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Does the 'mutable' keyword have any purpose other than allowing the variable to be modified by a con

...able of a class with the mutable keyword. As far as I can see it simply allows you to modify a variable in a const method: ...
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How do I show/hide a UIBarButtonItem?

... Save your button in a strong outlet (let's call it myButton) and do this to add/remove it: // Get the reference to the current toolbar buttons NSMutableArray *toolbarButtons = [self.toolbarItems mutableCopy]; // This is how you remove the button from the toolbar and ...
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What version of javac built my jar?

...ersion the class has been compiled FOR, not what version compiled it. Java allows you to compile code so that they're compatible with earlier versions of Java. However, this only applies to byte code and format. It will happily compile code that references JDK 6 libraries into a JDK 5 format, for ex...
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Adding an arbitrary line to a matplotlib plot in ipython notebook

...e taken in account in the legend by adding a label argument starting with "_". Ex: plt.plot([70, 70], [100, 250], 'k-', lw=2, label="_not in legend") – gcalmettes Oct 29 '16 at 5:40 ...
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Why can't variables be declared in a switch statement?

...lity and consistency in the code. In the old days, you might have automatically got an "extra" stack frame, but now that should not be the case for any decent optimizing compiler. – Tall Jeff Sep 18 '08 at 14:37 ...
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Cannot create an array of LinkedLists in Java…?

...nto it. ArrayList will index faster, but Fredrik's solution is better overall. – Steve Zobell Mar 9 '17 at 20:08 add a comment  |  ...
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How do I adjust the anchor point of a CALayer, when Auto Layout is being used?

... is applied.] Autolayout vs. View Transforms Autolayout does not play at all well with view transforms. The reason, as far as I can discern, is that you're not supposed to mess with the frame of a view that has a transform (other than the default identity transform) - but that is exactly what auto...
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Using HTML5/JavaScript to generate and save a file

...me, thanks to Matthew and Dennkster pointing that option out! Here is basically how I do it: 1) get all the content into a string called "content" (e.g. by creating it there initially or by reading innerHTML of the tag of an already built page). 2) Build the data URI: uriContent = "data:applicat...
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How are people managing authentication in Go? [closed]

...-nuts mailing list: https://groups.google.com/forum/#!msg/golang-nuts/GE7a_5C5kbA/fdSnH41pOPYJ This provides a suggested schema and server-side implementation as a basis for custom authentication. The client-side code is still up to you. (I hope the author of the post sees this: Thanks!) Excerpt...
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How to enter in a Docker container already running with a new TTY

... With docker 1.3, there is a new command docker exec. This allows you to enter a running container: docker exec -it [container-id] bash share | improve this answer | ...