大约有 11,644 项符合查询结果(耗时:0.0286秒) [XML]

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How to design a product table for many kinds of product where each product has many parameters

...a blob of attributes that can't be easily queried within SQL; you have to fetch the whole blob back to the application and sort it out there. Entity-Attribute-Value: One table for Products, and one table that pivots attributes to rows, instead of columns. EAV is not a valid design with respect to t...
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Why does ('0' ? 'a' : 'b') behave different than ('0' == true ? 'a' : 'b') [duplicate]

...this is a matter of interpretation, which leads to different solutions and etc, not some universal truth like in math. :) – Bakudan Sep 21 '11 at 9:04 8 ...
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Command to collapse all sections of code?

...d): ctrl + m + o only collapses all FUNCTIONS, not the classes (or regions etc). ctrl +m + L will toggle expanding, collapsing everything. – paul23 Oct 11 '11 at 11:30 ...
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Animation CSS3: display + opacity

... Not only invisible, but also transparent to events (clicks etc). Not changing display means not reflowing the document, which is a good thing. Most elements that should fade in / out through opacity should probably have fixed or absolute position anyway. – Rasm...
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What is the difference between a 'closure' and a 'lambda'?

...mbdas? :P Well, the corporate marketoids of Sun/Oracle, Microsoft, Google etc. are to blame, because that's what they called these constructs in their languages (Java, C#, Go etc.). They often call "closures" what are supposed to be just lambdas. Or they call "closures" a particular technique they ...
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What's the best way to do “application settings” in Android? [closed]

...shared preferences can be used by all the components (activities, services etc) off the applications. Activity handled preferences: These preferences can only be used with in the activity and can not be used by other components of the application. Shared Preferences: The shared preferences are ma...
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How to get database structure in MySQL via query

... quite an acceptable English sentence (no less than "The French WORD for", etc), and this generalizes to "The {{language name}} for {{thing to express}}" such as "The DDL for this table". "A C function is not by itself C" is the same as saying "A French word is not by itself French": well it's not ...
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Iterate through pairs of items in a Python list [duplicate]

...xecutes). It doesn't work on generators, only sequences (tuple, list, str, etc). share | improve this answer | follow | ...
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How to Select Every Row Where Column Value is NOT Distinct

...en columns happen to collide with SQL keywords like _default, _type, _sum, etc. – yzorg Aug 17 '16 at 14:26 add a comment  |  ...
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Detect HTTP or HTTPS then force HTTPS in JavaScript

...esn't save this redirect. You describe task for web-server (apache, nginx etc) http 301, http 302 share | improve this answer | follow | ...