[Haskell-cafe] Having trouble with zip12..
I have some code that looks like this and I'm having trouble with it: zip12 ((tails . nub) flightPaths) wayPoints etopsPackets (hd geoCaches) groundSpeeds headings (map windShift headings) (regulations !! 2) (foldr (\|/) (tail pathDistances)) [ghy x | x - [1..], full x] (nub . nub) arrivalSchedule The domain is air traffic control and I need to generate 12-tuples for aircraft that are within a particular radius of the tower. When I evaluate that expression with 'take 4' it works fine. When I evaluate it with 'take 6' it works as well. But, when I evaluate it with 'take 5' I get the following runtime error from H# in Visual Studio (it runs fine on the command line). This is particularly odd because I'm not using Sql. The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. Exception (TypeInitializationException): Source=System.Data; Target=null; Tag=null; TypeName=System.Data.SqlClient.SqlConnection; Message = The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnection..cctor() InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnectionFactory..ctor() at System.Data.SqlClient.SqlConnectionFactory..cctor() InnerException (ConfigurationErrorsException): Source=System.Configuration; Target=null; Tag=null; Line=21; Message = The value of the property 'traceOutputOptions' cannot be parsed. The error is: The enumeration value must be one of the following: None, LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack. (C:\Documents and Settings\Paey\Desktop\Projects\RPMC\bin\Debug\RPMC.vshost.exe.config line 21) StackTrace = at System.Configuration.BaseConfigurationRecord.EvaluateOne(String[] keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult) at System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean ch... (truncated) ...olean checkPermission) at System.Configuration.BaseConfigurationRecord.GetSection(String configKey) at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName) at System.Configuration.ConfigurationManager.GetSection(String sectionName) at System.Configuration.PrivilegedConfigurationManager.GetSection(String sectionName) at System.Diagnostics.DiagnosticsConfiguration.GetConfigSection() at System.Diagnostics.DiagnosticsConfiguration.Initialize() at System.Diagnostics.Switch.InitializeConfigSettings() at System.Diagnostics.Switch.InitializeWithStatus() at System.Diagnostics.Switch.get_SwitchSetting() at System.Diagnostics.TraceSwitch.get_Level() at System.Data.ProviderBase.DbConnectionPoolCounters..ctor(String categoryName, String categoryHelp) at System.Data.SqlClient.SqlPerformanceCounters..ctor() at System.Data.SqlClient.SqlPerformanceCounters..cctor() BareMessage = The value of the property 'traceOutputOptions' cannot be parsed. The error is: The enumeration value must be one of the following: None, LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack. Filename = C:\Documents and Settings\Pley\Desktop\Projects\RPMC\bin\Debug\RPMC.vshost.exe.config Errors (ConfigurationException[]): Length=1; Rank=1; Count=1; #0 (ConfigurationErrorsException): Source=null; Target=null; Tag=null; StackTrace=null; BareMessage=(-BareMessage); Filename=(-Filename); Line=21; Message = The value of the property 'traceOutputOptions' cannot be parsed. The error is: The enumeration value must be one of the following: None, LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack. (C:\Documents and Settings\Pley\Desktop\Projects\RPMC\bin\Debug\RPMC.vshost.exe.config line 21) Errors (ConfigurationException[]): Length=1; Rank=1; Count=1; #0 (ConfigurationErrorsException):
Re: [Haskell-cafe] Having trouble with zip12..
mfeathers:
I have some code that looks like this and I'm having trouble with it:
zip12 ((tails . nub) flightPaths) wayPoints etopsPackets (hd geoCaches)
groundSpeeds headings (map windShift headings) (regulations !! 2)
(foldr (\|/) (tail pathDistances)) [ghy x | x - [1..], full x]
(nub . nub) arrivalSchedule
The domain is air traffic control and I need to generate 12-tuples for
aircraft that are within a particular radius of the tower.
12 tuples are really really unusual. It sounds like perhaps you should
be using a custom data type here.
data Aircraft = Aircraft
{ wayPoints= currentWayPoints
, groundSpeeds = ...
, headings = ...
, etc ...
}
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Re: [Haskell-cafe] Having trouble with zip12..
You're zipping 12 lists here, so how about testing each list individually? This will narrow down the problem considerably. Michael Feathers wrote: I have some code that looks like this and I'm having trouble with it: zip12 ((tails . nub) flightPaths) wayPoints etopsPackets (hd geoCaches) groundSpeeds headings (map windShift headings) (regulations !! 2) (foldr (\|/) (tail pathDistances)) [ghy x | x - [1..], full x] (nub . nub) arrivalSchedule The domain is air traffic control and I need to generate 12-tuples for aircraft that are within a particular radius of the tower. When I evaluate that expression with 'take 4' it works fine. When I evaluate it with 'take 6' it works as well. But, when I evaluate it with 'take 5' I get the following runtime error from H# in Visual Studio (it runs fine on the command line). This is particularly odd because I'm not using Sql. The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. Exception (TypeInitializationException): Source=System.Data; Target=null; Tag=null; TypeName=System.Data.SqlClient.SqlConnection; Message = The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnection..cctor() InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnectionFactory..ctor() at System.Data.SqlClient.SqlConnectionFactory..cctor() InnerException (ConfigurationErrorsException): Source=System.Configuration; Target=null; Tag=null; Line=21; Message = The value of the property 'traceOutputOptions' cannot be parsed. The error is: The enumeration value must be one of the following: None, LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack. (C:\Documents and Settings\Paey\Desktop\Projects\RPMC\bin\Debug\RPMC.vshost.exe.config line 21) StackTrace = at System.Configuration.BaseConfigurationRecord.EvaluateOne(String[] keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult) at System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean ch... (truncated) ...olean checkPermission) at System.Configuration.BaseConfigurationRecord.GetSection(String configKey) at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName) at System.Configuration.ConfigurationManager.GetSection(String sectionName) at System.Configuration.PrivilegedConfigurationManager.GetSection(String sectionName) at System.Diagnostics.DiagnosticsConfiguration.GetConfigSection() at System.Diagnostics.DiagnosticsConfiguration.Initialize() at System.Diagnostics.Switch.InitializeConfigSettings() at System.Diagnostics.Switch.InitializeWithStatus() at System.Diagnostics.Switch.get_SwitchSetting() at System.Diagnostics.TraceSwitch.get_Level() at System.Data.ProviderBase.DbConnectionPoolCounters..ctor(String categoryName, String categoryHelp) at System.Data.SqlClient.SqlPerformanceCounters..ctor() at System.Data.SqlClient.SqlPerformanceCounters..cctor() BareMessage = The value of the property 'traceOutputOptions' cannot be parsed. The error is: The enumeration value must be one of the following: None, LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack. Filename = C:\Documents and Settings\Pley\Desktop\Projects\RPMC\bin\Debug\RPMC.vshost.exe.config Errors (ConfigurationException[]): Length=1; Rank=1; Count=1; #0 (ConfigurationErrorsException): Source=null; Target=null; Tag=null; StackTrace=null; BareMessage=(-BareMessage); Filename=(-Filename); Line=21; Message = The value of the property 'traceOutputOptions' cannot be parsed. The error is: The enumeration value must be one of the following: None, LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack.
Re: [Haskell-cafe] Having trouble with zip12..
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Michael Feathers wrote: I have some code that looks like this and I'm having trouble with it: zip12 ((tails . nub) flightPaths) wayPoints etopsPackets (hd geoCaches) groundSpeeds headings (map windShift headings) (regulations !! 2) (foldr (\|/) (tail pathDistances)) [ghy x | x - [1..], full x] (nub . nub) arrivalSchedule Hi Michael, Sorry to distract from your issue, but I note that (nub . nub) can be replaced with just 'nub' since the function nub is idempotent (f . f == f). dibblego @check \x - (nub . nub) x == nub x -- is nub idempotent? lambdabot OK, passed 500 tests. - -- Tony Morris http://tmorris.net/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFIcS9LmnpgrYe6r60RAiDOAKCJlDaqNd5ssgxrUrrHee75WGzhbgCfftdn 70+4isXh4zaoYly0da2Gdk8= =ryfF -END PGP SIGNATURE- ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Having trouble with zip12..
Sorry guys. I was just bored on a Sunday afternoon so I thought I'd type up a little joke. I thought to myself Gee, how outrageous can I make it? 1) Using and debugging a zip12 function. 2) That fails only on 'take 5' (Brubeck fans take note) 3) Has some absurd arguments like (nub . nub) 4) Is embedded in an air traffic control system 5) Is written in a Microsoft variant of Haskell called H# 6) Silently makes SQL calls when evaluating a pure function 7) Yields an mile long stack trace Sorry all. Boredom made me do it, Michael Paul Visschers wrote: You're zipping 12 lists here, so how about testing each list individually? This will narrow down the problem considerably. Michael Feathers wrote: I have some code that looks like this and I'm having trouble with it: zip12 ((tails . nub) flightPaths) wayPoints etopsPackets (hd geoCaches) groundSpeeds headings (map windShift headings) (regulations !! 2) (foldr (\|/) (tail pathDistances)) [ghy x | x - [1..], full x] (nub . nub) arrivalSchedule The domain is air traffic control and I need to generate 12-tuples for aircraft that are within a particular radius of the tower. When I evaluate that expression with 'take 4' it works fine. When I evaluate it with 'take 6' it works as well. But, when I evaluate it with 'take 5' I get the following runtime error from H# in Visual Studio (it runs fine on the command line). This is particularly odd because I'm not using Sql. The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. Exception (TypeInitializationException): Source=System.Data; Target=null; Tag=null; TypeName=System.Data.SqlClient.SqlConnection; Message = The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnection..cctor() InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnectionFactory..ctor() at System.Data.SqlClient.SqlConnectionFactory..cctor() InnerException (ConfigurationErrorsException): Source=System.Configuration; Target=null; Tag=null; Line=21; Message = The value of the property 'traceOutputOptions' cannot be parsed. The error is: The enumeration value must be one of the following: None, LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack. (C:\Documents and Settings\Paey\Desktop\Projects\RPMC\bin\Debug\RPMC.vshost.exe.config line 21) StackTrace = at System.Configuration.BaseConfigurationRecord.EvaluateOne(String[] keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult) at System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean ch... (truncated) ...olean checkPermission) at System.Configuration.BaseConfigurationRecord.GetSection(String configKey) at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName) at System.Configuration.ConfigurationManager.GetSection(String sectionName) at System.Configuration.PrivilegedConfigurationManager.GetSection(String sectionName) at System.Diagnostics.DiagnosticsConfiguration.GetConfigSection() at System.Diagnostics.DiagnosticsConfiguration.Initialize() at System.Diagnostics.Switch.InitializeConfigSettings() at System.Diagnostics.Switch.InitializeWithStatus() at System.Diagnostics.Switch.get_SwitchSetting() at System.Diagnostics.TraceSwitch.get_Level() at System.Data.ProviderBase.DbConnectionPoolCounters..ctor(String categoryName, String categoryHelp) at System.Data.SqlClient.SqlPerformanceCounters..ctor() at System.Data.SqlClient.SqlPerformanceCounters..cctor() BareMessage = The value of the property 'traceOutputOptions' cannot be parsed. The error is: The enumeration value must be one of the following: None, LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack. Filename = C:\Documents and
Re: [Haskell-cafe] Having trouble with zip12..
I win, almost ... 13:13:18 dons dolio: yeah, it was ... almost ... an April 1 style post :) And yes, this was truly shocking on a number of levels. However, we have people doing a lot of weird things with Haskell these days, so its not as absurd that someone would be hacking up a zip12 for an air traffic control system on some MS platform, with SQL in the backend, as it might have been a few years ago :) mfeathers: Sorry guys. I was just bored on a Sunday afternoon so I thought I'd type up a little joke. I thought to myself Gee, how outrageous can I make it? 1) Using and debugging a zip12 function. 2) That fails only on 'take 5' (Brubeck fans take note) 3) Has some absurd arguments like (nub . nub) 4) Is embedded in an air traffic control system 5) Is written in a Microsoft variant of Haskell called H# 6) Silently makes SQL calls when evaluating a pure function 7) Yields an mile long stack trace Sorry all. Boredom made me do it, Michael Paul Visschers wrote: You're zipping 12 lists here, so how about testing each list individually? This will narrow down the problem considerably. Michael Feathers wrote: I have some code that looks like this and I'm having trouble with it: zip12 ((tails . nub) flightPaths) wayPoints etopsPackets (hd geoCaches) groundSpeeds headings (map windShift headings) (regulations !! 2) (foldr (\|/) (tail pathDistances)) [ghy x | x - [1..], full x] (nub . nub) arrivalSchedule The domain is air traffic control and I need to generate 12-tuples for aircraft that are within a particular radius of the tower. When I evaluate that expression with 'take 4' it works fine. When I evaluate it with 'take 6' it works as well. But, when I evaluate it with 'take 5' I get the following runtime error from H# in Visual Studio (it runs fine on the command line). This is particularly odd because I'm not using Sql. The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. Exception (TypeInitializationException): Source=System.Data; Target=null; Tag=null; TypeName=System.Data.SqlClient.SqlConnection; Message = The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnection..cctor() InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnectionFactory..ctor() at System.Data.SqlClient.SqlConnectionFactory..cctor() InnerException (ConfigurationErrorsException): Source=System.Configuration; Target=null; Tag=null; Line=21; Message = The value of the property 'traceOutputOptions' cannot be parsed. The error is: The enumeration value must be one of the following: None, LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack. (C:\Documents and Settings\Paey\Desktop\Projects\RPMC\bin\Debug\RPMC.vshost.exe.config line 21) StackTrace = at System.Configuration.BaseConfigurationRecord.EvaluateOne(String[] keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult) at System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean ch... (truncated) ...olean checkPermission) at System.Configuration.BaseConfigurationRecord.GetSection(String configKey) at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName) at System.Configuration.ConfigurationManager.GetSection(String sectionName) at System.Configuration.PrivilegedConfigurationManager.GetSection(String sectionName) at System.Diagnostics.DiagnosticsConfiguration.GetConfigSection() at System.Diagnostics.DiagnosticsConfiguration.Initialize() at System.Diagnostics.Switch.InitializeConfigSettings() at System.Diagnostics.Switch.InitializeWithStatus() at System.Diagnostics.Switch.get_SwitchSetting() at
Re: [Haskell-cafe] Having trouble with zip12..
Wow. Where did you come up with the stack trace? That's...impressive. On Sun, Jul 6, 2008 at 5:07 PM, Don Stewart [EMAIL PROTECTED] wrote: I win, almost ... 13:13:18 dons dolio: yeah, it was ... almost ... an April 1 style post :) And yes, this was truly shocking on a number of levels. However, we have people doing a lot of weird things with Haskell these days, so its not as absurd that someone would be hacking up a zip12 for an air traffic control system on some MS platform, with SQL in the backend, as it might have been a few years ago :) mfeathers: Sorry guys. I was just bored on a Sunday afternoon so I thought I'd type up a little joke. I thought to myself Gee, how outrageous can I make it? 1) Using and debugging a zip12 function. 2) That fails only on 'take 5' (Brubeck fans take note) 3) Has some absurd arguments like (nub . nub) 4) Is embedded in an air traffic control system 5) Is written in a Microsoft variant of Haskell called H# 6) Silently makes SQL calls when evaluating a pure function 7) Yields an mile long stack trace Sorry all. Boredom made me do it, Michael Paul Visschers wrote: You're zipping 12 lists here, so how about testing each list individually? This will narrow down the problem considerably. Michael Feathers wrote: I have some code that looks like this and I'm having trouble with it: zip12 ((tails . nub) flightPaths) wayPoints etopsPackets (hd geoCaches) groundSpeeds headings (map windShift headings) (regulations !! 2) (foldr (\|/) (tail pathDistances)) [ghy x | x - [1..], full x] (nub . nub) arrivalSchedule The domain is air traffic control and I need to generate 12-tuples for aircraft that are within a particular radius of the tower. When I evaluate that expression with 'take 4' it works fine. When I evaluate it with 'take 6' it works as well. But, when I evaluate it with 'take 5' I get the following runtime error from H# in Visual Studio (it runs fine on the command line). This is particularly odd because I'm not using Sql. The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. Exception (TypeInitializationException): Source=System.Data; Target=null; Tag=null; TypeName=System.Data.SqlClient.SqlConnection; Message = The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnection..cctor() InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnectionFactory..ctor() at System.Data.SqlClient.SqlConnectionFactory..cctor() InnerException (ConfigurationErrorsException): Source=System.Configuration; Target=null; Tag=null; Line=21; Message = The value of the property 'traceOutputOptions' cannot be parsed. The error is: The enumeration value must be one of the following: None, LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack. (C:\Documents and Settings\Paey\Desktop\Projects\RPMC\bin\Debug\RPMC.vshost.exe.config line 21) StackTrace = at System.Configuration.BaseConfigurationRecord.EvaluateOne(String[] keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult) at System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean ch... (truncated) ...olean checkPermission) at System.Configuration.BaseConfigurationRecord.GetSection(String configKey) at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName) at System.Configuration.ConfigurationManager.GetSection(String sectionName) at System.Configuration.PrivilegedConfigurationManager.GetSection(String sectionName) at System.Diagnostics.DiagnosticsConfiguration.GetConfigSection() at System.Diagnostics.DiagnosticsConfiguration.Initialize() at
Re: [Haskell-cafe] Having trouble with zip12..
Don Stewart wrote: I win, almost ... 13:13:18 dons dolio: yeah, it was ... almost ... an April 1 style post :) And yes, this was truly shocking on a number of levels. However, we have people doing a lot of weird things with Haskell these days, so its not as absurd that someone would be hacking up a zip12 for an air traffic control system on some MS platform, with SQL in the backend, as it might have been a few years ago :) :-) Was that IRC? Oh boy, now I have a reputation. Michael mfeathers: Sorry guys. I was just bored on a Sunday afternoon so I thought I'd type up a little joke. I thought to myself Gee, how outrageous can I make it? 1) Using and debugging a zip12 function. 2) That fails only on 'take 5' (Brubeck fans take note) 3) Has some absurd arguments like (nub . nub) 4) Is embedded in an air traffic control system 5) Is written in a Microsoft variant of Haskell called H# 6) Silently makes SQL calls when evaluating a pure function 7) Yields an mile long stack trace Sorry all. Boredom made me do it, Michael Paul Visschers wrote: You're zipping 12 lists here, so how about testing each list individually? This will narrow down the problem considerably. Michael Feathers wrote: I have some code that looks like this and I'm having trouble with it: zip12 ((tails . nub) flightPaths) wayPoints etopsPackets (hd geoCaches) groundSpeeds headings (map windShift headings) (regulations !! 2) (foldr (\|/) (tail pathDistances)) [ghy x | x - [1..], full x] (nub . nub) arrivalSchedule The domain is air traffic control and I need to generate 12-tuples for aircraft that are within a particular radius of the tower. When I evaluate that expression with 'take 4' it works fine. When I evaluate it with 'take 6' it works as well. But, when I evaluate it with 'take 5' I get the following runtime error from H# in Visual Studio (it runs fine on the command line). This is particularly odd because I'm not using Sql. The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. Exception (TypeInitializationException): Source=System.Data; Target=null; Tag=null; TypeName=System.Data.SqlClient.SqlConnection; Message = The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnection..cctor() InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnectionFactory..ctor() at System.Data.SqlClient.SqlConnectionFactory..cctor() InnerException (ConfigurationErrorsException): Source=System.Configuration; Target=null; Tag=null; Line=21; Message = The value of the property 'traceOutputOptions' cannot be parsed. The error is: The enumeration value must be one of the following: None, LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack. (C:\Documents and Settings\Paey\Desktop\Projects\RPMC\bin\Debug\RPMC.vshost.exe.config line 21) StackTrace = at System.Configuration.BaseConfigurationRecord.EvaluateOne(String[] keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult) at System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean ch... (truncated) ...olean checkPermission) at System.Configuration.BaseConfigurationRecord.GetSection(String configKey) at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName) at System.Configuration.ConfigurationManager.GetSection(String sectionName) at System.Configuration.PrivilegedConfigurationManager.GetSection(String sectionName) at System.Diagnostics.DiagnosticsConfiguration.GetConfigSection() at System.Diagnostics.DiagnosticsConfiguration.Initialize() at System.Diagnostics.Switch.InitializeConfigSettings() at System.Diagnostics.Switch.InitializeWithStatus() at System.Diagnostics.Switch.get_SwitchSetting() at System.Diagnostics.TraceSwitch.get_Level() at
Re: [Haskell-cafe] Having trouble with zip12..
Andrew Wagner wrote: Wow. Where did you come up with the stack trace? That's...impressive. Pulled it from a blog. I was actually looking for a creepy VB4 or VB5 stack trace I saw years ago that ripped through their dynamic type resolution layer. Now that would've been funny. :-) Michael On Sun, Jul 6, 2008 at 5:07 PM, Don Stewart [EMAIL PROTECTED] wrote: I win, almost ... 13:13:18 dons dolio: yeah, it was ... almost ... an April 1 style post :) And yes, this was truly shocking on a number of levels. However, we have people doing a lot of weird things with Haskell these days, so its not as absurd that someone would be hacking up a zip12 for an air traffic control system on some MS platform, with SQL in the backend, as it might have been a few years ago :) mfeathers: Sorry guys. I was just bored on a Sunday afternoon so I thought I'd type up a little joke. I thought to myself Gee, how outrageous can I make it? 1) Using and debugging a zip12 function. 2) That fails only on 'take 5' (Brubeck fans take note) 3) Has some absurd arguments like (nub . nub) 4) Is embedded in an air traffic control system 5) Is written in a Microsoft variant of Haskell called H# 6) Silently makes SQL calls when evaluating a pure function 7) Yields an mile long stack trace Sorry all. Boredom made me do it, Michael Paul Visschers wrote: You're zipping 12 lists here, so how about testing each list individually? This will narrow down the problem considerably. Michael Feathers wrote: I have some code that looks like this and I'm having trouble with it: zip12 ((tails . nub) flightPaths) wayPoints etopsPackets (hd geoCaches) groundSpeeds headings (map windShift headings) (regulations !! 2) (foldr (\|/) (tail pathDistances)) [ghy x | x - [1..], full x] (nub . nub) arrivalSchedule The domain is air traffic control and I need to generate 12-tuples for aircraft that are within a particular radius of the tower. When I evaluate that expression with 'take 4' it works fine. When I evaluate it with 'take 6' it works as well. But, when I evaluate it with 'take 5' I get the following runtime error from H# in Visual Studio (it runs fine on the command line). This is particularly odd because I'm not using Sql. The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. Exception (TypeInitializationException): Source=System.Data; Target=null; Tag=null; TypeName=System.Data.SqlClient.SqlConnection; Message = The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnection..cctor() InnerException (TypeInitializationException): Source=System.Data; Target=null; Tag=null; Message = The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception. StackTrace = at System.Data.SqlClient.SqlConnectionFactory..ctor() at System.Data.SqlClient.SqlConnectionFactory..cctor() InnerException (ConfigurationErrorsException): Source=System.Configuration; Target=null; Tag=null; Line=21; Message = The value of the property 'traceOutputOptions' cannot be parsed. The error is: The enumeration value must be one of the following: None, LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack. (C:\Documents and Settings\Paey\Desktop\Projects\RPMC\bin\Debug\RPMC.vshost.exe.config line 21) StackTrace = at System.Configuration.BaseConfigurationRecord.EvaluateOne(String[] keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult) at System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object result, Object resultRuntimeObject) at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean ch... (truncated) ...olean checkPermission) at System.Configuration.BaseConfigurationRecord.GetSection(String configKey) at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName) at System.Configuration.ConfigurationManager.GetSection(String sectionName) at System.Configuration.PrivilegedConfigurationManager.GetSection(String sectionName) at
Re: [Haskell-cafe] Having trouble with zip12..
On 2008 Jul 6, at 16:47, Tony Morris wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Michael Feathers wrote: zip12 ((tails . nub) flightPaths) wayPoints etopsPackets (hd geoCaches) groundSpeeds headings (map windShift headings) (regulations !! 2) (foldr (\|/) (tail pathDistances)) [ghy x | x - [1..], full x] (nub . nub) arrivalSchedule Hi Michael, Sorry to distract from your issue, but I note that (nub . nub) can be replaced with just 'nub' since the function nub is idempotent (f . f == f). Or even better, with a custom nub: in order to handle some special cases the Prelude nub is rather inefficient. -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] [EMAIL PROTECTED] system administrator [openafs,heimdal,too many hats] [EMAIL PROTECTED] electrical and computer engineering, carnegie mellon universityKF8NH ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
