Usage

let array = [[“company” = “apple”, “empID” : “E10”],
[“company” = “apple”, “empID” : “E10”],
[“company” = “apple”, “empID” : “E12”],
[“company” = “apple”, “empID” : “E13”],
[“company” = “apple”, “empID” : “E14”],
[“company” = “microsoft”, “empID” : “E106”],
[“company” = “microsoft”, “empID” : “E103”],
[“company” = “google”, “empID” : “E17”],
[“company” = “google”, “empID” : “E19”],
[“company” = “google”, “empID” : “E122”]]

let groupedByCompany = array.groupBy(“company”)

/*
Returns:
[“apple”: [“E10”, “E12”, “E13”, “E14”],
“microsoft”: [“E106”, “E103],
“google”: [“E17”, “E19”, “E122”]]
*/

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