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Why is Dictionary preferred over Hashtable in C#?

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Why am I getting this error: No mapping specified for the following EntitySet/AssociationSet - Entit

... From Model context menu item. The confusing part is that this action does more than simply generating a DDL script. In fact, it changes the EDMX file to include SSDL information. From this point on, the EDMX file will enter a state in which every entity in the designer/CSDL must map to an entity in...
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How can I get the domain name of my site within a Django template?

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Can an Option in a Select tag carry multiple values?

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For homebrew mysql installs, where's my.cnf?

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jQueryUI Tooltips are competing with Twitter Bootstrap

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How to use a variable for a key in a JavaScript object literal?

... @AndyE consider updating "recent versions" and "current IE TP" with some more specific time like "Versions later than XXX" or "after 2014-mm" (I'd make change myself, but I don't know what good values would be. – Alexei Levenkov Feb 26 '15 at 1:59 ...
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How to check if a string is a valid hex color representation?

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Ruby on Rails - Import Data from a CSV file

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Differences between strong and weak in Objective-C

...e you set the property to nil will the object get destroyed (unless one or more other objects also hold a strong reference to it). In contrast, with a weak reference you signify that you don't want to have control over the object's lifetime. The object you are referencing weakly only lives on becau...