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Ruby on Rails: How can I revert a migration with rake db:migrate?
...mber means the SHA(Secure Hash Algorithm) for the commit which is a long hexadecimal number which looks something like 886af3194768917c78e... You can see it by doing git log
You can see these commands (and others) with their descriptions by using rake -T db: which for rails 3.2 includes:
rake db:m...
Passing parameters in rails redirect_to
... You can't redirect with a POST. From the HTTP 1.1 docs under the 3xx definitions: "The action required MAY be carried out by the user agent without interaction with the user if and only if the method used in the second request is GET or HEAD." Expand on what you're really trying to accompl...
Multi-gradient shapes
...
I don't think you can do this in XML (at least not in Android), but I've found a good solution posted here that looks like it'd be a great help!
ShapeDrawable.ShaderFactory sf = new ShapeDrawable.ShaderFactory() {
@Override
public Shader resize(int ...
The command rbenv install is missing
...ub.com/rbenv/ruby-build.git "$(rbenv root)"/plugins/ruby-build
On Mac OS X you can install it through homebrew:
brew install ruby-build
On Debian (version >= 7) and Ubuntu (version >= 12.10) both rbenv and ruby-build can be installed using apt-get (or aptitude):
sudo apt-get update
sudo ...
How can I “unuse” a namespace?
...do is putting the using namespace-statement a block to limit it's scope.
Example:
{
using namespace xyzzy;
} // stop using namespace xyzzy here
Maybe you can change the template which is used of your auto-generated headers.
...
AsyncTask threads never die
...
AsyncTask manages a thread pool, created with ThreadPoolExecutor. It will have from 5 to 128 threads. If there are more than 5 threads, those extra threads will stick around for at most 10 seconds before being removed. (note: these figures are for the presently-visible open source ...
Generate UML Class Diagram from Java Project [closed]
...ation of UML giving the source code. This tool is useful up to Eclipse 4.4.x
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Why does (i
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i <= j is evaluated to true, because auto unboxing happens for int
comparisons and then both i and j hold the default value, 0.
j <= i is evaluated to true because of the above reason.
i != j is evaluated to true, because both i and j are
different objects. And while ...
git-svn not a git command?
...n. See this SO question.
Update: with a modern (2017) Git for Windows 2.x, git svn is already included.
No need for sudo apt-get install git-svn, which would only be possible in a WSL (Windows Subsystem for Linux) shell session anyway.
...
Change font size macvim?
...De Ja Vu Vera on my system. Huh. Thanks anyhow!
– Alex
May 22 '10 at 4:02
@Alex: That's interesting. Looks like the do...