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HashMap get/put complexity
...1). However it depends on the hash implementation. The default object hash is actually the internal address in the JVM heap. Are we sure it is good enough to claim that the get/put are O(1) ?
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How is a CRC32 checksum calculated?
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The polynomial for CRC32 is:
x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7 + x5 + x4 + x2 + x + 1
Wikipedia
CRC calculation
Or in hex and binary:
0x 01 04 C1 1D B7
1 0000 0100 1100 0001 0001 1101 1011 0111
The highest term ...
c++11 Return value optimization or move? [duplicate]
... method:
Foo f()
{
Foo result;
mangle(result);
return result;
}
This will already allow the use of the move constructor, if one is available. In fact, a local variable can bind to an rvalue reference in a return statement precisely when copy elision is allowed.
Your second version actively...
Is short-circuiting logical operators mandated? And evaluation order?
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using the built-in meaning of the operators in these expressions, there is a sequence point after the evaluation of the first expression (12).
In C++ there is an extra trap: short-circuiting does NOT apply to types that overload operators || and &&.
Footnote 12: The operators indica...
In C++, is it still bad practice to return a vector from a function?
...rn large objects—such as vectors/arrays—in many programming languages. Is this style now acceptable in C++0x if the class has a move constructor, or do C++ programmers consider it weird/ugly/abomination?
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What is LDAP used for?
I know that LDAP is used to provide some information and to help facilitate authorization.
16 Answers
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What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … }
...ng a lot of Javascript lately and I have been noticing that the whole file is wrapped like the following in the .js files to be imported.
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How to avoid null checking in Java?
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This to me sounds like a reasonably common problem that junior to intermediate developers tend to face at some point: they either don't know or don't trust the contracts they are participating in and defensively overcheck for n...
Why it's not possible to use regex to parse HTML/XML: a formal explanation in layman's terms
There is no day on SO that passes without a question about parsing (X)HTML or XML with regular expressions being asked.
9 ...
AngularJS : Difference between the $observe and $watch methods
...ing in $scope changes in AngularJS. But couldn't understand what exactly is the difference between the two.
4 Answers
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