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Can't find @Nullable inside javax.annotation.*
...tion comes from the package javax.annotation.Nullable ;
but when I import it a compilation error is generated: cannot find symbol
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Hashing a dictionary?
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If your dictionary is not nested, you could make a frozenset with the dict's items and use hash():
hash(frozenset(my_dict.items()))
This is much less computationally intensive than generating the JSON string or representation of the dictionary.
UPDATE: Please see the comments below,...
MySQL error: key specification without a key length
I have a table with a primary key that is a varchar(255). Some cases have arisen where 255 characters isn't enough. I tried changing the field to a text, but I get the following error:
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How to link godaddy domain with AWS Elastic Beanstalk environment?
I'm running into this problem trying to link my Godaddy domain with an AWS Elastic Beanstalk instance . I found a lot of documentation on how to link an EC2 instance with a domain on Godaddy but not for Elastic Beanstalk instance. So I ended up with this URL: www.MY_SITE.elasticbeanstalk.com
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Ways to iterate over a list in Java
Being somewhat new to the Java language I'm trying to familiarize myself with all the ways (or at least the non-pathological ones) that one might iterate through a list (or perhaps other collections) and the advantages or disadvantages of each.
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Bootstrap: how do I change the width of the container?
I have used Twitter Bootstrap to develop a website with the fixed container class, but now the client wants the website to be 1000px width and not 1170px. I don't use the .less files.
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scopes with lambda and arguments in Rails 4 style?
...ails 3 approach for using a lambda that can pass an argument the same way with 4 as I do with 3.
6 Answers
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What is the difference between NaN and None?
...d nan is assigned. Surely None is more descriptive of an empty cell as it has a null value, whereas nan just says that the value read is not a number.
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How do I do redo (i.e. “undo undo”) in Vim?
...follow
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edited Oct 12 '09 at 17:24
answered Oct 12 '09 at 17:12
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How to write asynchronous functions for Node.js
I've tried to research on how exactly asynchronous functions should be written. After a lot of plowing through a lot of documentation, it's still unclear to me.
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