Re: problem with isnan
On 11/11/2016 01:34 PM, John C via Digitalmars-d-learn wrote: On Friday, 11 November 2016 at 20:55:52 UTC, Charles Hixson wrote: Thank you. Unfortunately: importstd.math; ... assert(isNan (c.curActivation), "cell has unexpected curActivation: %s".format(c.curActivation)); yields: cell.d(292): Error: undefined identifier 'isNan', did you mean overloadset 'isnan'? It should be isNaN. Ok, now it seems the same as std.math.isnan, (i.e., it works properly). On looking over the error messages more closely (just now) I noticed that the line number had now changed. Whoops! It just *LOOKED* like the error hadn't been fixed, where it had actually moved onto the next one. The hint should have been that it was printing an integer value...I mean besides the changed line number.
Re: problem with isnan
On Friday, 11 November 2016 at 20:55:52 UTC, Charles Hixson wrote: Thank you. Unfortunately: importstd.math; ... assert(isNan (c.curActivation), "cell has unexpected curActivation: %s".format(c.curActivation)); yields: cell.d(292): Error: undefined identifier 'isNan', did you mean overloadset 'isnan'? It should be isNaN.
Re: problem with isnan
On 11/11/2016 10:31 AM, pineapple via Digitalmars-d-learn wrote: On Thursday, 10 November 2016 at 16:47:30 UTC, Adam D. Ruppe wrote: On Thursday, 10 November 2016 at 16:41:56 UTC, Charles Hixson wrote: It's *supposed* to be nan, and the assert message reports that it is, but it should pass the assert test, not throw an assertion. What am I doing wrong? How did you set it? There are like billions of different NaNs. I'm not sure if isnan checks for all of them. (I'm also not sure that it doesn't, the docs don't specify.) you might try using std.math.isNaN instead and see what it does. Incidentally, I just recently submitted a PR to fix this. What probably happened is that you're referring to a limited `isnan` method defined as a unittest utility method in object.d that should have been private but wasn't. You want to use `isNan` instead. Thank you. Unfortunately: importstd.math; ... assert(isNan (c.curActivation), "cell has unexpected curActivation: %s".format(c.curActivation)); yields: cell.d(292): Error: undefined identifier 'isNan', did you mean overloadset 'isnan'? while: importstd.math; ... assert(std.math.isnan (c.curActivation), "cell has unexpected curActivation: %s".format(c.curActivation)); yields: core.exception.AssertError@cell.d(310): cell has unexpected idno: 636144943519357244 That is, indeed, an unexpected value, unless it's some representation of Nan, in which case it should have passed the assert. I notice that it doesn't appear to be a float, which puzzles me.
Re: problem with isnan
On Thursday, 10 November 2016 at 16:47:30 UTC, Adam D. Ruppe wrote: On Thursday, 10 November 2016 at 16:41:56 UTC, Charles Hixson wrote: It's *supposed* to be nan, and the assert message reports that it is, but it should pass the assert test, not throw an assertion. What am I doing wrong? How did you set it? There are like billions of different NaNs. I'm not sure if isnan checks for all of them. (I'm also not sure that it doesn't, the docs don't specify.) you might try using std.math.isNaN instead and see what it does. Incidentally, I just recently submitted a PR to fix this. What probably happened is that you're referring to a limited `isnan` method defined as a unittest utility method in object.d that should have been private but wasn't. You want to use `isNan` instead.
Re: problem with isnan
On Thursday, 10 November 2016 at 23:45:01 UTC, Charles Hixson wrote: you might try using std.math.isNaN instead and see what it does. It was default initialized by the class instance: classCell ... floatcurActivation; ... The this method doesn't have any mention of a few variables that are supposed to be default initialized, or which curActivation is one. std.math.isNaN should work for the default initialization (at least it does for doubles)
Re: problem with isnan
Dne 10.11.2016 v 17:41 Charles Hixson via Digitalmars-d-learn napsal(a): The line: assert(isnan (c.curActivation), "cell has unexpected curActivation: %s".format(c.curActivation)); throws the exception: core.exception.AssertError@cell.d(285): cell has unexpected curActivation: nan and I've looked at it backwards and forwards and don't understand why. It's *supposed* to be nan, and the assert message reports that it is, but it should pass the assert test, not throw an assertion. What am I doing wrong? You need to use https://dlang.org/library/std/math/is_nan.html
Re: problem with isnan
On 11/10/2016 08:47 AM, Adam D. Ruppe via Digitalmars-d-learn wrote: On Thursday, 10 November 2016 at 16:41:56 UTC, Charles Hixson wrote: It's *supposed* to be nan, and the assert message reports that it is, but it should pass the assert test, not throw an assertion. What am I doing wrong? How did you set it? There are like billions of different NaNs. I'm not sure if isnan checks for all of them. (I'm also not sure that it doesn't, the docs don't specify.) you might try using std.math.isNaN instead and see what it does. It was default initialized by the class instance: classCell ... floatcurActivation; ... The this method doesn't have any mention of a few variables that are supposed to be default initialized, or which curActivation is one. I suppose I could set it to be -2.0 or something, but that doesn't really tell me what's going on.
Re: problem with isnan
On Thursday, 10 November 2016 at 16:41:56 UTC, Charles Hixson wrote: It's *supposed* to be nan, and the assert message reports that it is, but it should pass the assert test, not throw an assertion. What am I doing wrong? How did you set it? There are like billions of different NaNs. I'm not sure if isnan checks for all of them. (I'm also not sure that it doesn't, the docs don't specify.) you might try using std.math.isNaN instead and see what it does.
problem with isnan
The line: assert(isnan (c.curActivation), "cell has unexpected curActivation: %s".format(c.curActivation)); throws the exception: core.exception.AssertError@cell.d(285): cell has unexpected curActivation: nan and I've looked at it backwards and forwards and don't understand why. It's *supposed* to be nan, and the assert message reports that it is, but it should pass the assert test, not throw an assertion. What am I doing wrong?
