getMinOrMaxFromJson.js

 

// Return min or max key's value
// calendar_date is just an example placeholder.
// result.recordet is array of JSON Object.
var minNum = Math.min.apply( Math, result.recordset.map( function ( o ) { return o.calendar_date; } ) );
var maxNum = Math.max.apply( Math, result.recordset.map( function ( o ) { return o.calendar_date; } ) );


// Return entire JSON Object.
// calendar_date is just an example placeholder.
// result.recordet is array of JSON Object.
const min = result.recordset.reduce( function findMin( prev, current ) {
 return ( prev.calendar_date < current.calendar_date ) ? prev : current;
} ); // return object.

const max = result.recordset.reduce( function findMax( prev, current ) {
 return ( prev.calendar_date > current.calendar_date ) ? prev : current;
} ); // return object.