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Delete all local changesets and revert to tree

I'm using Mercurial and I've got into a terrible mess locally, with three heads. I can't push, and I just want to delete all my local changes and commits and start again with totally clean code and a clean history. ...
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Where do I use delegates? [closed]

What are some real world places that call for delegates? I'm curious what situations or patterns are present where this method is the best solution. No code required. ...
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How to cancel an $http request in AngularJS?

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Java Generics: Cannot cast List to List? [duplicate]

Just come across with this problem: 10 Answers 10 ...
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How to handle exceptions in a list comprehensions?

I have some a list comprehension in Python in which each iteration can throw an exception. 6 Answers ...
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How to undo “git commit --amend” done instead of “git commit”

I accidentally amended my previous commit. The commit should have been separate to keep history of the changes I made to a particular file. ...
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Make .gitignore ignore everything except a few files

I understand that a .gitignore file cloaks specified files from Git's version control. I have a project (LaTeX) that generates lots of extra files (.auth, .dvi, .pdf, logs, etc) as it runs, but I don't want those to be tracked. ...
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Get a list of all git commits, including the 'lost' ones

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Testing modules in rspec

What are the best practices on testing modules in rspec? I have some modules that get included in few models and for now I simply have duplicate tests for each model (with few differences). Is there a way to DRY it up? ...
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Specify sudo password for Ansible

How do I specify a sudo password for Ansible in non-interactive way? 23 Answers 23 ...