EVAL: paramaters as an array support

[dmoena]

EVAL function overwrite on index.js (:1068) caused lost of support to handle parameters as an array ( [ param1, param2, ... , paramN ], callback), since assumes all of them will be passed on extended format ( param1, param2, ... , paramN, callback ).

I added a simple validation to make it compatible. Also, updated example code to probe and show how this two formats works fine now.

Ready to merge checklist

• test(s) in test.js
• tests will fail without the PR, but succeed once applied
• docs, if applicable
• merges cleanly
• coding style (4-space indents, looks similar to other code)

[DTrejo]

Looks good, could you add a test to tests.js? I added a little checklist so you can see how close this is to being merged.

[dmoena]

Hey, while working on the test, I got some of them failing. After checking redis' site, I know what the problem is.

Basically,"Errors inside a transaction" at http://redis.io/topics/transactions states that version 2.6.5+ handles errors on a different way. Now, if you get an error, the whole transaction fails, as opposite to previous (and tested) behavior.

I already made some changes, but while doing that, I start to think that you might want to deal with this in a different way (I basically migrate all failing tests to make them 2.6.5+ compatible). Also, you might want to have this in a different pull request...

Let me know your decision and how can I help.

[brycebaril]

@dmoena I have a fix for making the tests 2.6.5+ compatible already, will be submitted as a PR soon. In the meantime feel free to comment out MULTI_1 and MULTI_2 tests in your workspace.

[dmoena]

I commented failing tests locally, just to add mine. Comments were removed before commit.

[DTrejo]

Thank you!
D