大约有 19,000 项符合查询结果（耗时：0.0318秒） [XML]
How to filter Pandas dataframe using 'in' and 'not in' like in SQL
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Series.isin accepts various types as inputs. The following are all valid ways of getting what you want:
df['countries'].isin(c1)
0 False
1 True
2 False
3 False
4 True
Name: countries, dtype: bool
# `in` operation
df[df['countries'].isin(c1)]
countries
1 UK
4 Ch...
Where and why do I have to put the “template” and “typename” keywords?
... that certain names aren't.
The "typename" keyword
The answer is: We decide how the compiler should parse this. If t::x is a dependent name, then we need to prefix it by typename to tell the compiler to parse it in a certain way. The Standard says at (14.6/2):
A name used in a template declar...
Safe String to BigDecimal conversion
...e it looks very odd when people have pointed out why your original answer didn't make any sense. :-)
– T.J. Crowder
Sep 20 '10 at 15:03
1
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Python `if x is not None` or `if not x is None`?
... of the if not x is None version to be more clear, but Google's style guide and PEP-8 both use if x is not None . Is there any minor performance difference (I'm assuming not), and is there any case where one really doesn't fit (making the other a clear winner for my convention)?*
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Twitter Bootstrap - Tabs - URL doesn't change
...volved, I think it's neatest as a small jQuery plugin: https://github.com/aidanlister/jquery-stickytabs
You can call the plugin like so:
$('.nav-tabs').stickyTabs();
I've made a blog post for this, http://aidanlister.com/2014/03/persisting-the-tab-state-in-bootstrap/
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PostgreSQL Connection URL
... postgresql://localhost/mydb?user=other&password=secret did the trick
– Karuhanga
Oct 29 '18 at 14:31
1
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Is there a CSS selector by class prefix?
...us-"] will match the following element, which may be undesirable:
<div id='D' class='foo-class foo-status-bar bar-class'></div>
If you can ensure that such a scenario will never happen, then you are free to use such a selector for the sake of simplicity. However, the combination above...
What happens to git commits created in a detached HEAD state?
...herry-pick [SHA] to move the commit onto an existing branch in case you accidentally committed while in detached head state
– Jan Aagaard Meier
Aug 20 '14 at 12:56
3
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Facebook share link without JavaScript
...parameter. You can use an indirect way to achieve this.
Create a server side page for example: "/sharer.aspx"
Link this page whenever you want the share functionality.
In the "sharer.aspx" get the refering url, and redirect user to "https://www.facebook.com/sharer/sharer.php?u={referer}"
Example...
Javascript Equivalent to PHP Explode()
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Downvoter: "How dare you provide a simpler and more performant solution instead of validating my preconceptions??"
– jchook
May 18 '18 at 19:36
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