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Use a list of values to select rows from a pandas dataframe [duplicate]
... df[df['A'].isin([3, 6])]
Out[3]:
A B
1 6 2
2 3 3
And to get the opposite use ~:
In [4]: df[~df['A'].isin([3, 6])]
Out[4]:
A B
0 5 1
3 4 5
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C++ convert from 1 char to string? [closed]
I need to cast only 1 char to string . The opposite way is pretty simple like str[0] .
2 Answers
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What does -z mean in Bash? [duplicate]
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Also, -n is the opposite of -z. if [ -n "${1}" ] passes if the string is not null and not empty.
– Ryan
Mar 26 '18 at 23:48
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facebook: permanent Page Access Token?
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I made a PHP script to make it easier. Create an app. In the Graph API Explorer select your App and get a user token with manage_pages and publish_pages permission. Find your page's ID at the bottom of its About page. Fill in the conf...
How do I remove all specific characters at the end of a string in PHP?
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$output = rtrim($string, '.');
(Reference: rtrim on PHP.net)
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How do I install imagemagick with homebrew?
...nough to brew install Imagemagick. You have to also PECL install it so the PHP module is loaded.
From this SO answer:
brew install php
brew install imagemagick
brew install pkg-config
pecl install imagick
And you may need to sudo apachectl restart. Then check your phpinfo() within a simple php s...
What's the difference between dist-packages and site-packages?
...fference between packages installed in the dist-packages directory and the site-packages directory?
2 Answers
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How do search engines deal with AngularJS applications?
...ipt - you can use the Google Webmaster Tools to better understand how your sites are rendered by Google.
Original answer
If you want to optimize your app for search engines there is unfortunately no way around serving a pre-rendered version to the crawler. You can read more about Google's recomme...
How does Chrome's “Request Desktop Site” option work?
For iOS google chrome, when a user hits the "Request desktop site" button what does the browser do to try to bring up a desktop site? I imagine some sort of header on the request that sites are looking for, or something similar?
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Delete directory with files in it?
...ainly useful for explode()ing a path taken from the OS. alanhogan.com/tips/php/directory-separator-not-necessary
– ReactiveRaven
Jul 16 '12 at 23:47
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