大约有 43,000 项符合查询结果(耗时:0.0490秒) [XML]

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What's the difference between a single precision and double precision floating point operation?

What is the difference between a single precision floating point operation and double precision floating operation? 11 Answ...
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How many double numbers are there between 0.0 and 1.0?

... 52-bit fraction; between any two adjacent powers of two (inclusive of one and exclusive of the next one), there will therefore be 2 to the 52th power different doubles (i.e., 4503599627370496 of them). For example, that's the number of distinct doubles between 0.5 included and 1.0 excluded, and ex...
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What to learn for making Java web applications in Java EE 6? [closed]

...al, my advice would be to start with Java EE 6 only. So, grab GlassFish v3 and either get the book Beginning Java EE 6 Platform with GlassFish 3: From Novice to Professional or follow the Java EE 6 tutorial. In my opinion, the book (that I've started to read so I know what I'm talking about) provide...
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What's the difference between a Future and a Promise?

What's the difference between Future and Promise ? They both act like a placeholder for future results, but where is the main difference? ...
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Compiled vs. Interpreted Languages

I'm trying to get a better understanding of the difference. I've found a lot of explanations online, but they tend towards the abstract differences rather than the practical implications. ...
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Difference between “or” and || in Ruby? [duplicate]

What's the difference between the or and || operators in Ruby? Or is it just preference? 8 Answers ...
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What exactly is RESTful programming?

... it was originally envisioned. Lookups should use GET requests. PUT, POST, and DELETE requests should be used for mutation, creation, and deletion respectively. REST proponents tend to favor URLs, such as http://myserver.com/catalog/item/1729 but the REST architecture does not require these "pre...
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Could someone explain the pros of deleting (or keeping) unused code?

...moved: For anyone new working on a project, they not only have to understand the working code, they have to understand unused material also. This is wasted time and creates confusion. There is a danger that at sometime someone will make a change which inadvertently involve the 'dormant' code and...
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Non-Relational Database Design [closed]

...Hypertable, CouchDB, SimpleDB, Google App Engine datastore, Voldemort, Cassandra, SQL Data Services, etc.). They're also often referred to as "key/value stores", and at base they act like giant distributed persistent hash tables. ...
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What is NoSQL, how does it work, and what benefits does it provide? [closed]

I've been hearing things about NoSQL and that it may eventually become the replacement for SQL DB storage methods due to the fact that DB interaction is often a bottle neck for speed on the web. ...