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Does a foreign key automatically create an index?

...e believing this to be true, but can't find much out there related specifically to this. 10 Answers ...
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What is an “unwrapped value” in Swift?

...st, you have to understand what an Optional type is. An optional type basically means that the variable can be nil. Example: var canBeNil : Int? = 4 canBeNil = nil The question mark indicates the fact that canBeNil can be nil. This would not work: var cantBeNil : Int = 4 cantBeNil = nil // can...
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When to use IList and when to use List

...hen to use each one. What I'm doing now is if I don't need the Sort or FindAll methods I use the interface. Am I right? Is there a better way to decide when to use the interface or the concrete type? ...
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What is the difference between Non-Repeatable Read and Phantom Read?

...at user A has queried has a different value the second time. Phantom read: All the rows in the query have the same value before and after, but different rows are being selected (because B has deleted or inserted some). Example: select sum(x) from table; will return a different result even if none of...
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Twitter Bootstrap alert message close and open again

I have a problem with alert messages. It is displayed normally, and I can close it when the user presses x (close), but when the user tries to display it again (for example, click on the button event) then it is not shown. (Moreover, if I print this alert message to console, it is equal to [] .) ...
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jQuery document.createElement equivalent?

...s a way of creating new elements, and which is "best". I put together a small benchmark, and here are roughly the results of repeating the above options 100,000 times: jQuery 1.4, 1.5, 1.6 Chrome 11 Firefox 4 IE9 <div> 440ms 640ms 460ms <div></d...
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TypeError: p.easing[this.easing] is not a function

...jqueryui/1.8.5/jquery-ui.min.js'></script> Is it this one ? Or shall i include another file? – Malloc Sep 25 '12 at 23:02 1 ...
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How to place div side by side

... cdn.polyfill.io/v2/docs or github.com/10up/flexibility but you may have really strict requirements that prevent using polyfills. – TheMcMurder Jun 27 '16 at 15:38 ...
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Do you put unit tests in same project or another project?

...n affect build processes like automated or continuous build. I don't really know of any pros. Having an extra project (or 10) isn't a con. Edit: More Info On Build and Shipping I would further recommend that any automated build process place production and unit tests into different locations....
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mailto link with HTML body

... As you can see in RFC 6068, this is not possible at all: The special <hfname> "body" indicates that the associated <hfvalue> is the body of the message. The "body" field value is intended to contain the content for the first text/plain body part of the m...