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What's the actual use of 'fail' in JUnit test case?

... pseudo-code: test_addNilThrowsNullPointerException() { try { foo.add(NIL); // we expect a NullPointerException here fail("No NullPointerException"); // cause the test to fail if we reach this } catch (NullNullPointerException e) { ...
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(HTML) Download a PDF file instead of opening them in browser when clicked

... Sometimes the question is wrong. ;) Anyways, regarding your issue, that's all a UX problem. Forcing the web to behave in specific ways is sometimes necessary, but often there's better solutions from a UX perspective. Also, my answer is correct. You can not do what you want to do with HTML (which is...
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What's the algorithm to calculate aspect ratio?

...re that's been changed from 16:9 to 5:4 - I still remember the incredibly tall, thin cowboys I used to watch in my youth on television before letter-boxing was introduced. You may be better off having one different image per aspect ratio and just resize the correct one for the actual screen dimensio...
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How to manually set an authenticated user in Spring Security / SpringMVC

After a new user submits a 'New account' form, I want to manually log that user in so they don't have to login on the subsequent page. ...
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What is the correct way to create a single-instance WPF application?

...t the blog hasn't been updated in a while. That makes me worry that eventually it might disappear, and with it, the advocated solution. I'm reproducing the content of the article here for posterity. The words belong solely to the blog owner at Sanity Free Coding. Today I wanted to refactor so...
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What are the differences between django-tastypie and djangorestframework? [closed]

... EDIT Outdated answer, tastypie is not really maintained anymore. Use Django REST framework if you have to choose a framework to do REST. For an overview about the actual differences between both of them you should read their documentation. They are both more or le...
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Efficient way to apply multiple filters to pandas DataFrame or Series

...s to apply several filters to a Pandas DataFrame or Series object. Essentially, I want to efficiently chain a bunch of filtering (comparison operations) together that are specified at run-time by the user. ...
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Java generics type erasure: when and what happens?

...tring>. But objects don't just appear from nowhere. They are created locally, passed in as a method invocation argument, returned as the return value from a method call, or read from a field of some object... In all these cases you CAN know at runtime what the generic type is, either implicitly ...
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find vs find_by vs where

... Use whichever one you feel suits your needs best. The find method is usually used to retrieve a row by ID: Model.find(1) It's worth noting that find will throw an exception if the item is not found by the attribute that you supply. Use where (as described below, which will return an empty arr...
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What is declarative programming? [closed]

... It will be really great if you can mention on how it is different from imperative programming (languages like C, C++, C#) then it will be more easier for readers to make out the difference. – RBT Dec...