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Error : The service is invalid

...to clear the DerivedData as @AminNegm-Awad mentioned. I restarted IDE too, now it's all fine. Superb answer and comments! – Vijay Kumar Kanta Apr 10 '19 at 12:25 2 ...
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How can I check the extension of a file?

...rmalise it to lowercase. ext = os.path.splitext(fp)[-1].lower() # Now we can simply use == to check for equality, no need for wildcards. if ext == ".mp3": print fp, "is an mp3!" elif ext == ".flac": print fp, "is a flac file!" else: print fp, "is an unkno...
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What does the question mark and the colon (?: ternary operator) mean in objective-c?

... (defo my favourite) but never knew what it's called. the big question has now been answered. Thanks – Thang Do Nov 10 '15 at 7:50 ...
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Canvas width and height in HTML5

... Thx much appreciated. I see now what CSS is doing... it treats the canvas 'like' a image, scaling an image is obviously not as good as 're-drawing' it! – EnglishAdam Sep 11 '14 at 18:32 ...
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Paused in debugger in chrome?

... sometimes you should know where to click. – Darshan Thanki Nov 5 '12 at 16:44 ...
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How to create a HTTP server in Android? [closed]

...ir . For example I am copying a file named f1 in homeDir (using javacode). Now the file copying is in progress and if some one send request for the file f1 Can server will process the request? – Ashwin N Bhanushali Mar 29 '13 at 9:44 ...
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Get class name using jQuery

... But what if you don't know the classname? ;-) – Potherca Jun 11 '11 at 20:41 10 ...
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Is there a unique Android device ID?

... It's known to be null sometimes, it's documented as "can change upon factory reset". Use at your own risk, and it can be easily changed on a rooted phone. – Seva Alekseyev Jun 23 '10 at 14:21 ...
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Run ssh and immediately execute command [duplicate]

...tory will be cleared, except for the new command on a fresh login. Do you know why that happens and how you can prevent that? I just noticed that after I commented out the line in .bashrc the full history is now available. – Andy Jul 22 '16 at 6:19 ...
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C# getting its own class name

... If you're in a static method then the developer knows what the name of the type is. You can just type it in as a string in the source code. – Eric Lippert Jan 22 '10 at 0:33 ...