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Static variable inside of a function in C
...ists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.
The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs ...
Get the name of an object's type
... = 1;}
function b() { this.bar = 2; }
b.prototype = new a(); // b inherits from a
Things now don't work as you might expect them to:
var f = new b(); // instantiate a new object with the b constructor
(f.constructor == b); // false
(f.constructor == a); // true
So, you might get unexpected results...
Why would you use an ivar?
...hiving/serialization implementations.
It's also more frequent as one moves from the everything has a public readwrite accessor mindset to one which hides its implementation details/data well. Sometimes you need to correctly step around side effects a subclass' override may introduce in order to do t...
What requests do browsers' “F5” and “Ctrl + F5” refreshes generate?
...the same page even if the content is changed, because it may load the page from cache. But Ctrl-F5 forces a cache refresh, and will guarantee that if the content is changed, you will get the new content.
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How can I pass a member function where a free function is expected?
...and call your member through a forwarding function which obtains an object from the void* and then calls the member function.
In a proper C++ interface you might want to have a look at having your function take templated argument for function objects to use arbitrary class types. If using a templat...
Setting a property by reflection with a string value
...ou may need to write special case logic if you want to support conversions from types that are not IConvertible.
The corresponding code (without exception handling or special case logic) would be:
Ship ship = new Ship();
string value = "5.5";
PropertyInfo propertyInfo = ship.GetType().GetProperty(...
How to debug Ruby scripts [closed]
I copied the following Ruby code from the Internet and made a few changes but it doesn't work.
17 Answers
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Ajax using https on an http page
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Add the Access-Control-Allow-Origin header from the server
Access-Control-Allow-Origin: https://www.mysite.com
http://en.wikipedia.org/wiki/Cross-Origin_Resource_Sharing
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Why can't I use the 'await' operator within the body of a lock statement?
The await keyword in C# (.NET Async CTP) is not allowed from within a lock statement.
8 Answers
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What's quicker and better to determine if an array key exists in PHP?
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Up from the dead... but I also re-ran the benchmark, and made a tweak so the second for loop has to initialize it's own counter and to clear the result array. It shows "isset || null" being faster. codepad.org/Np6oPvgS
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