

[Cauterite via Digitalmars-d-learn]

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

Re: why does this error out?

[lobo via Digitalmars-d-learn]

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

why does this error out?

[steven kladitis via Digitalmars-d-learn]

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