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You have already activated rake 0.9.0, but your Gemfile requires rake 0.8.7
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First, check to make sure that rake is mentioned in your Gemfile. If it's not, add it, and specify the version "you already activated".
Then, you'll need to tell bundle to update the rake version it's using for your app:
bundle update rake
It'll update your Gemfile.lock for you.
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How to un-submodule a Git submodule?
What are the best practices for un-submoduling a Git submodule, bringing all the code back into the core repository?
12 Ans...
How can I get jQuery to perform a synchronous, rather than asynchronous, Ajax request?
...des standard extension points. One of them is the beforecreate function. It should return false to prevent an item from being created.
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How to use java.net.URLConnection to fire and handle HTTP requests?
... about pretty often here, and the Oracle tutorial is too concise about it.
11 Answers
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Determining the size of an Android view at runtime
... am trying to apply an animation to a view in my Android app after my activity is created. To do this, I need to determine the current size of the view, and then set up an animation to scale from the current size to the new size. This part must be done at runtime, since the view scales to differen...
Change Name of Import in Java, or import two classes with the same name
...re is no import aliasing mechanism in Java. You cannot import two classes with the same name and use both of them unqualified.
Import one class and use the fully qualified name for the other one, i.e.
import com.text.Formatter;
private Formatter textFormatter;
private com.json.Formatter jsonForma...
How to disable text selection highlighting
...ect is currently supported in all browsers except Internet Explorer 9 and its earlier versions (but sadly still needs a vendor prefix).
These are all of the available correct CSS variations:
.noselect {
-webkit-touch-callout: none; /* iOS Safari */
-webkit-user-select: none; /* Safari */...
Compiled vs. Interpreted Languages
...is expressed in the instructions of the target machine. For example, an addition "+" operation in your source code could be translated directly to the "ADD" instruction in machine code.
An interpreted language is one where the instructions are not directly executed by the target machine, but instea...
How to highlight and color gdb output during interactive debugging?
...use ddd, nemiver, emacs, vim, or any other front-end, I just prefer gdb as it is, but would like to see its output with some terminal colors.
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How do I commit case-sensitive only filename changes in Git?
I have changed a few files name by de-capitalize the first letter, as in Name.jpg to name.jpg . Git does not recognize this changes and I had to delete the files and upload them again. Is there a way that Git can be case-sensitive when checking for changes in file names? I have not made any chan...