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How can i tell if an object has a key value observer attached

...SMutableArray like this: - (void)addObservedObject:(id)object { if (![_observedObjects containsObject:object]) { [_observedObjects addObject:object]; } } If you want to unobserve the objects you can do something like: for (id object in _observedObjects) { if ([object isKindOf...
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UITableViewCell, show delete button on swipe

...ource = self } // number of rows in table view func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return self.animals.count } // create a cell for each table view row func tableView(_ tableView: UITableView, cellForRowAt indexPa...
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ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known

...rite out my router's port forwarding settings. (ApplicationTextField)_ssh     (external port)_22     (Internal Port)_22     (Protocal)_Both     (To IP Address)_192.168.1.###     (Enabled)_checkBox Port forwarding settings can be different for different routers though, so look ...
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Among $_REQUEST, $_GET and $_POST which one is the fastest?

... $_REQUEST, by default, contains the contents of $_GET, $_POST and $_COOKIE. But it's only a default, which depends on variables_order ; and not sure you want to work with cookies. If I had to choose, I would probably not us...
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How to set Java environment path in Ubuntu

...le /etc/profile sudo gedit /etc/profile Add following lines in end JAVA_HOME=/usr/lib/jvm/jdk1.7.0 PATH=$PATH:$HOME/bin:$JAVA_HOME/bin export JAVA_HOME export JRE_HOME export PATH Then Log out and Log in ubuntu for setting up the paths... ...
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An error occurred while validating. HRESULT = '8000000A'

...n try to change the DWORD value for the following registry value to 0: HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\12.0_Config\MSBuild\EnableOutOfProcBuild (VS2013) or HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\14.0_Config\MSBuild\EnableOutOfProcBuild (VS2015) If this doesn't exi...
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Mocking Extension Methods with Moq

... DoWorkMethod { [ExcludeFromCodeCoverage] get { return _DoWorkMethod ?? (_DoWorkMethod = (obj, val) => { return obj.DoWork(val); }); } set { _DoWorkMethod = value; } } private Func<IMyObject, string, object> _DoWorkMethod; Then you call the Func instead of ...
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Windows batch: echo without new line

...d $write.special ( <nul set /p "=!%~1!" exit /b ) >"%$write.temp%_1.txt" (echo !str!!$write.sub!) copy "%$write.temp%_1.txt" /a "%$write.temp%_2.txt" /b >nul type "%$write.temp%_2.txt" del "%$write.temp%_1.txt" "%$write.temp%_2.txt" set "str2=!str:*%$write.sub%=%$write.sub%!" if "!str2!...
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Use ASP.NET MVC validation with jquery ajax?

...alidation Resources http://msdn.microsoft.com/en-us/vs2010trainingcourse_aspnetmvccustomvalidation_topic5.aspx Server Side NOTE: This is only for additional server side validation on top of jQuery.validation library Perhaps something like this could help: [ValidateAjax] public JsonResult Edi...
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C# 4.0 optional out/ref arguments

...lify: // new overload public bool SomeMethod() { return SomeMethod(out _); // declare out as an inline discard variable } (Thanks @Oskar / @Reiner for pointing this out.) share | improve thi...