• sortClass — It also contains a function which takes the key name as a parameter.
• Using ng-repeat directive for displaying content on table element and defined ng-click directive on each header column for detecting click event on table header.
• sortColumn — It contains a function, which called when table header clicked, it takes the key name as a parameter.
• Use orderBy filter to sort the content of the table when table header gets clicked.
• ng-click and ng-class directives contain a function which takes the key name as a parameter.

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