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How does one capture a Mac's command key via JavaScript?

...is not going to be captured by browsers as such. This is only for the command key on MacOS/keyboards. Unlike Shift/Alt/Ctrl, the Cmd (“Apple”) key is not considered a modifier key—instead, you should listen on keydown/keyup and record when a key is pressed and then depressed based on event...
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Remove all occurrences of a value from a list?

... I wouldn't call this solution the best. List comprehensions are faster and easier to understand while skimming through code. This would rather be more of a Perl way than Python. – Peter Nimroot Aug 13 '16 at 15:25 ...
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What is the difference between getFields and getDeclaredFields in Java reflection

I'm a little confused about the difference between the getFields method and the getDeclaredFields method when using Java reflection. ...
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Read and overwrite a file in Python

... If you don't want to close and reopen the file, to avoid race conditions, you could truncate it: f = open(filename, 'r+') text = f.read() text = re.sub('foobar', 'bar', text) f.seek(0) f.write(text) f.truncate() f.close() The functionality will likely...
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What does get-task-allow do in Xcode?

... entitlements in my iPhone app project, I create a new Entitlements.plist, and set the value of get-task-allow to false. But why? What does this key represent? ...
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What's the difference between a Future and a Promise?

What's the difference between Future and Promise ? They both act like a placeholder for future results, but where is the main difference? ...
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How can I detect when the mouse leaves the window?

...e. The solution below was tested on IE 8.0.6, FireFox 3.6.6, Opera 10.53, and Safari 4 on an MS Windows XP machine. First a little function from Peter-Paul Koch; cross browser event handler: function addEvent(obj, evt, fn) { if (obj.addEventListener) { obj.addEventListener(evt, fn, fals...
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How can I see the request headers made by curl when sending a request to the server?

...very helpful feature of the "verbose" flag: first, it also prints the TLS handshake process when accessing website through HTTPS, such as curl -v https://www.example.com; second, it also prints the CONNECT request if you are visiting the site through HTTP proxy, such as curl --proxy my-proxy:8080 ht...
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Eclipse Android and gitignore

...itHub, it also includes amongst other things the .project, I disagree here and want your opinion. Scenario: I added new classes to my project. When I pulled from another machine, they were not in the project. Please check it out: github.com/github/gitignore/blob/master/Global/… ...
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What is the difference between is_a and instanceof?

I am aware that instanceof is an operator and that is_a is a method. 9 Answers 9 ...