大约有 35,800 项符合查询结果（耗时：0.0444秒） [XML]
Why is \r a newline for Vim?
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iconoclast
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answered Sep 16 '08 at 15:16
pjzpjz
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Installing specific laravel version with composer create-project
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answered May 20 '14 at 8:15
edi9999edi9999
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How to make Twitter Bootstrap tooltips have multiple lines?
...ally be actual newlines. Alternatively, you can use encoded newlines &#013;, but that's probably even less desirable than using <br>'s.
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Plot two histograms on single chart with matplotlib
...umpy
from matplotlib import pyplot
x = [random.gauss(3,1) for _ in range(400)]
y = [random.gauss(4,2) for _ in range(400)]
bins = numpy.linspace(-10, 10, 100)
pyplot.hist(x, bins, alpha=0.5, label='x')
pyplot.hist(y, bins, alpha=0.5, label='y')
pyplot.legend(loc='upper right')
pyplot.show()
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How to get a vertical geom_vline to an x-axis of class date?
...a time series from and would like to draw a vertical line for years 1998, 2005 and 2010 for example. I tried with ggplot and qplot syntax, but still I either see no vertical line at all or the vertical line is drawn at the very first vertical grid and the whole series is shifted somewhat strange...
SQL Server Escape an Underscore
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edited Jun 12 at 0:28
Pang
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answered...
In where shall I use isset() and !empty()
...ty
FTA:
"isset() checks if a variable has a
value including (False, 0 or empty
string), but not NULL. Returns TRUE
if var exists; FALSE otherwise.
On the other hand the empty() function
checks if the variable has an empty
value empty string, 0, NULL or
False. Returns FALSE if v...
How do you append to an already existing string?
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edited Feb 17 '17 at 10:23
lleaff
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answered Feb 12 '10 at 7...
Python Regex - How to Get Positions and Values of Matches
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Herbert
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answered Oct 30 '08 at 14:15
Peter HoffmannPete...
Does ARC support dispatch queues?
... now for the long answer…
If your deployment target is lower than iOS 6.0 or Mac OS X 10.8
You need to use dispatch_retain and dispatch_release on your queue. ARC does not manage them.
If your deployment target is iOS 6.0 or Mac OS X 10.8 or later
ARC will manage your queue for you. You do ...