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“Wrong type argument: commandp” error when binding a lambda to a key

... I think there are no down sides. From the documentation: >> The "call" to ‘interactive’ is actually a declaration rather than a function; it tells ‘call-interactively’ how to read arguments to pass to the function. When actually called, ‘interactive’ just returns nil. ...
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What is the difference between named and positional parameters in Dart?

...uss the similarities. Dart's optional parameters are optional in that the caller isn't required to specify a value for the parameter when calling the function. Optional parameters can only be declared after any required parameters. Optional parameters can have a default value, which is used when ...
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What is the HEAD in git?

...te branch, why do you end up with a "detached HEAD". Why don't you automatically jump in the branch in your local repo that correspond to your remote? – e-satis Mar 27 '10 at 16:31 ...
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Error 1022 - Can't write; duplicate key in table

...boy with a foreign key X The next constraint with the foreign key X can be called boy1 I'm sure you'd figure out better names than I did. ???? share | improve this answer | ...
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How are POST and GET variables handled in Python?

... I am trying to call a method in a cgi file. An example url is http://www.myserver.com/cgi-bin/cgi.py/ThisIsMyMethod. The following environmental variables are related: os.environ.get('PATH_INFO') which gets the method name (eg: /ThisIsMyMet...
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Qt: How do I handle the event of the user pressing the 'X' (close) button?

...t(); } } If you're subclassing a QDialog, the closeEvent will not be called and so you have to override reject(): void MyDialog::reject() { QMessageBox::StandardButton resBtn = QMessageBox::Yes; if (changes) { resBtn = QMessageBox::question( this, APP_NAME, ...
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JavaScript inheritance: Object.create vs new

...erty that is not inherited from the super implementation, you just need to call super in the child's constructor: SomeBaseClass.call(this). Check this fiddle: jsfiddle.net/NhQGB – ChrisRich Oct 28 '12 at 10:08 ...
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Creating threads - Task.Factory.StartNew vs new Thread()

...at sentence was a little bit too coarse. Synchronous execution of tasks is called inlining. When scheduling a task on the threadpool (default scheduler) from the UI Thread it will not occur. It will only occur if the ambient scheduler ('TaskScheduler.Current') is the same as the scheduler of a task ...
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Non-Singleton Services in AngularJS

...ory); } then in your consumer instance you need the factory service and call the build method on the factory to get a new instance when you need it class CollectionController { public model: admin.factories.IModel; static $inject = ['$log', '$routeParams', 'admin.services.Collection'...
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How to pass a class type as a function parameter

I have a generic function that calls a web service and serialize the JSON response back to an object. 6 Answers ...