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Detecting 'stealth' web-crawlers
What options are there to detect web-crawlers that do not want to be detected?
11 Answers
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subtle differences between JavaScript and Lua [closed]
...he yield keyword inside generators, giving it support for coroutines.
Lua doesn't convert between types for any comparison operators. In JS, only === and !== don't type juggle.
Lua has an exponentiation operator (^); JS doesn't. JS uses different operators, including the ternary conditional operato...
Exit a Script On Error
...side it fails (i.e. as soon as any command returns a nonzero status). This doesn't let you write your own message, but often the failing command's own messages are enough.
The advantage of this approach is that it's automatic: you don't run the risk of forgetting to deal with an error case.
Comman...
What does Redis do when it runs out of memory?
...might be easy question but I am having a hard time finding the answer. How does Redis 2.0 handle running out of maximum allocated memory? How does it decide which data to remove or which data to keep in memory?
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Obtaining a powerset of a set in Java
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@CosminVacaroiu ...what else could it possibly do?
– user253751
Mar 13 '15 at 4:54
3
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Reason to Pass a Pointer by Reference in C++?
...r than the object that the pointer is pointing to.
This is similar to why double pointers are used; using a reference to a pointer is slightly safer than using pointers.
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Is the order of elements in a JSON list preserved?
... "array" come from the conventions of
JavaScript.
Some implementations do also preserve the order of JSON objects as well, but this is not guaranteed.
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POST unchecked HTML checkboxes
...ing the form, disable the hidden input based on the checked condition:
if(document.getElementById("testName").checked) {
document.getElementById('testNameHidden').disabled = true;
}
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Iterate through pairs of items in a Python list [duplicate]
...e to iterate a list in the following way in Python (treat this code as pseudocode)?
5 Answers
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What is more efficient? Using pow to square or just multiply it with itself?
...six_time::microsec_clock::local_time();
}
#define TEST(num, expression) \
double test##num(double b, long loops) \
{ \
double x = 0.0; \
\
boost::posix_time::ptime startTime = now(); \
for (long i=0; i<loops; ++i) \
{ \
x += expression; \
x += expression; \
...