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Rollback to an old Git commit in a public repo
How can I go about rolling back to a specific commit in git ?
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Select N random elements from a List in C#
I need a quick algorithm to select 5 random elements from a generic list. For example, I'd like to get 5 random elements from a List<string> .
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JPA: How to have one-to-many relation of the same Entity type
There's an Entity Class "A". Class A might have children of the same type "A". Also "A" should hold it's parent if it is a child.
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How to open a specific port such as 9090 in Google Compute Engine
I have 2 Google Compute Engine instances and I want to open port 9090 in both the instances. I think we need to add some firewall rules.
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Set type for function parameters?
Is there a way to let a javascript function know that a certain parameter is of a certain type?
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Git commits are duplicated in the same branch after doing a rebase
I understand the scenario presented in Pro Git about The Perils of Rebasing . The author basically tells you how to avoid duplicated commits:
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Static method in a generic class?
In Java, I'd like to have something as:
11 Answers
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how to use ng-option to set default value of select element
I've seen the documentation of the Angular select directive here: http://docs.angularjs.org/api/ng.directive:select .
I can't figure how to set the default value. This is confusing:
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Combining multiple git repositories
Let's say I've got a setup that look something like
13 Answers
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Summarizing multiple columns with dplyr? [duplicate]
I'm struggling a bit with the dplyr-syntax. 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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