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Big-O for Eight Year Olds? [duplicate]
I'm asking more about what this means to my code. I understand the concepts mathematically, I just have a hard time wrapping my head around what they mean conceptually. For example, if one were to perform an O(1) operation on a data structure, I understand that the number of operations it has to p...
How do I safely pass objects, especially STL objects, to and from a DLL?
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The short answer to this question is don't. Because there's no standard C++ ABI (application binary interface, a standard for calling conventions, data packing/alignment, type size, etc.), you will have to jump through a lot of hoops to try and en...
Why is char[] preferred over String for passwords?
...present anywhere in the system, even before garbage collection.
So yes, this is a security concern - but even using char[] only reduces the window of opportunity for an attacker, and it's only for this specific type of attack.
As noted in the comments, it's possible that arrays being moved by the ...
What does string::npos mean in this code?
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It means not found.
It is usually defined like so:
static const size_t npos = -1;
It is better to compare to npos instead of -1 because the code is more legible.
share
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Does Typescript support the ?. operator? (And, what's it called?)
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Update: it is supported as of TypeScript 3.7 and called Optional chaining: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-7.html#optional-chaining
I can't find any reference to it whatsoever in the TypeScript l...
JavaScript for detecting browser language preference [duplicate]
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I think the main problem here is that the browser settings don't actually affect the navigator.language property that is obtained via javascript.
What they do affect is the HTTP 'Accept-Language' header, but it appears this value is not available throug...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
....53s 1.52s -Os
In some cases you can alleviate the effect of disadvantageous optimizations by asking gcc to optimize for your particular processor (using options -mtune=native or -march=native):
Processor Compiler Time (-O2 -mtune=native) Time (-Os -mtune=native)
AMD FX-63...
What is an anti-pattern?
...nd are undesirable.
For example, in object-oriented programming, the idea is to separate the software into small pieces called objects. An anti-pattern in object-oriented programming is a God object which performs a lot of functions which would be better separated into different objects.
For examp...
What's so great about Lisp? [closed]
I don't know enough Lisp to say whether it's good or bad. It seems like everyone who has used Lisp loves it, yet the most popular languages these days are descended from C.
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How do I check if a string is unicode or ascii?
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In Python 3, all strings are sequences of Unicode characters. There is a bytes type that holds raw bytes.
In Python 2, a string may be of type str or of type unicode. You can tell which using code something like this:
def whatisthis(s):
if isinstance(s, str):
print "ordinary str...