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What's the difference between Cache-Control: max-age=0 and no-cache?
...no-cache tells them they MUST revalidate before using a cached copy. From 14.9.1 What is Cacheable:
no-cache
...a cache MUST NOT use the response
to satisfy a subsequent request
without successful revalidation with
the origin server. This allows an
origin server to prevent caching...
How many GCC optimization levels are there?
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142
To be pedantic, there are 8 different valid -O options you can give to gcc, though there are s...
Checking if an instance's class implements an interface?
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edited May 14 '17 at 11:33
Tomáš Votruba
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Showing all errors and warnings [duplicate]
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1194
Display errors could be turned off in the php.ini or your Apache configuration file.
You can ...
How to add/update an attribute to an HTML element using JavaScript?
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163
You can read here about the behaviour of attributes in many different browsers, including IE.
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What is so special about Generic.xaml?
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154
Every Control in WPF has a default Style that provides, among other things, the Control's defa...
visual c++: #include files from other projects in the same solution
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201
Settings for compiler
In the project where you want to #include the header file from another pr...
A migration to add unique constraint to a combination of columns
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251
add_index :people, [:firstname, :lastname, :dob], :unique => true
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Qt: *.pro vs *.pri
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edited May 24 '14 at 13:35
answered Dec 2 '11 at 15:31
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What is the meaning of id?
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122
id is a pointer to any type, but unlike void * it always points to an Objective-C object. For ...