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Delete specific line number(s) from a text file using sed?
I want to delete one or more specific line numbers from a file. How would I do this using sed?
6 Answers
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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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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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Good PHP ORM Library?
Is there a good object-relational-mapping library for PHP?
36 Answers
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Import text file as single character string
How do you import a plain text file as single character string in R? I think that this will probably have a very simple answer but when I tried this today I found that I couldn't find a function to do this.
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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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Rollback to an old Git commit in a public repo
How can I go about rolling back to a specific commit in git ?
11 Answers
11
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Call a python function from jinja2
I am using jinja2, and I want to call a python function as a helper, using a similar syntax as if I were calling a macro. jinja2 seems intent on preventing me from making a function call, and insists I repeat myself by copying the function into a template as a macro.
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Uses for the Java Void Reference Type?
There is a Java Void -- uppercase V-- reference type . The only situation I have ever seen it used is to parameterize Callable s
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pod install -bash: pod: command not found
I installed pod some time ago. However, it's stopped working so I'm working through this again.
21 Answers
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