Web Directions
Conffab
Speakers
Presentations
Conferences
Topics
Pricing & Plans
Browse
Signup
Sign In
Speakers
Presentations
Conferences
Topics
Pricing & Plans
Browse
Signup
Sign In
Advanced Search
Searching videos
Categories (
0
)
Speakers (
0
)
Directors (
0
)
optional chaining
Optional Chaining and Null Coalescing, a Golden Duo
