feat(Array): add support for some, find & filter

[vicb]

@alexeagle @mprobst I would need some help with this one.

The tests currently fails with "access to untyped property..." If I add the Array interface with the find method as this is done for the the Map, the error disappears but find is not translated to firstWhere.

[mprobst]

I presume this doesn't work because:

• Array.find is an ES6 thing, so it's not just available on Array.prototype
• When you add it like the Map stuff in the test, it's not defined in lib.d.ts

If these are ES6-isms, do we actually have a shim/polyfill that implements them for Angular? Where is that defined? Should we just use those definitions as the location?

[vicb]

@mprobst could you please check the latest updates (thanks for the tips).

[vicb]

Hum interesting...

I had to revert to clang-format 1.0.29 locally because Travis would fail (I had 1.0.30 installed) on this PR.

• This PR used to pass earlier with the same formatting on this repo,
• My local repo (vicb) fails with the current code - it uses 1.0.30

Any idea ?

[mprobst]

Code LGTMs.

If you want to use a newer clang-format, you have to update the NPM version; clang-format should normally use the version that is installed to ./node_modules. I guess we should upgrade, we had some useful changes in clang-format.

[vicb]

I will check this version within Angular before merging.

[vicb]

Tested with Angular, works fine.

/cc @mprobst @alexeagle

[alexeagle]

Go ahead and merge (this repo doesn't have any presubmit fanciness)

[vicb]

@alexeagle I agree about the test and I think this has caused issues in the past. I have tested this particular PR within angular so I do not expect issue but I agree we could & should do a better job.

I'll amend the commit with Array.reduce & merge. Thanks for the review.