大约有 44,000 项符合查询结果（耗时：0.0750秒） [XML]
Convert a row of a data frame to vector
...he one-row data frame to a numeric vector without dropping the names. Therefore unname(unlist(df[1,])) is another, slightly more explicit way to get to the same result.
As @Josh comments below, if you have a not-completely-numeric (alphabetic, factor, mixed ...) data frame, you need as.character(df...
Differences between distribute, distutils, setuptools and distutils2?
...remember to look at the date of publication, and don't trust out-of-date information.
The Python Packaging User Guide is worth a read. Every page has a "last updated" date displayed, so you can check the recency of the manual, and it's quite comprehensive. The fact that it's hosted on a subdomain o...
How to add NERDTree to your .vimrc
...
Okay, the previous version was a bit terse, but the answer you're looking for is to add the line below into your ~/.vimrc file. It tells Vim that you want to setup a command to run when Vim starts, but since it depends on various plugins to be loaded, you don't want to run it until all initializat...
Is onload equal to readyState==4 in XMLHttpRequest?
...asically means the load process has finished, whether successfully or not. For a normal, successful load, the final sequence of events is: progress (with all data loaded), readystatechange (with readyState == 4), load, loadend.
– Fernando Echeverria
May 2 '17 a...
What is the difference (if any) between Html.Partial(view, model) and Html.RenderPartial(view,model)
...l see that they both call the same internal method, passing a StringWriter for it to render to.
You would call Partial if you want to view, save, or manipulate the generated HTML instead of writing it to the page.
share
...
Draw radius around a point in Google map
...mple you referenced uses this method. This page has a good example - look for the function drawCircle in the source code.
share
|
improve this answer
|
follow
...
Can't delete virtual device from Eclipse, android
...
Works the same for OSX. In terminal Go to ~/.android/avd/ then delete the <avd name>.ini and <avd name>.avd files. When you refresh the list in the Android Virtual Devices window the ADV will be gone.
– Jos...
Get Base64 encode file-data from Input Form
I've got a basic HTML form from which I can grab a bit of information that I'm examining in Firebug.
6 Answers
...
How to Test a Concern in Rails
...
# spec/concerns/personable_spec.rb
require 'spec_helper'
shared_examples_for "personable" do
let(:model) { described_class } # the class that includes the concern
it "has a full name" do
person = FactoryBot.build(model.to_s.underscore.to_sym, first_name: "Stewart", last_name: "Home")
...
Can you get DB username, pw, database name in Rails?
...hin rails you can create a configuration object and obtain the necessary information from it:
config = Rails.configuration.database_configuration
host = config[Rails.env]["host"]
database = config[Rails.env]["database"]
username = config[Rails.env]["username"]
password = config[Rails.env]["pa...