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Why does NULL = NULL evaluate to false in SQL server

...ually means is "no data". That might be used to represent the case where information is not known, but it is actually more likely to be used to indicate that something doesn't exist. To continue your example: What is Frank's middle name? He doesn't have one (null). What is Shirley's middle name? She...
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How many parameters are too many? [closed]

.... Furthermore, the number of parameters is a matter of readability, not performance. – clemp6r Sep 8 '16 at 7:36 ...
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How to get all child inputs of a div element (jQuery)

...nd here's a more complete list of these: api.jquery.com/category/selectors/form-selectors – Nick Craver♦ Mar 8 '10 at 16:18 add a comment  |  ...
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Highlight label if checkbox is checked

... This is an example of using the :checked pseudo-class to make forms more accessible. The :checked pseudo-class can be used with hidden inputs and their visible labels to build interactive widgets, such as image galleries. I created the snipped for the people that wanna test. input[...
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Custom HTTP Authorization Header

... The format defined in RFC2617 is credentials = auth-scheme #auth-param. So, in agreeing with fumanchu, I think the corrected authorization scheme would look like Authorization: FIRE-TOKEN apikey="0PN5J17HBGZHT7JJ3X82", hash="frJ...
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Limiting the number of records from mysqldump?

... @Phob: The --where option is basically appended to a query of the form SELECT * from table WHERE , so in this case you get SELECT * from table WHERE 1 limit 1000000. Without the 1, you would have an invalid query. Specifying 1 for a where clause (since 1 is always true) simply selects all...
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Can multiple different HTML elements have the same ID if they're different elements?

... @leo however this is the real world where browsers don't conform fully to the standards. In this case it could be a good thing, as there is no reason to enforce unique IDs. – BJury Jul 2 '14 at 11:39 ...
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How do you create a dropdownlist from an enum in ASP.NET MVC?

...r( x => x.YourEnumField, "Select My Type", new { @class = "form-control" }) For MVC v5 use EnumHelper @Html.DropDownList("MyType", EnumHelper.GetSelectList(typeof(MyType)) , "Select My Type", new { @class = "form-control" }) For MVC 5 and lower I rolled Rune's a...
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What is the correct way to represent null XML elements?

...y to this book or that book is not part of a series. In this case xsl transforms (or other event based processors) that have a template that matches book:series will never be called. For example, if your xsl turns the book element into table row (xhtml:tr) you may get the incorrect number of table c...
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Java: Best way to iterate through a Collection (here ArrayList)

...nt Collections and Sun or any JDK implementation strives to improve the performance rather than every one. – Phani Mar 8 '11 at 5:51 ...