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Unpacking, extended unpacking and nested extended unpacking

...the length of this post, but I decided to opt for completeness. Once you know a few basic rules, it's not hard to generalize them. I'll do my best to explain with a few examples. Since you're talking about evaluating these "by hand," I'll suggest some simple substitution rules. Basically, you might...
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Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?

Git has a well-known, or at least sort-of-well-known, empty tree whose SHA1 is: 3 Answers ...
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No serializer found for class org.hibernate.proxy.pojo.javassist.Javassist?

...l-on-empty-beans=false I'm using Spring Boot v1.3 with Hibernate 4.3 It now serializes the entire object and nested objects. EDIT: 2018 Since this still gets comments I'll clarify here. This absolutely only hides the error. The performance implications are there. At the time, I needed something...
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Find a Pull Request on Github where a commit was originally created

...ues" link on the left. UPDATED 13 July 2017 Via the Github UI there is a now a really easy way to do this. If you are looking at a commit in the list of commits in a branch in the UI, click on the link to the commit itself. If there is a PR for that commit and it wasn't added directly to the branc...
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How do you use the ? : (conditional) operator in JavaScript?

...sion where an if...else statement would be awkward. For example: var now = new Date(); var greeting = "Good" + ((now.getHours() > 17) ? " evening." : " day."); The example creates a string containing "Good evening." if it is after 6pm. The equivalent code using an if...else state...
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Why does “pip install” inside Python raise a SyntaxError?

... I know for me I had to do this from the command line (not python command line). This was after changing directory to the location of python.exe and then needed to put the file type on pip3. In my case I was after requests for HT...
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Summarizing multiple columns with dplyr? [duplicate]

...x. I have a data frame with different variables and one grouping variable. Now I want to calculate the mean for each column within each group, using dplyr in R. ...
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Add 2 hours to current time in MySQL?

... SELECT * FROM courses WHERE DATE_ADD(NOW(), INTERVAL 2 HOUR) > start_time See Date and Time Functions for other date/time manipulation. share | improve thi...
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How do I change the default location for Git Bash on Windows?

... Right cd-to-home was overriding my start in value. all sorted now. – JayPex Jan 10 '17 at 12:43 4 ...
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How can one close HTML tags in Vim quickly?

...y exact rename it to "html.vim" so that it will effect HTML files as well. Now, I have two of the exact same files in ~/.vim/ftplugin (xml.vim and html.vim). – user2719875 Jun 11 '15 at 19:55 ...