大约有 41,300 项符合查询结果（耗时：0.0751秒） [XML]
Get first n characters of a string
...ngths on trimmed and untrimmed strings):
$string = (strlen($string) > 13) ? substr($string,0,10).'...' : $string;
So you will get a string of max 13 characters; either 13 (or less) normal characters or 10 characters followed by '...'
Update 2:
Or as function:
function truncate($string, $len...
setting multiple column using one update
...
344
Just add parameters, split by comma:
UPDATE tablename SET column1 = "value1", column2 = "val...
How to put the legend out of the plot
...fontP = FontProperties()
fontP.set_size('xx-small')
p1, = plt.plot([1, 2, 3], label='Line 1')
p2, = plt.plot([3, 2, 1], label='Line 2')
plt.legend(handles=[p1, p2], title='title', bbox_to_anchor=(1.05, 1), loc='upper left', prop=fontP)
As noted by Mateen Ulhaq, fontsize='xx-small' also works, wi...
Convert pandas timezone-aware DateTimeIndex to naive timestamp, but in certain timezone
...ments
So with my example from above:
In [4]: t = pd.date_range(start="2013-05-18 12:00:00", periods=2, freq='H',
tz= "Europe/Brussels")
In [5]: t
Out[5]: DatetimeIndex(['2013-05-18 12:00:00+02:00', '2013-05-18 13:00:00+02:00'],
dtype='datetime64[ns...
Check if value already exists within list of dictionaries?
...
273
Here's one way to do it:
if not any(d['main_color'] == 'red' for d in a):
# does not exist
...
What does SQL clause “GROUP BY 1” mean?
...
edited Aug 20 '18 at 12:03
answered Sep 12 '11 at 19:12
Yu...
Why doesn't requests.get() return? What is the default timeout that requests.get() uses?
...
130
What is the default timeout that get uses?
The default timeout is None, which means it'll ...
Persistent invalid graphics state error when using ggplot2
...
357
I ran into this same error and solved it by running:
dev.off()
and then running the plot a...
SQL JOIN and different types of JOINs
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331
An illustration from W3schools:
...
LINQ query to return a Dictionary
...
370
Use the ToDictionary method directly.
var result =
// as Jon Skeet pointed out, OrderBy is...