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Comment out text in R Markdown (Rmd file)

In an R Markdown ( .Rmd ) file, how do you comment out unused text? I'm not referring to the text in the R code chunk, but the general texts, like % in LaTex for example. ...
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How to use pip with Python 3.x alongside Python 2.x

I installed Python 3.x (besides Python 2.x on Ubuntu) and slowly started to pair modules I use in Python 2.x. 10 Answers ...
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How to Use Order By for Multiple Columns in Laravel 4?

I want to sort multiple columns in Laravel 4 by using the method orderBy() in Laravel Eloquent. The query will be generated using Eloquent like this: ...
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“used as value” in function call

What's the proper way of calling functions when evaluating their values in conditional statements? 1 Answer ...
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Tuning nginx worker_process to obtain 100k hits per min

We have a server that is serving one html file. 1 Answer 1 ...
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How to go back to lines edited before the last one in Vim?

I'm aware of the `. command that goes to last edited line. Is there a way to go further in the editing history? I often accidentally insert something while browsing the file, undo, but then `. will not bring me where I want anymore. ...
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Android Studio needs JDK 7 for Android-L mac

I was trying to look how my app looks in material design and I would like to use the new cards lib. My Problem is, that it's giving me this error within my gradle file and I need to fix that. ...
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How to get the home directory in Python?

I need to get the location of the home directory of the current logged-on user. Currently, I've been using the following on Linux: ...
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Datepicker: How to popup datepicker when click on edittext

I want to show datepicker popup window. I have found some examples but i am not getting it properly. I have one edittext and i want that when i click on edittext the datepicker dialog should popup and after setting the date, the date should show in edittext in dd/mm/yyyy format. PLease provide me sa...
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How to get execution time in rails console?

I want compare time of execution Post.all and SELECT * FROM posts (or some other statements) How can i get execution time of Post.all ? ...