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How to design a product table for many kinds of product where each product has many parameters
...stead, one table per product type, storing both common product attributes, and product-specific attributes.
Serialized LOB: One table for Products, storing attributes common to all product types. One extra column stores a BLOB of semi-structured data, in XML, YAML, JSON, or some other format. This...
Why does this CSS margin-top style not work?
... form a single margin. Margins that combine this way are said to collapse, and the resulting combined margin is called a collapsed margin.
Adjoining vertical margins collapse [...]
Two margins are adjoining if and only if:
both belong to in-flow block-level boxes that participate...
Can scrapy be used to scrape dynamic content from websites that are using AJAX?
I have recently been learning Python and am dipping my hand into building a web-scraper. It's nothing fancy at all; its only purpose is to get the data off of a betting website and have this data put into Excel.
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Testing web application on Mac/Safari when I don't own a Mac
...ntly when a web site I launched displayed perfectly on IE, Firefox, Chrome and Safari on Windows but was corrupted when viewed using Safari on the Mac (by a potential customer), I need to start testing how my sites look when viewed on a Mac.
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Condition within JOIN or WHERE
...al algebra allows interchangeability of the predicates in the WHERE clause and the INNER JOIN, so even INNER JOIN queries with WHERE clauses can have the predicates rearrranged by the optimizer so that they may already be excluded during the JOIN process.
I recommend you write the queries in the mo...
Anatomy of a “Memory Leak”
...Basically, in .NET a memory leak occurs when referenced objects are rooted and thus cannot be garbage collected. This occurs accidentally when you hold on to references beyond the intended scope.
You'll know that you have leaks when you start getting OutOfMemoryExceptions or your memory usage goes ...
Is there a practical use for weak references? [duplicate]
...ta. It can also be used to keep information about objects used else where and you don't know when those objects are discarded.
BTW Soft References are like Weak references, but they will not always be cleaned up immediately. The GC will always discard weak references when it can and retain Soft R...
View/edit ID3 data for MP3 files
What's a quick and easy way to view and edit ID3 tags (artist, album, etc.) using C#?
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Setting JDK in Eclipse
I have two JDKs, for Java 6 and 7.
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How to clone ArrayList and also clone its contents?
How can I clone an ArrayList and also clone its items in Java?
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