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How to add an Access-Control-Allow-Origin header

...als: "true" header. Instead, they want you to allow their origin specifically. If you still want to allow all origins, you can do some simple Apache magic to get it to work (make sure you have mod_headers enabled): Header set Access-Control-Allow-Origin "%{HTTP_ORIGIN}e" env=HTTP_ORIGIN Brows...
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What does @hide mean in the Android source code?

...e); } return PackageManager.PERMISSION_DENIED; } However, we can call it by reflection: Class c; c = Class.forName("android.app.ActivityManager"); Method m = c.getMethod("checkUidPermission", new Class[] {String.class, int.class}); Object o = m.invoke(null, new Object[]{"android.permissi...
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What is the difference between onPause() and onStop() of Android Activites?

.../android/app/Activity.html , it said 'Activity comes into foreground' will call onPause() , and 'Activity is no longer visible' will call onStop() . ...
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Static methods - How to call a method from another method?

When I have regular methods for calling another method in a class, I have to do this 6 Answers ...
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How exactly does tail recursion work?

...ent one but without explicit recursion (that is, without explicit function calls). If you change the logic into something non-equivalent, you may indeed make the function loop forever in some or all cases. – Alexey Frunze Mar 20 '13 at 9:30 ...
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Unknown column in 'field list' error on MySQL Update query

... Try using different quotes for "y" as the identifier quote character is the backtick (“`”). Otherwise MySQL "thinks" that you point to a column named "y". See also MySQL 5 Documentation ...
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How do I escape a single quote?

...ML document that was using single-quotes arround attributes values ; so I didn't think this was actually valid ;; I just (once again) learnt something while answering a question ; so, thanks for those comments ! – Pascal MARTIN Mar 11 '10 at 21:08 ...
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Generate .pem file used to set up Apple Push Notifications

...tribution section, then click "Continue" button. Step 3: Select the App ID you want to use for your BYO app (How to Create An App ID), then click "Continue" to go to next step. Step 4: Follow the steps "About Creating a Certificate Signing Request (CSR)" to create a Certificate Signing Request...
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What are the best practices for using a GUID as a primary key, specifically regarding performance?

I have an application that uses GUID as the Primary Key in almost all tables and I have read that there are issues about performance when using GUID as Primary Key. Honestly, I haven't seen any problem, but I'm about to start a new application and I still want to use the GUIDs as the Primary Keys, b...
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Focus Input Box On Load

...load? You can just add the autofocus attribute to the input. <input id="myinputbox" type="text" autofocus> However, this might not be supported in all browsers, so we can use javascript. window.onload = function() { var input = document.getElementById("myinputbox").focus(); } 2) How...