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How to avoid overflow in expr. A * B - C * D
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This seems too trivial I guess.
But A*B is the one that could overflow.
You could do the following, without losing precision
A*B - C*D = A(D+E) - (A+F)D
= AD + AE - AD - DF
= AE - DF
^smaller ...
How to get package name from anywhere?
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An idea is to have a static variable in your main activity, instantiated to be the package name. Then just reference that variable.
You will have to initialize it in the main activity's onCreate() method:
Global to the class:
pub...
How to style a div to be a responsive square? [duplicate]
I want my div to adapt its height to always equal its width. The width is percental. When the parent's width decreases, the box should decrease by keeping its aspect ratio.
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Is there a Google Keep API? [closed]
Is there a API for Google Keep? I want to make a windows 8 app for Google Keep, so that it synchronizes with your phone.
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Relational Database Design Patterns? [closed]
...n Fowler's Signature Series called Refactoring Databases. That provides a list of techniques for refactoring databases. I can't say I've heard a list of database patterns so much.
I would also highly recommend David C. Hay's Data Model Patterns and the follow up A Metadata Map which builds on the f...
What are enums and why are they useful?
Today I was browsing through some questions on this site and I found a mention of an enum being used in singleton pattern about purported thread safety benefits to such solution.
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Number of occurrences of a character in a string [duplicate]
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You could do this:
int count = test.Split('&').Length - 1;
Or with LINQ:
test.Count(x => x == '&');
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How to use a RELATIVE path with AuthUserFile in htaccess?
...ss that uses basic authentication. It seems the path to the .htpasswd file isn't relative to the htaccess file, but instead to the server config.
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How to print the contents of RDD?
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If you want to view the content of a RDD, one way is to use collect():
myRDD.collect().foreach(println)
That's not a good idea, though, when the RDD has billions of lines. Use take() to take just a few to print out:
myRDD.take(n).foreach(println)
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Accessing dict keys like an attribute?
...ent to access dict keys as obj.foo instead of obj['foo'] , so I wrote this snippet:
27 Answers
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