modifying a Plist from command line on Mac using Defaults

Question

Does any one know how to modify a Plist file from command line using defaults? Currently there are two Dictionaries under the URL types array; I n

Answer 1

Use the -array-add value type:

defaults write /path/to/plist/file "URL Types" -array-add '{"URL Identifier" = "com.myapp.2"; "URL Schemes" = { "two"; }; }'