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• What does * address(found in printf) mean in assembly?

  - by Mask

  Disassembling printf doesn't give much info: (gdb) disas printf Dump of assembler code for function printf: 0x00401b38 <printf+0>: jmp *0x405130 0x00401b3e <printf+6>: nop 0x00401b3f <printf+7>: nop End of assembler dump. (gdb) disas 0x405130 Dump of assembler code for function _imp__printf: 0x00405130 <_imp__printf+0>: je 0x405184 <_imp__vfprintf+76> 0x00405132 <_imp__printf+2>: add %al,(%eax) How is it implemented under the hood? Why disassembling doesn't help? What does * mean before 0x405130?

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• What does a syntax like this mean in C#?

  - by hmm

  What does a syntax like this mean in C#? public abstract class HostFactory<TApp> : ServiceHostFactory where TApp : IFoo

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• Generation of an array with defined Min, Max, Mean and Stdev with given number of elements and error

  - by Viet

  I'd like to generate an array with defined Min, Max, Mean and Stdev with given number of elements and error level. Is there such a library in C, C++, PHP or Python to do so? Please kindly advise. Thanks!

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• What does it mean whether network device is Loopback?

  - by Gtker

  Does it mean that the Loopback device handles the request like ping localhost ? If so, there should be at least one device that's loopback,but seems none of my two network device is Loopback: rpcap://\Device\NPF_{45D5ADA0-095E-49F3-BEA1-E8754390F2D4} Description: Network adapter 'Intel(R) PRO/Wireless 2200BG Network Conne ction (Microsoft's Packet Scheduler) ' on local host Loopback: no rpcap://\Device\NPF_{783C5467-4026-473C-86A0-5E5A3708C624} Description: Network adapter 'Realtek RTL8169/8110 Family Gigabit Ethern et NIC (Microsoft's Packet Scheduler) ' on local host Loopback: no Can someone clarify all this?

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• If a run-time error occus in a VB6 app, does this mean Error handling has been turned off?

  - by Craig Johnston

  If a run-time error occur in a VB6 app, does this mean Error handling has been turned off by use of the On Error Goto 0 statement? Can this assumption be made? Or are there are other circumstances in which a run-time error could occur? If an error has been handled by either a Resume Next or a Goto then surely a run-time error would not occur. True or False?

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• Generation of an array of Random numbers with defined Min, Max, Mean and Stdev with given number of

  - by Viet

  I'd like to generate an array of Random numbers with defined Min, Max, Mean and Stdev with given number of elements and error level. Is there such a library in C, C++, PHP or Python to do so? Please kindly advise. Thanks!

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• Railroad diagrams - what do the double bars on the ends mean?

  - by Steve

  In the json site, the number and string diagrams are bookended by double bars. What do the double bars mean?

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• What does it mean when we say Hashtable or Vector is synchronized?

  - by zengr

  The questions says it all, just wondering, in an interview, what would you say when they ask you, "What does it practically mean by Hashtable or Vectors being synchronized?"

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• What does error "Precondition failed: this.TokenManager is IOpenIdOAuthTokenManager" mean?

  - by iancarrick

  I'm using the DotNetOpenAuth samples, particularly the OpenIdRelyingPartyWebForms. When I use loginPlusOAuthSampleOP it fails on the LoggedIn event with the error: "Precondition failed: this.TokenManager is IOpenIdOAuthTokenManager" mean? Any ideas what this could be?

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• What does x/bx main+3 mean in gdb?

  - by Mask

  (gdb) x/bx main+3 0x8000133 <main+3>: 0xeb (gdb) 0x8000134 <main+4>: 0x2a .... I've never used x/bx main+3 before,what does it mean?

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• GWT now has spring roo support, what will this mean to GWT developers?

  - by Mark M

  I have been using GWT with App Engine for a while now. Recently there was an announcement that GWT will support Spring Roo and SpringSource Tool Suite (http://googlewebtoolkit.blogspot.com/2010/05/gwt-21-milestone-1-is-now-available.html). I am having trouble seeing the big picture from the Google announcement page. For those without much knowledge of Spring what does this mean for GWT developers used to building swing-like gui's?

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• What does the quotation mark and the colon (?: ternary operator) mean in objective-c?

  - by rdesign

  Hey guys, Google just don't want to give me some useful results. What does this line of code mean? label.frame = (inPseudoEditMode) ? kLabelIndentedRect : kLabelRect; The ? and : confuses me. Thanks a lot!

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• What does the scalpel-shaped icon in the gutter in Visual Studio 2008 mean?

  - by Timwi

  What does this icon mean? It doesn’t seem to have a tooltip, it doesn’t respond on right-click, and it doesn’t seem to want to disappear either.

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• What does 'Conditional expressions can be only boolean, not integral.' mean?

  - by Ole Jak

  What does 'Conditional expressions can be only boolean, not integral.' mean? I do not know Java and I know C++ deffenetly not enought to understend what it means.. Please help (found in http://www.javacoffeebreak.com/articles/thinkinginjava/comparingc++andjava.html in Comparing C++ and Java item 7 sub item 1)

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• On App Engine, what does optimization for reads mean?

  - by Honza Pokorny

  In the documentation for Google App Engine, it says that when designing data models for the datastore, you should "optimize for reads, not writes". What exactly does this mean? What is more 'expensive', CPU intensive or time consuming?

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• array, I/O file and standard deviation (c++)

  - by JohnWong

  double s_deviation(double data[],int cnt, double mean) { int i; double sum= 0; double sdeviation; double x; //x = mean(billy,a_size); for(i=0; i<cnt; i++) { sum += ((data[i]) - (mean)); } sdeviation = sqrt(sum/((double)cnt)); return sdeviation; } When I cout the result from this function, it gave me NaN. I tested the value of (mean) and data[i] using return data[i] and return mean they are valid. when i replaced mean with an actual number, the operation returned a finite number. but with mean as a variable, it produced NaH. I can't see anything wrong with my code at the moment. Again, I am sure mean, data are getting the right number based on those tests. Thank you

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• What does =*> mean with regards to context free grammars?

  - by incrediman

  I've been reading a couple books/online references about compiler theory, and keep seeing that particular operator coming up every once in a while (as seen here), specifically when the current topic is context free grammars. What does it mean? As well, how does it differ from =>? Explanations with examples distinguishing => from =*> would be most helpful.

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• What does ECONNRESET mean in the context of an AF_LOCAL socket?

  - by Hongli

  I understand that for TCP sockets ECONNRESET has got something to do with RST packets. But I've seen ECONNRESET errors for AF_LOCAL sockets too, on read() and write() calls. What does this mean? How is ECONNRESET different from read() returning 0 or write() throwing EPIPE?

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• "string_name = string_name[3..-1]" what could the following line of ruby code mean?

  - by Mo

  Hi, I'm looking at some external code and saw a line of Ruby code that looks like this string_name = string_name[3..-1] what does the [n..-x] do or mean? Thanks.

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• What does a leading "\??\" on a windows path mean?

  - by kdt

  When using GetModuleFileNameEx to query the image path of a running process, some processes have an image path that starts with "\??\". For example, while most processes start "C:\WINDOWS", some processes start "\??\C:\WINDOWS". What does the leading \??\ mean on a windows path?

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• What does "Controller Key" mean in Interface Builder > Inspector > Bindings?

  - by Thanks

  I can't find in the Docs where they explain all those fields and what they mean. Especially "Controller Key" is not clear to me.

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• What do the columns in the Object Alloc instrument mean?

  - by mystify

  I was unable to find the documentation for this. There is no Quick Info. The columns have these opaque titles: Category Live Bytes # Living # Transitory Overall Bytes # Overall # Allocations (Net / Overall) Is there a document that shows what these columns mean? Without having to read 600 pages?

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• what does a core dump of a C code mean ? And how to read it as its extension is something like .2369

  - by mekasperasky

  what does the extension of the core dump mean and how to read it ? As in when i open the file in text editors i get garbage values .

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• What does $shipping_modules = new shipping($shipping); mean?

  - by OM The Eternity

  What does $shipping_modules = new shipping($shipping); mean? I know its silly but pls help...

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• What does composability mean in context of functional programming?

  - by Surya

  What do functional programmers mean when they say a certain thing is composable or not composable? Some of the statements of this sort that I've read are: Control structures are not composable. Threads do not compose. Monadic operations are composable.

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