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How do I install an R package from source?
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If you have the file locally, then use install.packages() and set the repos=NULL:
install.packages(path_to_file, repos = NULL, type="source")
Where path_to_file would represent the full path and file name:
On Windows it will look something like this: "C:\\RJSONIO_0.2-3.tar.gz".
O...
Many-to-many relationship with the same model in rails?
...connection.save!
=> true
Instead of creating the association and then setting the category separately, you can also just create a PostConnection and be done with it:
>> b.posts = []
=> []
>> PostConnection.create(
?> :post_a => b, :post_b => a,
?> :category =>...
How can I get jQuery to perform a synchronous, rather than asynchronous, Ajax request?
...tion to be false to get a synchronous Ajax request. Then your callback can set some data before your mother function proceeds.
Here's what your code would look like if changed as suggested:
beforecreate: function (node, targetNode, type, to) {
jQuery.ajax({
url: 'http://example.com/cat...
git clone through ssh
... clone ssh://git@github.com/<user>/<repository name>.git
For setting up git to clone via ssh see:
Generating SSH Keys and add your generated key in Account Settings -> SSH Keys
Cloning with SSH
share
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How can I unit test a GUI?
...g OpenGL to new hardware, they had a bunch of unit tests that would draw a set of primatives to the screen then compute an MD5 sum of the frame buffer. This value could then be compared to known good hash values to quickly determine if the API is per pixel accurate.
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How do I revert a Git repository to a previous commit?
...tching branches, you'll have to deal with them as appropriate. You could reset to throw them away; you could stash, checkout, stash pop to take them with you; you could commit them to a branch there if you want a branch there.)
Hard delete unpublished commits
If, on the other hand, you want to reall...
Why (0-6) is -6 = False? [duplicate]
...o allows you to configure whether to enable this integer caching, and even set the lower and upper bounds. But in general, objects retrieved from different origins will not be identical. If you want to compare equality, just use ==.
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Changing navigation bar color in Swift
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After updating to the newer Xcode betas, setting the title text colour no longer works. titleTextAttributes is not available in Swift. Any ideas?
– user3746428
Aug 1 '14 at 13:28
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How to join (merge) data frames (inner, outer, left, right)
...you, you should also look into the data.table package - that's a whole new set of join syntax, but it's radically faster than anything we're talking about here.
– Matt Parker
Feb 12 '13 at 16:22
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How do I step out of a loop with Ruby Pry?
I'm using Pry with my Rails application. I set binding.pry inside a loop in my model to try and debug a problem. For example:
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