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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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A html space is showing as %2520 instead of %20

...e using) double encoding characters? Edit: Expanding a bit on this, especially for LOCAL links. Assuming you want to link to the resource C:\my path\my file.html: if you provide a local file path only, the browser is expected to encode and protect all characters given (in the above, you should gi...
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How to clone a case class instance and change just one field in Scala?

...lippe PelletJean-Philippe Pellet 55k1717 gold badges160160 silver badges220220 bronze badges add a comment ...
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How to send email via Django?

...self an email! The above article mentioned by miku was perfect. Note the small typo correction in the comments of the article. (And I just used my regular computer/localhost. I had not set anything else up before hand.) – user984003 Oct 24 '12 at 16:11 ...
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Set folder browser dialog start location

...ally when shown? – JoBaxter Sep 14 '16 at 23:06 2 This is however not the same as setting RootFol...
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python-pandas and databases like mysql

...rame from it. SQLAlchemy makes it easier to combine SQL conditions Pythonically if you intend to mix and match things over and over. from sqlalchemy.ext.declarative import declarative_base from sqlalchemy import Table from sqlalchemy import create_engine from sqlalchemy.orm import sessionmaker from...
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How to stop/terminate a python script from running?

... You can also do it if you use the exit() function in your code. More ideally, you can do sys.exit(). sys.exit() which might terminate Python even if you are running things in parallel through the multiprocessing package. Note: In order to use the sys.exit(), you must import it: import sys ...
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Is a URL allowed to contain a space?

Is a URI (specifically an HTTP URL) allowed to contain one or more space characters? If a URL must be encoded, is + just a commonly followed convention, or a legitimate alternative? ...
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Why is the asterisk before the variable name, rather than after the type?

...ered Dec 29 '08 at 19:28 luiscuballuiscubal 22.9k77 gold badges5050 silver badges8282 bronze badges ...
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What is the difference between currying and partial application?

...ints that other peoples examples of currying are not currying, but are actually just partial application. 14 Answers ...