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Why would I ever use push_back instead of emplace_back?
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I have thought about this question quite a bit over the past four years. I have come to the conclusion that most explanations about push_back vs. emplace_back miss the full picture.
Last year, I gave a presentation at C++Now on Type Deduction in C...
Difference between getDefaultSharedPreferences and getSharedPreferences
What is the difference between getDefaultSharedPreferences and getSharedPreferences in Android? Can anyone please explain?
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How to get JSON from URL in JavaScript?
This URL returns JSON:
10 Answers
10
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How to write a Python module/package?
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A module is a file containing Python definitions and statements. The file name is the module name with the suffix .py
create hello.py then write the following function as its content:
def helloworld():
print "hello"
Then you ca...
List of macOS text editors and code editors [closed]
I searched for this and found Maudite's question about text editors but they were all for Windows.
39 Answers
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C# switch on type [duplicate]
C# doesn't support switching on the type of an object.
What is the best pattern of simulating this:
5 Answers
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AngularJS - pass function to directive
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To call a controller function in parent scope from inside an isolate scope directive, use dash-separated attribute names in the HTML like the OP said.
Also if you want to send a parameter to your function, call the function by passing an object:
<test color1="color1" update-fn="u...
How can I read inputs as numbers?
... to understand the implication).
Python 2's equivalent of Python 3's input is the raw_input function.
Python 2.x
There were two functions to get user input, called input and raw_input. The difference between them is, raw_input doesn't evaluate the data and returns as it is, in string form. But, i...
When to use “ON UPDATE CASCADE”
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It's true that if your primary key is just a identity value auto incremented, you would have no real use for ON UPDATE CASCADE.
However, let's say that your primary key is a 10 digit UPC bar code and because of expansion, you need to change it to a 13-digit U...
How do I compute derivative using Numpy?
... in a multivariate situation, can take a while.
Symbolic differentiation is ideal if your problem is simple enough. Symbolic methods are getting quite robust these days. SymPy is an excellent project for this that integrates well with NumPy. Look at the autowrap or lambdify functions or check out ...