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MySQL foreign key constraints, cascade delete

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Simple explanation of clojure protocols

...of: AddOperator => print(node.left) + '+' + print(node.right) NotOperator => '!' + print(node) func eval(node): case node of: AddOperator => eval(node.left) + eval(node.right) NotOperator => !eval(node) Now, if you want to add a new operation, say, type-checking, tha...
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How to use HTML to print header and footer on every printed page of a document?

... of each printed page. The same would work for a header element, just set top:0 instead. For example: <div class="divFooter">UNCLASSIFIED</div> CSS: @media screen { div.divFooter { display: none; } } @media print { div.divFooter { position: fixed; bottom: 0; } }...
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What is Hindley-Milner?

...istType = system.NewType("List", new[] { ItemType }); // Populate the top level typing environment (aka, the language's "builtins") env[@bool.Id] = @bool; env[@int.Id] = @int; env[@string.Id] = @string; env[ListType.Id] = env["nil"] = ListType; //... Action<object&g...
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Why use symbols as hash keys in Ruby?

... Great insight on the topic & First link in "Long answer" section is removed or migrated. – Hbksagar Dec 23 '14 at 17:06 2...
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What kind of leaks does automatic reference counting in Objective-C not prevent or minimize?

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Does bit-shift depend on endianness?

...te the bytes vertically rather than horizontally, with higher addresses on top. Which happens to be how memory map diagrams are commonly drawn.) share | improve this answer | ...
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Why does find -exec mv {} ./target/ + not work?

...st, it was a simple "ok". No, I didn't run it manually, I did it from the top of my head and rarely use that form of regex searching with find. It was just a 'might help' type thing. – Mike Ramirez Apr 9 '11 at 21:02 ...
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What is the difference in maven between dependency and plugin tags in pom xml?

... I think the missed point of this answer is that: the top-level dependencies are mainly used by your artifact instead of the plugins. – lfree Oct 11 '16 at 0:48 ...
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Why does the MongoDB Java driver use a random number generator in a conditional?

...wered May 30 '13 at 10:30 Marko TopolnikMarko Topolnik 171k2525 gold badges251251 silver badges372372 bronze badges ...