大约有 32,293 项符合查询结果(耗时:0.0335秒) [XML]

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In Ruby on Rails, what's the difference between DateTime, Timestamp, Time and Date?

...mats in ActiveRecord has little to do with Rails and everything to do with whatever database you're using. Using MySQL as an example (if for no other reason because it's most popular), you have DATE, DATETIME, TIME and TIMESTAMP column data types; just as you have CHAR, VARCHAR, FLOAT and INTEGER. ...
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What's the scope of a variable initialized in an if statement?

I'm new to Python, so this is probably a simple scoping question. The following code in a Python file (module) is confusing me slightly: ...
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What is a Shim?

What's the definition of a Shim? 8 Answers 8 ...
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What does enumerable mean?

...reabouts, all properties are enumerable. So the easier question to ask is, what's not enumerable? Certain objects have some non-enumerable properties, for example if you call Object.getOwnPropertyNames([]) (which returns an array of all properties, enumerable or not, on []), it will return ['length'...
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Volatile vs. Interlocked vs. lock

...rations on given field and interlocked is using the full fence. Footnote: What volatile is actually good for. As volatile doesn't prevent these kinds of multithreading issues, what's it for? A good example is saying you have two threads, one which always writes to a variable (say queueLength), and ...
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What's a good (free) visual merge tool for Git? (on windows) [closed]

... Thanks, Meld is really nice :) It's really clear and easy to see whats going on. Thanks for posting the install instructions. I would have been lost without those. – Daniel Tonon Apr 19 '15 at 11:55 ...
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What is the difference between jQuery: text() and html() ?

What the difference between text() and html() functions in jQuery ? 16 Answers 16 ...
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What's the best way of scraping data from a website? [closed]

... data from and map out which urls contain the data you are looking for and what data formats make up the responses. You will need a good working knowledge of HTTP as well as HTML and will probably want to find a decent piece of man in the middle proxy software. You will need to be able to inspect H...
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What is the shortest way to pretty print a org.w3c.dom.Document to stdout?

What is the easiest way to pretty print (a.k.a. formatted) a org.w3c.dom.Document to stdout? 6 Answers ...
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“:” (colon) in C struct - what does it mean? [duplicate]

What does :1 and :8 mean? 3 Answers 3 ...