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Most efficient method to groupby on an array of objects

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How to remove the first Item from a list?

I have the list [0, 1, 2, 3, 4] I'd like to make it into [1, 2, 3, 4] . How do I go about this? 10 Answers ...
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Fastest way to replace NAs in a large data.table

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Calculate date from week number

...kHolterman even with the fix by @RobinAndersson. Reading up on the ISO 8601 standard resolves the issue nicely. Use the first Thursday as the target and not Monday. The code below will work for Week 53 of 2009 as well. public static DateTime FirstDateOfWeekISO8601(int year, int weekOfYear) { D...
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Django 1.7 - makemigrations not detecting changes

... 188 If you're changing over from an existing app you made in django 1.6, then you need to do one p...
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How to profile methods in Scala?

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Iterate a list as pair (current, next) in Python

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Logical XOR operator in C++?

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How to get the first and last date of the current year?

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What's the difference between “mod” and “remainder”?

... 145 There is a difference between modulus and remainder. For example: -21 mod 4 is 3 because -21 ...