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What is the most efficient way to loop through dataframes with pandas? [duplicate]
...Note that iterrows is very slow (it converts every row to a series, potentially messing with your data types). When you need an iterator, better to use itertuples
– joris
Jul 29 '15 at 15:46
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How to pause / sleep thread or process in Android?
...{
button.setBackgroundResource(R.drawable.avatar_small);
}
}, changeTime);
}
});
Without creating tmp Handler. Also this solution is better than @tronman because we do not retain view by Handler.
Also we don't have p...
How to generate a new Guid in stored procedure?
... with you. However I'm working on a database which someone else developed. All the previous tables used a Guid as a primary key so I'm just trying to be consistent. Though for new tables maybe I should evaluate on a case by case basis. Thanks for the info though.
– Mr Cricket
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Foreach loop, determine which is the last iteration of the loop
...to iterate through the collection. While this might not be a problem for small collections, if it gets large it could have performance implications. It will also fail if the list contains duplicate items. In this cases something like this may be more appropriate:
int totalCount = result.Count();
fo...
Generate random string/characters in JavaScript
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@dan_waterworth, Actually, += is often faster for some reason, even used inside loops - jsperf.com/join-vs-concatenation
– Konrad Borowski
May 1 '13 at 12:29
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How do I create a Python function with optional arguments?
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Try calling it like: obj.some_function( '1', 2, '3', g="foo", h="bar" ). After the required positional arguments, you can specify specific optional arguments by name.
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How do I test for an empty string in a Bash case statement?
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I use a simple fall through. no parameters passed ($1="") will be caught by the second case statement, yet the following * will catch any unknown parameter. Flipping the "") and *) will not work as *) will catch everything every time in that...
#1071 - Specified key was too long; max key length is 767 bytes
...data model regarding this entity to see if there's improvements that would allow you to implement the intended business rules without hitting the MySQL limitation.
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In Python, how to display current time in readable format
...e.g., -0400. %Z gives you current timezone name (or abbreviation) automatically. Python doesn't support %l, you could use %I instead.
– jfs
Dec 14 '13 at 19:30
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Difference between Activity and FragmentActivity
...compatibility with older versions of Android, but other than that, there really isn't much of a difference between the two. Just make sure you change all calls to getLoaderManager() and getFragmentManager() to getSupportLoaderManager() and getSupportFragmentManager() respectively.
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