snippet.js

// I want to unset comments.moderated for embedded document in the whole collection
{
	"_id" : ObjectId("4cb7f2d5fe38855e43897d13"),
	"title" : "Blog Examples Considered Harmful",
	"comments" : [
		{
			"by" : "Bob",
			"moderated" : true,
			"text" : "first!"
		},
		{
			"by" : "Jane",
			"moderated" : false,
			"text" : "first!!"
		}
	]
},
{
	"_id" : ObjectId("4cb7f2d5fe38855e43897d13"),
	"title" : "Typical Blog Example",
	"comments" : [
		{
			"by" : "Joe",
			"moderated" : true,
			"text" : "first!"
		},
	]
}