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'and' (boolean) vs '&' (bitwise) - Why difference in behavior with lists vs numpy arrays?
...erator works.
x and y =>
if x is false, then x, else y
So in other words, since mylist1 is not False, the result of the expression is mylist2. (Only empty lists evaluate to False.)
Example 2:
The & operator is for a bitwise and, as you mention. Bitwise operations only work on numbers. ...
Do fragments really need an empty constructor?
...ead the short javadoc of Parcelable, and a part of Parcel not far past the word "reconstructed", I had not reached the "Active Objects" part, concluding that it was just a low-level more optimized but less versatile Serializable. I hereby don the hat of shame and mumble "Still can't share nonparcela...
How line ending conversions work with git core.autocrlf between different operating systems
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Shorty summary in words: Files with CR alone are never touched. false never touches line endings. true always commits as LF and checks out as CRLF. And input always commits as LF and checks out as-is.
– Furkan Kambay
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Javascript when to use prototypes
...ion() { ... }
};
duck.quack(); // we're satisfied it's a duck!
In other words, if each "type" of object has its own definitions of the "methods", then there is no value in inheriting from a prototype. After that, it depends on how many instances you allocate of each type. But in many modular desi...
When should I use a struct rather than a class in C#?
...e more expensive to pass around than class references (usually one machine word), so classes could end up being faster in practice.
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Checking in of “commented out” code [closed]
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"Never" is rarely a good word to use in guidelines.
Your colleague has a great example of when it might be appropriate to check in code that is commented out: When it is incomplete and might break the application if checked in while active.
For the...
What do hjust and vjust do when making a plot using ggplot?
...racters, they're neither aligned justified to the right or the left of the word boundaries. Take a look at the axes here If I were to use angle=45, how would I make them right-justified and flush against the axis?
– William Gunn
Sep 1 '11 at 19:11
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Does C++ support 'finally' blocks? (And what's this 'RAII' I keep hearing about?)
...a syntax make it a little noisy (in my example in the fourth line only the word finally and the {}-block on the right are meaningful, the rest is essentially noise).
Another example:
[...]
auto precision = std::cout.precision();
auto set_precision_back = finally( [precision, &std::cout]() { s...
When to use , tag files, composite components and/or custom components?
...Tarik: composites have a lot of overhead as compared to tagfiles. In other words: poor performance. Use it only if you need to create a single custom UI component based on a set of closely related existing components. This can't be done with a tagfile. ZEEF.com, for example has only one composite: t...
How can bcrypt have built-in salts?
Coda Hale's article "How To Safely Store a Password" claims that:
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