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How to check file MIME type with javascript before upload?

...xhr.onload = function() { callback(url, xhr.response); }; xhr.onerror = function() { alert('A network error occurred!'); }; xhr.send(); } function headerCallback(url, headerString) { printHeaderInfo(url, headerString); } function remoteCallback(url, blob) { printI...
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Check for internet connection availability in Swift

...nnection.sendSynchronousRequest(request, returningResponse: &response, error: nil) as NSData? if let httpResponse = response as? NSHTTPURLResponse { if httpResponse.statusCode == 200 { Status = true } } return Status } } And then you can check intern...
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How to set versionName in APK filename using gradle?

... @PHPirate: almost works: Error:(34, 0) Cannot set the value of read-only property 'name' – Mooing Duck Dec 10 '17 at 2:11 ...
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Get type name without full namespace

... nameof(z) -> "z" // inside of Method2 ok, inside Method1 is a compiler error nameof(Stuff) = "Stuff" nameof(T) -> "T" // works inside of method but not in attributes on the method nameof(f) -> “f” nameof(f<T>) -> syntax error nameof(f<>) -> syntax error na...
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How to use background thread in swift?

... I am using your code in xCode 6.0.1 and ios 8.It gives error as "QOS_CLASS_BACKGROUND" return class and it is of type UInt32 and "dispatch_get_global_queue" requires 1st parameter as int so type error is coming. – Zalak Patel Oct 29 '14 at 1...
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Why do I get TypeError: can't multiply sequence by non-int of type 'float'?

... I learned to read the syntax error before posting here and using Google. I was trying to convert the raw_input for salesAmount to an int rather than a float. Do you know why int will not work, but rather float would? Bare with me, lol. ...
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How to print to the console in Android Studio?

...nd specify the category of message. The main options are: DEBUG: Log.d ERROR: Log.e INFO: Log.i VERBOSE: Log.v WARN: Log.w You print a message by using a Log statement in your code, like the following example: Log.d("myTag", "This is my message"); Within Android Studio, you can search for...
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How to fix “no valid 'aps-environment' entitlement string found for application” in Xcode 4.3?

...ovisioning profile will be copied to the app. Given that you still see an error message about missing entitlements, I can only assume the code signing options are not correct in the build settings. You need to make sure the correct profile is selected for the "Debug" configuration, and to be safe,...
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UIScrollView Scrollable Content Size Ambiguity

... This error took me a while to track down, initially I tried pinning the ScrollView's size but the error message clearly says "content size". I made sure everything I pinned from the top of the ScrollView was also pinned to the bo...
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Scala: List[Future] to Future[List] disregarding failed futures

...Result(true) { futureValue match { case Some(Success(Failure(error: IllegalStateException))) => true } } } test("Future.allAsTrys returns Nil given Nil list as input") { val future = Future.allAsTrys(Nil) assert ( Await.result(future, 100 nanosecond).isEmpty ...