大约有 31,840 项符合查询结果(耗时:0.0310秒) [XML]

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How do I limit the number of returned items?

...s single argument to sort(), which must be an array of constraints or just one constraint, and (2) execFind() is gone, and replaced with exec() instead. Therefore, with the mongoose 3.8.1 you'd do this: var q = models.Post.find({published: true}).sort({'date': -1}).limit(20); q.exec(function(err, p...
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Removing numbers from string [closed]

...irkStrauser point out, you actually do not need to use the brackets in the one-liner, making the piece inside the parentheses a generator expression (more efficient than a list comprehension). Even if this doesn't fit the requirements for your assignment, it is something you should read about eventu...
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Set object property using reflection

...ered Mar 6 '09 at 17:55 El CheiconEl Cheicon 4,13622 gold badges2424 silver badges2323 bronze badges ...
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Counting Line Numbers in Eclipse [closed]

... As mentioned by @PeterAjtai, it does not count empty lines. However, this will: \n[^\n]* – MiniGod Jul 24 '12 at 17:10 ...
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Remove excess whitespace from within a string

... (even though it wasn't the question) – Robert Johnstone May 16 '12 at 14:17 @Gigala "What would be the best way to re...
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What is the maximum length of a table name in Oracle?

...that clear: there are multi-byte character sets which DO require more than one byte per ASCII character, but they cannot be used as database character set as there is a strict "ASCII superset" requirement for them. (actually its ASCII or EBCDIC depending on the platform). – eck...
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Getting the caller function name inside another function in Python? [duplicate]

... thanks. also discovered that.filename can also help when .function alone is ambiguous. for example: print(inspect.stack()[1].function, inspect.stack()[1].filename) – 10mjg Feb 22 at 22:00 ...
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Why can't R's ifelse statements return vectors?

...igned for when you have a big long vector of tests and want to map each to one of two options. For example, I often do colors for plot() in this way: plot(x,y, col = ifelse(x>2, 'red', 'blue')) If you had a big long vector of tests but wanted pairs for outputs, you could use sapply() or plyr...
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Check whether a path is valid

...e or AbsoluteOrRelative it didn't work for relative paths like Thomas mentioned. I ended up using Patko's answer instead & it works for my purposes. – JohnnyM Apr 16 '14 at 20:15 ...
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Check if a path represents a file or a folder

... As I mentioned in my question, I have only Strings and no File instances, and I can't create them. – Egor Oct 8 '12 at 11:08 ...