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What is the formal difference in Scala between braces and parentheses, and when should they be used?

... if, and only if, the method expects a single parameter. For example: List(1, 2, 3).reduceLeft{_ + _} // valid, single Function2[Int,Int] parameter List{1, 2, 3}.reduceLeft(_ + _) // invalid, A* vararg parameter However, there’s more you need to know to better grasp these rules. Increased compil...
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Django 1.7 throws django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet

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Efficient SQL test query or validation query that will work across all (or most) databases

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pandas: filter rows of DataFrame with operator chaining

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Waiting until two async blocks are executed before starting another block

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How does the C code that prints from 1 to 1000 without loops or conditional statements work?

I've found C code that prints from 1 to 1000 without loops or conditionals : But I don't understand how it works. Can anyone go through the code and explain each line? ...
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List of All Locales and Their Short Codes?

...know about them when you write your application. My Windows 7 system has 211 locales installed (listed below), so you wouldn't likely write any custom code or translation specific to this many locales. The most important thing for various versions of English is in formatting numbers and dates. Ot...
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Loop backwards using indices in Python?

I am trying to loop from 100 to 0. How do I do this in Python? 15 Answers 15 ...
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How to drop columns by name in a data frame

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Printing everything except the first field with awk

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