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Get the Row(s) which have the max count in groups using groupby

How do I find all rows in a pandas dataframe which have the max value for count column, after grouping by ['Sp','Mt'] columns? ...
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Android : Check whether the phone is dual SIM

...pt for contacting the manufacturer). Now my changed question is, can we at all detect that the phone has two SIMs? I believe it can be detected with some intelligence. Few ways I can think of are: ...
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CORS - What is the motivation behind introducing preflight requests?

Cross-origin resource sharing is a mechanism that allows a web page to make XMLHttpRequests to another domain (from wikipedia ). ...
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Detect if value is number in MySQL

... The accepted answer is really clever, but this answer is more direct, and I think it should be the accepted solution. – pedromanoel Oct 30 '13 at 15:50 ...
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When do you use varargs in Java?

...lso can receive an indeterminate number of objects but a varargs parameter allows more flexibility and convenience at the point of invocation. You can write code to build an array and pass it, or you can let Java do it for you when you choose to receive it in a varargs parameter. ...
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How to prevent logback from outputting its own status at the start of every log when using a layout

...set the debug attribute of the configuration element to true, you will get all status information to the console. If this is your problem, just set it to false or remove it. If you have any configuration problems of level WARN or above, you will also get all status information logged to the console...
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What are the dangers when creating a thread with a stack size of 50x the default?

...f the data ( float[] s) that I'll be accesing onto the stack (using stackalloc ). 8 Answers ...
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Why should I use core.autocrlf=true in Git?

...y specific reasons to set autocrlf to true are: avoid git status showing all your files as modified because of the automatic EOL conversion done when cloning a Unix-based EOL Git repo to a Windows one (see issue 83 for instance) and your coding tools somehow depends on a native EOL style being pre...
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Run a single test method with maven

I know you can run all the tests in a certain class using: 13 Answers 13 ...
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Regular Expression to reformat a US phone number in Javascript

... ' + match[2] + '-' + match[3] } return null } Here's a version that allows the optional +1 international code: function formatPhoneNumber(phoneNumberString) { var cleaned = ('' + phoneNumberString).replace(/\D/g, '') var match = cleaned.match(/^(1|)?(\d{3})(\d{3})(\d{4})$/) if (match) ...