大约有 44,000 项符合查询结果（耗时：0.0858秒） [XML]
Calculate distance between 2 GPS coordinates
How do I calculate distance between two GPS coordinates (using latitude and longitude)?
29 Answers
...
How to pass arguments into a Rake task with environment in Rails? [duplicate]
...ironment using the :needs option. For example:
desc "Testing environment and variables"
task :hello, :message, :needs => :environment do |t, args|
args.with_defaults(:message => "Thanks for logging on")
puts "Hello #{User.first.name}. #{args.message}"
end
Updated per @Peiniau's comment...
wkhtmltopdf: cannot connect to X server
...virtual X server in the static version . I have been using the static (stand-alone) version of the program and it works great! I would put the executable file in a folder, and run:
...
HTML-encoding lost when attribute read from input field
I’m using JavaScript to pull a value out from a hidden field and display it in a textbox. The value in the hidden field is encoded.
...
What is the difference between MySQL Server and MySQL Client
...tu I normally install both but what are the differences between the client and server for MySQL.
3 Answers
...
passing 2 $index values within nested ng-repeat
...
Each ng-repeat creates a child scope with the passed data, and also adds an additional $index variable in that scope.
So what you need to do is reach up to the parent scope, and use that $index.
See http://plnkr.co/edit/FvVhirpoOF8TYnIVygE6?p=preview
<li class="tutorial_title {...
Mark parameters as NOT nullable in C#/.NET?
...pile time to make sure the literal null isn't being used anywhere for it and at run-time throw ArgumentNullException .
6...
Conversion of a datetime2 data type to a datetime data type results out-of-range value
...
I changed my datacolumns and used typeof now... Further I found my problem. there was 1 datarow that contained a wrong date, which triggered the error
– Gerbrand
Aug 26 '09 at 5:46
...
How can I use “puts” to the console without a line break in ruby on rails?
...oothly, you need to flush the stdout buffer after each print...
def print_and_flush(str)
print str
$stdout.flush
end
100.times do
print_and_flush "."
sleep 1
end
Edit: I was just looking into the reasoning behind flush to answer @rubyprince's comment, and realised this could be cleaned u...
What __init__ and self do on Python?
I'm learning the Python programming language and I've came across something I don't fully understand.
18 Answers
...