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+#### Search and return only certain fields
+
+Search by regular expression (use the slash or quote marks as a delimiter).
+@{"name": {$regex: /^M.*/}}
+
+Case insensitive:
+@{"name": {$regex: /^jan.*/, $options: "i"}}
+
+Find by elements in array
+This matches documents that contain all of these array elements:
+@{"skills": {$all: }}
+
+Match on any element in the array:
+@{"skills": "negotiation"}