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Why do objects of the same class have access to each other's private data?

...tatic, compile-time feature. I think it is rather obvious that it is not really possible to implement any meaningful per-object access control at compile time. Only per-class control can be implemented that way. Some hints of per-object control are present in protected access specification, which i...
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Write lines of text to a file in R

... Mark - what If I have several threads all of which I would like to add lines to the same file? (The issue being is that you can't have more then one connection to a file, If I am not mistaken) Thanks. – Tal Galili Mar 18 '1...
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How do I get PHP errors to display?

...ile ( php.ini ) and display_errors is set and also error reporting is E_ALL . I have restarted my Apache webserver. 26 A...
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How do I make Vim do normal (Bash-like) tab completion for file names?

... I personally use set wildmode=longest,list,full set wildmenu When you type the first tab hit, it will complete as much as possible. The second tab hit will provide a list. The third and subsequent tabs will cycle through completio...
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Rails select helper - Default selected value, how?

... edited Jul 23 '16 at 4:13 installero 6,73333 gold badges2828 silver badges3030 bronze badges answered Mar 12 '10 at 17:10 ...
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What is the difference between a 'closure' and a 'lambda'?

... function definition is re-written as binding a lambda to a variable internally. In other languages, like Python, there are some (rather needless) distinctions between them, but they behave the same way otherwise. A closure is any function which closes over the environment in which it was defined. ...
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How to See the Contents of Windows library (*.lib)

... binary interface, this still won't get you return values, parameters, or calling convention. That information isn't encoded in the .lib at all; you have to know that ahead of time (via prototypes in header files, for example) in order to call them correctly. For functions linked with the C++ bina...
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Difference between HashMap, LinkedHashMap and TreeMap

...shMap and TreeMap in Java? I don't see any difference in the output as all the three has keySet and values . What are Hashtable s? ...
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javax.faces.application.ViewExpiredException: View could not be restored

...ession cookie is not maintained anymore for some reason in browser, or by calling HttpSession#invalidate() in server, or due a server specific bug with session cookies as known in WildFly), then the serialized view state is not available anymore in the session and the enduser will get this exception...
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Flexbox Not Centering Vertically in IE

... I found that ie browser have problem to vertically align inner containers, when only the min-height style is set or when height style is missing at all. What I did was to add height style with some value and that fix the issue for me. for example : .outer { ...