TheClimateCorporation/unicorn-metrics — pull request #1 by lumberj (2014-05-17 15:06:24+00:00)
Title: Add a Gauge type

Gauge returns the value of evaluating a block.

```ruby
UnicornMetrics.register(:gauge, "test_gauge") { 5 }
```

```ruby
# In configuration
UnicornMetrics.configure do |c|
c.register(:gauge, "test_gauge") { 10 }
end
```