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undefined method `source_index' for Gem:Module (NoMethodError)
...st ran into this problem myself while trying to upgrade an older Rails app from REE 1.8.7 to 1.9.3-p385. Oddly, Ruby 1.9.3-p327 works just fine. What it came down to was ruby-1.9.3-p385 had installed RubyGems version 2.0.2 for me, and 1.9.3-p327 has RubyGems v1.8.23 installed.
Gem.source_index has ...
Android ACTION_IMAGE_CAPTURE Intent
...ptureBug()) {
i.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File("/sdcard/tmp")));
} else {
i.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
}
startActivityForResult(i, mRequestCode);
then in activi...
How to get the current directory in a C program?
... a C program where I need to get the directory that the program is started from. This program is written for UNIX computers. I've been looking at opendir() and telldir() , but telldir() returns a off_t (long int) , so it really doesn't help me.
...
How to properly document S4 class slots using Roxygen2?
... \item{\code{slot1}:}{Matrix of class \code{"numeric"}, containing data from slot1}
#' \item{\code{slot2}:}{Object of class \code{"character"}, containing data that needs to go in slot2.}
#' }
#'
#' @note You can still add notes
#' @name EXAMPLE
#' @rdname EXAMPLE
#' @aliases EXAMPLE-class
#...
How to verify a user's password in Devise
...ing to find user by password, but I don't understand how to match password from form and encrypted_password in my db.
4 Ans...
Accessing an array out of bounds gives no error, why?
...ecking, there are a couple aspects to the answer:
An array is a leftover from C. C arrays are about as primitive as you can get. Just a sequence of elements with contiguous addresses. There is no bounds checking because it is simply exposing raw memory. Implementing a robust bounds-checking mechan...
How to generate JAXB classes from XSD?
... web feeds. A standard format allows reader applications to display feeds from different sources. In this example we will process the Atom feed for this blog.
Demo
In this example we will use JAXB to convert the Atom XML feed corresponding to this blog to objects and then back to XML.
import ja...
How to convert an enum type variable to a string?
...
@AdN That design is wrong. The mapping from enum to human-readable string shouldn't be implemented as an array of strings indexed by the enum value. Your experience (presumably) shows why. The mapping should be an explitiy array of (enum,string) pairs, so if you f...
In Jinja2, how do you test if a variable is undefined?
Converting from Django, I'm used to doing something like this:
6 Answers
6
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Pandas DataFrame Groupby two columns and get counts
...lt of the groupby size method is a Series with col5 and col2 in the index. From here, you can use another groupby method to find the maximum value of each value in col2 but it is not necessary to do. You can simply sort all the values descendingly and then keep only the rows with the first occurren...