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What's the difference between a Python “property” and “attribute”?
...spam = SomeObject()
print(spam.eggs)
it looks up eggs in spam, and then examines eggs to see if it has a __get__, __set__, or __delete__ method — if it does, it's a property. If it is a property, instead of just returning the eggs object (as it would for any other attribute) it will call th...
Why do I have to access template base class members through the this pointer?
If the classes below were not templates I could simply have x in the derived class. However, with the code below, I have to use this->x . Why?
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What is duck typing?
...ong typing.
The idea is that you don't need a type in order to invoke an existing method on an object - if a method is defined on it, you can invoke it.
The name comes from the phrase "If it looks like a duck and quacks like a duck, it's a duck".
Wikipedia has much more information.
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Difference between 3NF and BCNF in simple terms (must be able to explain to an 8-year old)
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Your pizza can have exactly three topping types:
one type of cheese
one type of meat
one type of vegetable
So we order two pizzas and choose the following toppings:
Pizza Topping Topping Type
-------- ---------- -------------
1 ...
Reverse of JSON.stringify?
...se a string into JSON
document.body.innerHTML += obj.hello;
} catch (ex) {
console.error(ex);
}
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Getting LaTeX into R Plots
I would like to add LaTeX typesetting to elements of plots in R (e.g: the title, axis labels, annotations, etc.) using either the combination of base/lattice or with ggplot2 .
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Why avoid increment (“++”) and decrement (“--”) operators in JavaScript?
...o some programmers and is just not worth it in my view. For loops are an exception, as the use of the increment operator is idiomatic and thus always clear.
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What is “X-Content-Type-Options=nosniff”?
...specting this header, including Chrome/Chromium, Edge, IE >= 8.0, Firefox >= 50 and Opera >= 13. See :
https://blogs.msdn.com/b/ie/archive/2008/09/02/ie8-security-part-vi-beta-2-update.aspx?Redirected=true
Sending the new X-Content-Type-Options response header with the value
nosniff ...
Adding a column to a data.frame
...s. The quotes below come from the "Details" section of the relevant help text, [[.data.frame.
Data frames can be indexed in several modes. When [ and [[ are used with a single vector index (x[i] or x[[i]]), they index the data frame as if it were a list.
my.dataframe["new.col"] <- a.vector
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How do I check if a variable exists in a list in BASH
...k the validity of a user input.
I want to match the input (say variable x ) to a list of valid values.
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