大约有 41,000 项符合查询结果（耗时：0.0545秒） [XML]
Detect If Browser Tab Has Focus
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onblur|.blur/onfocus|.focus "duplicate" calls
window losing focus through selection of alternate app, like word
This tends to be undesirable simply because, if you have a bank page open, and it's onblur event tells it to mask the page, then if you open calculator, you can't see the page anymore!
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Take a full page screenshot with Firefox on the command-line
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Just FYI you can also select DOM notes through the inspector and then right-click -> screenshot node. This is super helpful when you want to screenshot a section of a page.
– Tom
Jan 21 '16 at 22:43
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Detect and exclude outliers in Pandas data frame
...se` depending on if it is a value below the threshold.
constrains = df.select_dtypes(include=[np.number]) \
.apply(lambda x: np.abs(stats.zscore(x)) < z_thresh, reduce=False) \
.all(axis=1)
# Drop (inplace) values set to be rejected
df.drop(df.index[~constrains], inpla...
SQLAlchemy - Getting a list of tables
...te_engine('postgresql+psycopg2://root:password@localhost/
q = eng.execute('SELECT * FROM pg_catalog.pg_tables')
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Matplotlib plots: removing axis, legends and white spaces
... embedded image in the plot). Solution: fig.axes[0], and in general all or selected axes.
– Ioannis Filippidis
Jun 6 '15 at 21:38
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Send and receive messages through NSNotificationCenter in Objective-C?
..."TestNotification"
// notifications using the receiveTestNotification: selector. By
// specifying object:nil, we tell the notification center that we are not
// interested in who posted the notification. If you provided an actual
// object rather than nil, the notification center wil...
How to semantically add heading to a list
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Try defining a new class, ulheader, in css. p.ulheader ~ ul selects all that immediately follows My Header
p.ulheader ~ ul {
margin-top:0;
{
p.ulheader {
margin-bottom;0;
}
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How to Empty Caches and Clean All Targets Xcode 4 and later
...option key, now the option "Clean" will change to "Clean Build Folder ..." select that option.
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retrieve links from web page using python and BeautifulSoup [closed]
...re anything not purely Python isn't allowed.
lxml.html also supports CSS3 selectors so this sort of thing is trivial.
An example with lxml and xpath would look like this:
import urllib
import lxml.html
connection = urllib.urlopen('http://www.nytimes.com')
dom = lxml.html.fromstring(connection.r...
Does Python SciPy need BLAS?
...tp://www.netlib.org/blas/blas.tgz
tar xzf blas.tgz
cd BLAS-*
## NOTE: The selected Fortran compiler must be consistent for BLAS, LAPACK, NumPy, and SciPy.
## For GNU compiler on 32-bit systems:
#g77 -O2 -fno-second-underscore -c *.f # with g77
#gfortran -O2 -std=legacy -fno-seco...