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“[notice] child pid XXXX exit signal Segmentation fault (11)” in apache error.log [closed]
... Hmm thats weird. Can you make sure that the process that segfaults actually is the on you are attached gdb to? check dmesg for the pid of the segfaulted process.
– Mattias Wadman
Aug 19 '12 at 19:54
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How to print a debug log?
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+1 It took me too long to find this answer. This is all I really was looking for. I couldn't figure out how to see what my array contained (working in Drupal).
– SteveS
May 7 '14 at 14:31
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How do you reindex an array in PHP?
...ollowing array, which I would like to reindex so the keys are reversed (ideally starting at 1):
21 Answers
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Listing only directories in UNIX
... of ls isn't used. Similar to the behaviour of ls *php and how it displays all files ending with php in a directory.
– David Hancock
Oct 18 '13 at 15:24
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Understanding “randomness”
...iable or its multiplication, you should be aware that while Random() is usually uniformly distributed, Random() * Random() is not.
Example
This is a uniform random distribution sample simulated through a pseudo-random variable:
BarChart[BinCounts[RandomReal[{0, 1}, 50000], 0.01]]
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What is the point of noreturn?
...n attribute is supposed to be used for functions that don't return to the caller. That doesn't mean void functions (which do return to the caller - they just don't return a value), but functions where the control flow will not return to the calling function after the function finishes (e.g. function...
Why isn't std::initializer_list a language built-in?
...se, you already need to include a standard header in order to use this so-called "core language" feature.
Now, for initializer lists it happens that no keyword is needed to generate the object, the syntax is context-sensitive curly braces. Aside from that it's the same as type_info. Personally I do...
elasticsearch v.s. MongoDB for filtering application [closed]
...to elastic. Our use case differs from yours in that our Mongo data changes all the time: a record, or a subset of the fields of a record, can be updated several times a day and this can call for re-indexing of that record to elastic. For that reason alone, using elastic as the sole data store is not...
Converting bytes to megabytes
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Traditionally by megabyte we mean your second option -- 1 megabyte = 220 bytes. But it is not correct actually because mega means 1 000 000. There is a new standard name for 220 bytes, it is mebibyte (http://en.wikipedia.org/wiki/Mebi...
Can a foreign key be NULL and/or duplicate?
...at field must exist first in a different table (the parent table). That is all an FK is by definition. Null by definition is not a value. Null means that we do not yet know what the value is.
Let me give you a real life example. Suppose you have a database that stores sales proposals. Suppose furth...