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  • What is the maximum length in seconds to store a value in memcache

    - by Emilien
    The Google App Engine memcache documentation states that the time parameter of memcache.set() is an "Optional expiration time, either relative number of seconds from current time (up to 1 month), or an absolute Unix epoch time." So I tried to set a value for 30 days, which according to Google is 2 592 000 seconds. However, I highly suspect that this value is too high, because the value was set (memcache.set() returned the value True), but a memcache.get() just after always returned None. Reducing this value to 1 728 000 seconds just worked fine/as expected. I guess that once passed the highest value, the time parameter gets interpreted as an absolute Unix epoch time. That would mean that 2 592 000 seconds got interpreted as "Sat, 31 Jan 1970 00:00:00 GMT", which is obviously a date in the past... So what is the highest value you can enter that will get interpreted as a number of seconds in the future?

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  • Function-Local Static Const variable Initialization semantics.

    - by Hassan Syed
    The questions are in bold, for those that cannot be bothered reading a question in depth. This is a followup to this question. It is to do with the initialization semantics of static variables in functions. Static variables should be initialized once, and their internal state might be altered later - as I (currently) do in the linked question. However, the code in question does not require the feature to change the state of the variable later. Let me clarrify my position, since I don't require the string object's internal state to change. The code is for a trait class for meta programming, and as such would would benifit from a const char * const ptr -- thus Ideally a local cost static const variable is needed. My educated guess is that in this case the string in question will be optimally placed in memory by the link-loader, and that the code is more secure and maps to the intended semantics. This leads to the semantics of such a variable "The C++ Programming language Third Edition -- Stroustrup" does not have anything (that I could find) to say about this matter. All that is said is that the variable is initialized once when the flow of control of the thread first reaches the code. This leads me to ponder if the following code would be sensible, and if not what are the intended semantics ?. #include <iostream> const char * const GetString(const char * x_in) { static const char * const x = x_in; return x; } int main() { const char * const temp = GetString("yahoo"); std::cout << temp << std::endl; const char * const temp2 = GetString("yahoo2"); std::cout << temp2 << std::endl; } The following compiles on GCC and prints "yahoo" twice. Which is what I want -- However it might not be standards compliant (which is why I post this question). It might be more elegant to have two functions, "SetString" and "String" where the latter forwards to the first. If it is standards compliant does someone know of a templates implementation in boost (or elsewhere) ?

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  • Need leading zero for batch script using %time% variable

    - by Ira
    Hi, I came across a bug in my DOS script that uses date and time data for file naming. The problem was I ended up with a gap because the time variable didn't automatically provide leading zero for hour < 10. So running echo %time% gives back: ' 9:29:17.88'. Does anyone know of a way to conditionally pad leading zeros to fix this? More info: My filename set command is: set logfile=C:\Temp\robolog_%date:~-4%%date:~4,2%%date:~7,2%_%time:~0,2%%time:~3,2%%time:~6,2%.log which ends up being: C:\Temp\robolog_20100602_ 93208.log (for 9:23 in the morning). This question is related to this one. Thanks

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  • In C#, are event handler arguments covariant?

    - by Roger Lipscombe
    Maybe covariant's not the word, but if I have a class that raises an event, with (e.g.) FrobbingEventArgs, am I allowed to handle it with a method that takes EventArgs? Here's some code: class Program { static void Main(string[] args) { Frobber frobber = new Frobber(); frobber.Frobbing += FrobberOnFrobbing; frobber.Frob(); } private static void FrobberOnFrobbing(object sender, EventArgs e) { // Do something interesting. Note that the parameter is 'EventArgs'. } } internal class Frobber { public event EventHandler<FrobbingEventArgs> Frobbing; public event EventHandler<FrobbedEventArgs> Frobbed; public void Frob() { OnFrobbing(); // Frob. OnFrobbed(); } private void OnFrobbing() { var handler = Frobbing; if (handler != null) handler(this, new FrobbingEventArgs()); } private void OnFrobbed() { var handler = Frobbed; if (handler != null) handler(this, new FrobbedEventArgs()); } } internal class FrobbedEventArgs : EventArgs { } internal class FrobbingEventArgs : EventArgs { } The reason I ask is that ReSharper seems to have a problem with (what looks like) the equivalent in XAML, and I'm wondering if it's a bug in ReSharper, or a mistake in my understanding of C#.

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  • Batch file command line arguments

    - by Hema Joshi
    I want to pass a command as a command line argument from one batch file to another e.g. first.bat call test.bat "echo hello world" "echo welcome " test.bat set initialcommand=%1 set maincommand=%2 %maincommand% %initialcommand%

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  • Passing arguments to commandline with directories having spaces

    - by superstar
    Hi guys, I am making a system call from perl for ContentCheck.pl and passing parameters with directories (having spaces). So I pass them in quotes, but they are not being picked up in the ContentCheck.pl file Random.pm my $call = "$perlExe $contentcheck -t $target_path -b $base_path -o $output_path -s $size_threshold"; print "\ncall: ".$call."\n"; system($call); Contentcheck.pl use vars qw($opt_t $opt_b $opt_o $opt_n $opt_s $opt_h); # initialize getopts('t:b:o:n:s:h') or do{ print "*** Error: Invalid command line option. Use option -h for help.\a\n"; exit 1}; if ($opt_h) {print $UsagePage; exit; } my $tar; if ($opt_t) {$tar=$opt_t; print "\ntarget ".$tar."\n";} else { print " in target"; print "*** Error: Invalid command line option. Use option -h for help.\a\n"; exit 1;} my $base; if ($opt_b) {$base=$opt_b;} else { print "\nin base\n"; print "*** Error: Invalid command line option. Use option -h for help.\a\n"; exit 1;} This is the output in the commandline call: D:\tools\PacketCreationTool/bin/perl/winx64/bin/perl.exe D:/tools/PacketCr eationTool/scripts/ContentCheck.pl -t "C:/Documents and Settings/pkkonath/Deskto p/saved/myMockName.TGZ" -b "input file/myMockName.TGZ" -o myMockName.validate -s 10 target C:/Documents in base *** Error: Invalid command line option. Use option -h for help. Any suggestions are welcome! Thanks.

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  • Setting a variable to undefined

    - by AJ
    Hello, I'm a bit confused about Javascript undefined & null. Firstly what does if (!testvar) actually do? Does it test for undefined and null or just undefined? Secondly, once a variable is defined can I clear it back to undefined (therefore deleting the variable). Thirdly, can I pass undefined as a parameter? e.g: function test(var1, var2, var3) { } test("value1", undefined, "value2") Thanks, AJ

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  • Export enviroment variable Mac

    - by mujer esponja
    Hello, I am starting with spring-roo, so I downloaded it and now I'm trying to export the variable. To get it, I tryed: PATH=$PATH:/Users/myUsr/spring-roo/bin export PATH PATH variable my-Name-3:~ myUsr$ echo $PATH /sw/bin:/sw/sbin:/usr/local/mysql/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/usr/X11R6/bin:/Users/myUsr/spring-roo/bin In this path (/Users/myUsr/spring-roo/bin), there is roo.sh But then, I can not run the command roo as it is suposed to be. Any idea?? Thanks in advance

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  • Returning a complex data type from arguments with Rhino Mocks

    - by Joseph
    I'm trying to set up a stub with Rhino Mocks which returns a value based on what the parameter of the argument that is passed in. Example: //Arrange var car = new Car(); var provider= MockRepository.GenerateStub<IDataProvider>(); provider.Stub( x => x.GetWheelsWithSize(Arg<int>.Is.Anything)) .Return(new List<IWheel> { new Wheel { Size = ?, Make = Make.Michelin }, new Wheel { Size = ?, Make = Make.Firestone } }); car.Provider = provider; //Act car.ReplaceTires(); //Assert that the right tire size was used when replacing the tires The problem is that I want Size to be whatever was passed into the method, because I'm actually asserting later that the wheels are the right size. This is not to prove that the data provider works obviously since I stubbed it, but rather to prove that the correct size was passed in. How can I do this?

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  • dmenu doesn't set environment variable as per my .bash_profile when running Emacs

    - by proofit404
    I have following ~/.bash_profile [[ -f ~/.bashrc ]] && . ~/.bashrc and ~/.bashrc ### Check for shell interactivity. if [[ $- != *i* ]] ; then return fi ### Nyan-cat prompt. PS1="\`if [ \$? = 0 ]; then echo \[\e[35m\]^_^\[\e[0m\]; else echo \[\e[31m\]O_O\[\e[0m\]; fi\` \$ " ### PATH export PATH=$PATH:$HOME/bin So when I run emacs from terminal all OK. When I start it with dmenu (getenv "PATH") and exec-path variable doesn't contain ~/bin directory. When I do it in xfce with xfrun4 command with same bash configuration all seams to work too. What is the problem with dmenu?

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  • Delphi Compiler Directive to Evaluate Arguments in Reverse

    - by Peter Turner
    I was really impressed with this delphi two liner using the IFThen function from Math.pas. However, it evaluates the DB.ReturnFieldI first, which is unfortunate because I need to call DB.first to get the first record. DB.RunQuery('select awesomedata1 from awesometable where awesometableid = "great"'); result := IfThen(DB.First = 0, DB.ReturnFieldI('awesomedata1')); Obviously this isn't such a big deal, as I could make it work with five robust liners. But all I need for this to work is for Delphi to evaluate DB.first first and DB.ReturnFieldI second. I don't want to change math.pas and I don't think this warrants me making a overloaded ifthen because there's like 16 ifthen functions. Just let me know what the compiler directive is, if there is an even better way to do this, or if there is no way to do this and anyone whose procedure is to call db.first and blindly retrieve the first thing he finds is not a real programmer.

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  • Excel - Linking multiple source spreadsheets with variable amounts of rows to a destination spreadsh

    - by Emilio
    I have multiple source spreadsheets, each with a variable number of rows. An example might be one spreadsheet per bank account, with one row for each transaction, with a date and amount. One spreadsheet might have 30 rows, the other 50, and so on. I want to create another spreadsheet which links to the various source spreadsheets and lists an aggregate of all transactions from all sources. So if 3 source sheets with 30, 50 and 20 rows respectively, the destination sheet would have 100 rows. The number of rows (transactions) in the source sheets can grow or shrink over time. I'd like the destination sheet to show one contiguous list of transactions without gaps (spaces). How can I do this?

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  • StackOverflowException in c# when no local variable in the function

    - by dnkulkarni
    when i do this static void Main() { Main(); } I receive stackoverflow exception. As i have read so far about C# they say ONLY local variable of value types (and short living ones) will go on stack. But here in the code there are no local variable to go on stack then what overflows it ? I know from assembly code line Perspective that reference to Main() will go on stack too ? Is that right ?

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  • How are Java ByteBuffer's limit and position variable's updated?

    - by Dummy Derp
    There are two scenarios: writing and reading Writing: Whenever I write something to the ByteBuffer by calling its put(byte[]) method the position variable is incremented as: current position + size of byte[] and limit stays at the max. If, however, I put the data in a view buffer then I will have to, manually, calculate and update the position Before I call the write(ByteBuffer) method of the channel to write something, I will have to flip() the Bytebuffer so that position points to zero and limit points to the last byte that was written to the ByteBuffer. Reading: Whenever I call the read(ByteBuffer) method of a channel to read something, the position variable stays at 0 and the limit variable of the ByteBuffer points to the last byte that was read. So, if the ByteBuffer is smaller than the file being read, the limit variable is pushed to max This means that the ByteBuffer is already flipped and I can proceed to extracting the values from the ByteBuffer. Please, correct me where I am wrong :)

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  • Problem compiling c++ in CodeGear

    - by Carlos
    I have written a C++ program for a University assignment. I used Netbeans 6.8 running on my Mac and the code runs smoothly, no warnings, errors or problems/bugs. However when compiling and running on a Windows computer using CodeGear RAD Studio 2009 (C++ Builder) am getting several errors. [BCC32 Error] main.cpp(51): E2094 'operator<<' not implemented in type 'ostream' for arguments of type 'string' [BCC32 Error] main.cpp(62): E2093 'operator==' not implemented in type 'string' for arguments of the same type [BCC32 Error] main.cpp(67): E2093 'operator==' not implemented in type 'string' for arguments of the same type [BCC32 Error] main.cpp(112): E2093 'operator==' not implemented in type 'string' for arguments of the same type [BCC32 Error] main.cpp(121): E2094 'operator<<' not implemented in type 'ostream' for arguments of type 'string' [BCC32 Error] main.cpp(130): E2093 'operator==' not implemented in type 'string' for arguments of the same type [BCC32 Error] main.cpp(133): E2094 'operator<<' not implemented in type 'ostream' for arguments of type 'string' [BCC32 Error] main.cpp(139): E2094 'operator<<' not implemented in type 'ostream' for arguments of type 'string' [BCC32 Error] main.cpp(153): E2094 'operator<<' not implemented in type 'fstream' for arguments of type 'string' [BCC32 Error] main.cpp(199): E2094 'operator>>' not implemented in type 'fstream' for arguments of type 'string' [BCC32 Error] main.cpp(219): E2094 'operator>>' not implemented in type 'istream' for arguments of type 'string' [BCC32 Error] main.cpp(231): E2094 'operator>>' not implemented in type 'istream' for arguments of type 'string' [BCC32 Error] main.cpp(240): E2094 'operator>>' not implemented in type 'istream' for arguments of type 'string' [BCC32 Error] main.cpp(262): E2094 'operator>>' not implemented in type 'istream' for arguments of type 'string' [BCC32 Error] main.cpp(264): E2094 'operator>>' not implemented in type 'istream' for arguments of type 'string' These are the header files am using #include <iostream> #include <fstream> #include <cmath> #include <stdio> #include <windows> //I added this one just to check and still does not work (I didnt have it on Netbeans/Mac) using namespace std; Any ideas what is producing the errors and how can I fix it?

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  • In C#, are event handler arguments contravariant?

    - by Roger Lipscombe
    If I have a class that raises an event, with (e.g.) FrobbingEventArgs, am I allowed to handle it with a method that takes EventArgs? Here's some code: class Program { static void Main(string[] args) { Frobber frobber = new Frobber(); frobber.Frobbing += FrobberOnFrobbing; frobber.Frob(); } private static void FrobberOnFrobbing(object sender, EventArgs e) { // Do something interesting. Note that the parameter is 'EventArgs'. } } internal class Frobber { public event EventHandler<FrobbingEventArgs> Frobbing; public event EventHandler<FrobbedEventArgs> Frobbed; public void Frob() { OnFrobbing(); // Frob. OnFrobbed(); } private void OnFrobbing() { var handler = Frobbing; if (handler != null) handler(this, new FrobbingEventArgs()); } private void OnFrobbed() { var handler = Frobbed; if (handler != null) handler(this, new FrobbedEventArgs()); } } internal class FrobbedEventArgs : EventArgs { } internal class FrobbingEventArgs : EventArgs { } The reason I ask is that ReSharper seems to have a problem with (what looks like) the equivalent in XAML, and I'm wondering if it's a bug in ReSharper, or a mistake in my understanding of C#.

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  • Java constructor with large arguments or Java bean getter/setter approach

    - by deelo55
    Hi, I can't decide which approach is better for creating objects with a large number of fields (10+) (all mandatory) the constructor approach of the getter/setter. Constructor at least you enforce that all the fields are set. Java Beans easier to see which variables are being set instead of a huge list. The builder pattern DOES NOT seem suitable here as all the fields are mandatory and the builder requires you put all mandatory parameters in the builder constructor. Thanks, D

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  • hiberate named query variable schema name

    - by Sandeep Jindal
    Hi, Other than default schema, for some SQL queries I need to access a particular schema. The issue is that the name of that particular schema is different for different environments. After goggling I found that using this link I am able to specify the schema name in variable. If that’s true that I have following questions: Will that would for SQL queries in the named query? How to set the value for the variable names? Thanks in advance.

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  • Where to export a truly global environment variable?

    - by Socio
    I want to set an environment variable that will be visible to all processes launched by Upstart. This is on a CentOS system, but I presume the same applies to Ubuntu given that they both use Upstart. Somewhere in /etc/init/ perhaps? Note that adding it in /etc/profile.d only applies to login shells. I want all processes (e.g cron, rc.local, etc) to see it. Obviously I'd prefer not to edit existing sys config files if it can be avoided.

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