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What is copy-on-write?

...enance of instant snapshot on database servers like Microsoft SQL Server 2005. Instant snapshots preserve a static view of a database by storing a pre-modification copy of data when underlaying data are updated. Instant snapshots are used for testing uses or moment-dependent reports and should not b...
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Swift - encode URL

... answered Jul 3 '14 at 11:05 zaphzaph 106k1919 gold badges173173 silver badges209209 bronze badges ...
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How to duplicate sys.stdout to a log file?

... Got the error "sys:1: ResourceWarning: unclosed file <_io.BufferedWriter name=5>", so I had to add tee.stdin.close() at the end of my program. I also get "ResourceWarning: subprocess 1842 is still running", and adding sys.stdou...
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Do you need text/javascript specified in your tags?

...ML comments are not to include --, so a script that decrements has an HTML error. ... type="text/javascript" This attribute is optional. Since Netscape 2, the default programming language in all browsers has been JavaScript. In XHTML, this attribute is required and unnecessary. In HTML, ...
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REST HTTP status codes for failed validation or invalid duplicate

...ntax So it might have been argued that it was inappropriate for semantic errors. But not any more; since June 2014 the relevant standard RFC 7231, which supersedes the previous RFC2616, gives the use of 400 (Bad Request) more broadly as the server cannot or will not process the request du...
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__FILE__, __LINE__, and __FUNCTION__ usage in C++

... Messing with #line is very useful for pre-processors that want to keep errors reported in the user's C code in line with the user's source file. Yacc, Lex, and (more at home to me) ESQL/C preprocessors do that. share ...
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HTML5 Local Storage fallback solutions [closed]

... * >> document.cookie = "bar=test; expires=Thu, 14 Jun 2018 13:05:38 GMT; path=/" * the value of document.cookie may look like * >> "foo=value; bar=test" */ var nameEQ = name + "="; // what we are looking for var ca = ...
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How do I declare an array of weak references in Swift?

... I get a compiler error with MyProtocol: class and NSHashTable<MyProtocol>.weakObjects(). "'NSHashTable' requires that 'MyProtocol' be a class type. – Greg Oct 24 '18 at 16:35 ...
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“Templates can be used only with field access, property access, single-dimension array index, or sin

Why am I receiving the error: 4 Answers 4 ...
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Python matplotlib multiple bars

... h = rect.get_height() ax.text(rect.get_x()+rect.get_width()/2., 1.05*h, '%d'%int(h), ha='center', va='bottom') autolabel(rects1) autolabel(rects2) autolabel(rects3) plt.show() share | ...