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SQL Joins Vs SQL Subqueries (Performance)?

...or, since SQL normally evaluates it as a series of WHERE clauses separated by "OR" (WHERE x=Y OR x=Z OR...). As with ALL THINGS SQL though, your mileage may vary. The speed will depend a lot on indexes (do you have indexes on both ID columns? That will help a lot...) among other things. The onl...
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Why can't I reference System.ComponentModel.DataAnnotations?

...ence the assembly in which this namespace is defined (it is not referenced by default in the visual studio templates). Open your reference manager and add a reference to the System.ComponentModel.DataAnnotations assembly (Solution explorer -> Add reference -> Select .Net tab -> select Syste...
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Where should @Service annotation be kept? Interface or Implementation?

...ose of an interface is that it define a contract that can been implemented by several implementations. On the other side you have your injection point (@Autowired). Having just one interface and only one class that implement it, is (IMHO) useless, and violates YAGNI. fact: When you put: @Componen...
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What is so special about Generic.xaml?

...he same assembly as the control. The key for the default style is provided by the Control.DefaultStyleKey dependency property, the default value of which is overridden in each sub-class of Control. The name of the resource dictionary depends on the current Windows theme e.g. on Vista using the Aero...
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How to create file execute mode permissions in Git on Windows?

...Git in Windows, and want to push the executable shell script into git repo by one commit. 5 Answers ...
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Git: How to edit/reword a merge commit's message?

...k part of that is an even simpler idiocy: we never even fire up the editor by default for a "git merge", but we do for a "git commit". That was a design mistake, and it means that if you want to actually add a note to a merge, you have to do extra work. So people don't. Note that, before Git 2...
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Is an empty href valid?

...rence to the identified fragment of that document. RFC 2396 is obsoleted by RFC 3986 (which is currently IETF’s URI standard), which essentially says the same. HTML5 HTML5 uses (valid URL potentially surrounded by spaces → valid URL) W3C’s URL spec, which has been discontinued. WHATWG’s ...
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What does the “__block” keyword mean?

... It tells the compiler that any variable marked by it must be treated in a special way when it is used inside a block. Normally, variables and their contents that are also used in blocks are copied, thus any modification done to these variables don't show outside the block...
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How do I delete NuGet packages that are not referenced by any project in my solution?

... you look to see where they are used, you can see that they are referenced by none of the solution's projects? They are NOT displaying an Uninstall? ...
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Python - Create list with numbers between 2 values?

...eeds to be 16+1 = 17 EDIT: To respond to the question about incrementing by 0.5, the easiest option would probably be to use numpy's arange() and .tolist(): >>> import numpy as np >>> np.arange(11, 17, 0.5).tolist() [11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, ...