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HEAD and ORIG_HEAD in Git
..., ORIG_HEAD is last value of HEAD before dangerous operation).
For more information read git(1) manpage, Git User's Manual, the Git Community Book and Git Glossary
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Private virtual method in C++
...s that the C++ FAQ Lite has since changed its recommendation: "the C++ FAQ formerly recommended using protected virtuals rather than private virtuals. However the private virtual approach is now common enough that confusion of novices is less of a concern."
– Zack The Human
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How can I export tables to Excel from a webpage [closed]
...xport tables to Excel from a webpage. I want the export to contain all the formatting and colours.
14 Answers
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Create the perfect JPA entity [closed]
.../ empty fields on proxy instances.
Protected is better for (Hibernate) performance?
Unlikely.
Equals/HashCode?
This is relevant to working with entities, before they've been saved -- which is a thorny issue. Hashing/comparing on immutable values? In most business applications, there aren't any.
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Why should I prefer single 'await Task.WhenAll' over multiple awaits?
...ng is that the main reason to prefer Task.WhenAll to multiple awaits is performance / task "churning": the DoWork1 method does something like this:
start with a given context
save the context
wait for t1
restore the original context
save the context
wait for t2
restore the original context
save th...
In Visual Studio C++, what are the memory allocation representations?
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This link has more information:
http://en.wikipedia.org/wiki/Magic_number_(programming)
* 0xABABABAB : Used by Microsoft's HeapAlloc() to mark "no man's land" guard bytes after allocated heap memory
* 0xABADCAFE : A startup to this value to in...
WSDL vs REST Pros and Cons
...s long as they specify a version). REST essentially requires HTTP, and is format-agnostic(meaning you can use XML, JSON, HTML, whatever).
Generally I use REST, because I don't need fancy WS-* features. SOAP is good though if you want computers to understand your webservice using a WSDL. REST spe...
How do malloc() and free() work?
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@Juergen But when free() read extra byte which contain information how much memory allocated from malloc, it get 4. Then how crash happened or how free() touch administrative data ?
– Undefined Behaviour
Aug 5 '16 at 7:46
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Which characters make a URL invalid?
...he string contains valid URL characters, not if the string contains a well formed URL.)
– Leif Wickland
Dec 13 '11 at 19:28
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Regular expression for floating point numbers
...es, APIs, frameworks, libraries, etc., are based on a concept developed in formal language theory. However, software engineers have added many extensions that take these implementations far beyond the formal definition. So, while most regular expression engines resemble one another, there is actuall...