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You have already activated X, but your Gemfile requires Y
...to do this.
Basically what's happening is that you've updated rake to 0.9.2 which now conflicts with the version specified in your Gemfile. Previously the latest version of rake you had matched the version in your Gemfile, so you didn't get any warning when simply using rake.
Yehuda Katz (one of t...
Creating my own Iterators
...ors. I have written an article about this very topic; it's in the December 2008 ACCU magazine. It discusses an (IMO) elegant solution for exactly your problem: exposing member collections from an object, using Boost.Iterators.
If you want to use the stl only, the Josuttis book has a chapter on impl...
Google Sheets API Setup · App Inventor 2 中文网
...te a Service Account
1. Create a Google Developer Account
2. Create a Google Developer Project
3. Enable the Google Sheeets API
4. Creating a Service Acccount
Linking the Google Sheets Document
1. Create the Google Sheets Document
2. Share the ...
Overriding == operator. How to compare to null? [duplicate]
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255
Use object.ReferenceEquals(person1, null) instead of the == operator:
public static bool oper...
Uncaught TypeError: undefined is not a function on loading jquery-min.js
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answered Jun 4 '12 at 15:42
DustinDustin
1,81611 gold badge1010 silver badges33 bronze badges
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How to find the JVM version from a program?
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128
System.getProperty("java.version") returns what you need.
You can also use JMX if you want:
...
fetch in git doesn't get all branches
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edited May 23 '17 at 12:26
Community♦
111 silver badge
answered Sep 19 '14 at 20:25
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invalid multibyte char (US-ASCII) with Rails and Ruby 1.9
I'm using Ruby 1.9.1 with Rails 2.3.4 My application is to handle text input
6 Answers
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Is there any way to use a numeric type as an object key?
... a string via the toString method.
> var foo = {}
undefined
> foo[23213] = 'swag'
'swag'
> foo
{ '23213': 'swag' }
> typeof(Object.keys(foo)[0])
'string'
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