大约有 44,500 项符合查询结果（耗时：0.0352秒） [XML]
What is Func, how and when is it used
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edited Sep 2 '10 at 7:58
answered Sep 2 '10 at 7:48
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Annotating text on individual facet in ggplot2
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edited Aug 9 '12 at 19:24
Andy
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answered Aug 9 '12 a...
How do I remove duplicate items from an array in Perl?
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edited Jun 21 '14 at 1:39
Miller
33.9k44 gold badges3232 silver badges5555 bronze badges
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What is the difference between “text” and new String(“text”)?
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12 Answers
12
Active
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How to compare versions in Ruby?
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234
Gem::Version.new('0.4.1') > Gem::Version.new('0.10.1')
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PHP Function with Optional Parameters
I've written a PHP function that can accepts 10 parameters, but only 2 are required. Sometimes, I want to define the eighth parameter, but I don't want to type in empty strings for each of the parameters until I reach the eighth.
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Convert datetime object to a String of date only in Python
...o help you format your date.
E.g.,
import datetime
t = datetime.datetime(2012, 2, 23, 0, 0)
t.strftime('%m/%d/%Y')
will yield:
'02/23/2012'
More information about formatting see here
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Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
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277
Try to start the MySQL server:
mysql.server start
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How do I get the row count of a pandas DataFrame?
...setup=lambda n: pd.DataFrame(np.arange(n * 3).reshape(n, 3)),
n_range=[2**k for k in range(25)],
kernels=[
lambda data: data.shape[0],
lambda data: data[0].count(),
lambda data: len(data.index),
],
labels=["data.shape[0]", "data[0].count()", "len(data.index)"]...