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Understanding dict.copy() - shallow or deep?

...mple: original = dict(a=1, b=2, c=dict(d=4, e=5)) new = original.copy() Now let's change a value in the 'shallow' (first) level: new['a'] = 10 # new = {'a': 10, 'b': 2, 'c': {'d': 4, 'e': 5}} # original = {'a': 1, 'b': 2, 'c': {'d': 4, 'e': 5}} # no change in original, since ['a'] is an immutabl...
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How do I write the 'cd' command in a makefile?

...t everybody works on legacy makefiles, and even then this answer is about knowing this possibility exists. – Chnossos May 20 '17 at 14:52 1 ...
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Using Python 3 in virtualenv

... location related concerns, relocatable was removed as an option.... is it now unnecessary? is their a workaround? or is it just now completely useless to prepare an app? – J. M. Becker Sep 27 '16 at 21:33 ...
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nodeJs callbacks simple example

...llback = function(data) { console.log('got data: '+data); }; var usingItNow = function(callback) { callback('get it?'); }; Now open node or browser console and paste the above definitions. Finally use it with this next line: usingItNow(myCallback); With Respect to the Node-Style Error Con...
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How can I use a carriage return in a HTML tooltip?

..., and I'd like (without having to resort to a whizz-bang jQuery plugin, I know there are many!) to use carriage returns to format the tooltip. ...
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What is function overloading and overriding in php?

...ue; $a=doSomething(); Each variable is of a different type, yet you can know the type before execution (see the 4th one). As a comparison, other languages use: int a=1; String s="1"; bool a=true; something a=doSomething(); In the last example, you must forcefully set the variable's type (as an ...
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Advantage of switch over if-else statement

...Obviously this just moves the problem to a different area of the code, but now you have the opportunity to reuse this test. You also have more options for how to solve it. You could use std::set, for example: bool RequiresSpecialEvent(int numError) { return specialSet.find(numError) != specia...
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What does |= (ior) do in Python?

...search |= so I'm having trouble finding relevant documentation. Anybody know? 8 Answers ...
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How can I change the color of a Google Maps marker?

... Material Design EDITED MARCH 2019 now with programmatic pin color, PURE JAVASCRIPT, NO IMAGES, SUPPORTS LABELS no longer relies on deprecated Charts API var pinColor = "#FFFFFF"; var pinLabel = "A"; // Pick your pin (hole or no hole) var ...
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Executing Shell Scripts from the OS X Dock?

... You don't happen to know if there is an easy way to have files passed as arguments to the shell script? For files opened using "open with...". – Fuzzy76 Jun 14 '11 at 12:05 ...