.Map object callback

// ~~~~~ jQuery.map( object, callback )
//The function to process each item against. The first argument to the function is the array item, 
//the second argument is the index in array the function can return any value. A returned array will be flattened into the resulting array. 

 o.LCItemList = ItemDetails.map(item => {
     return {
         childID: item.childID,
         itemID: item.itemID,
         quantity: item.quantity,
         unitPrice: item.unitPrice,
         isDelete: item.isDelete
     };
 });
 
 // LCItemList Array will be generated form each item of ItemDetails array

get Index By Obj property

//https://www.geeksforgeeks.org/javascript-get-the-index-of-an-object-by-its-property/

let arrayObj = [{
    prop_1: 'val',
    prop_2: 'val_12',
    prop_3: 'val_13'
}, {
    prop_1: 'val',
    prop_2: 'val_22',
    prop_3: 'val_23'
}];
 
function GFG_Fun() {
    let prop = 'prop_2';
    let val = 'val_22';
    console.log("Index of prop = "+ prop + " val = " + val +" is = " +
        arrayObj.map(function (e) {
            return e.prop_2;
        }).indexOf(val));
}
GFG_Fun();

//Output
Index of prop = prop_2 val = val_22 is = 1

//Ral example:
 _.map(PIItemDetails, function (obj) {
     var index = PIItemDetails.map(function (e) { return e.itemDescription; }).indexOf(obj.itemDescription); // here is the index
     obj.serial = index + 1;
     obj.totalAvgWeight = (obj.piQty * obj.avgWeightKGPerUnit);
 });

get JSON Size

 console.log(o);

 const propertyCount = Object.keys(o.GRNChild).length;
 const jsonSize = JSON.stringify(o.GRNChild).length;
 console.log("Number of Child properties: " + propertyCount, "Approximate memory size: " + jsonSize / 10000);

 const propertyCount2 = Object.keys(o).length;
 const jsonSize2 = JSON.stringify(o).length;
 console.log("Number of Object properties: " + propertyCount2, "Approximate memory size: " + jsonSize2 / 10000);

new mixed

var n = 9;
n = String(n).padStart(2, '0');  //"09"

Sorting descending -ascending

// Sorting both ascending & descending way on numeric columns 
TransactionDetails = TransactionDetails.sort(function (a, b) {
    // Column 1 (descending)
    if (a.POBalance < b.POBalance) return 1;
    if (a.POBalance > b.POBalance) return -1;

    // Column 2 (ascending)
    if (a.purchaseIndentID < b.purchaseIndentID) return -1;
    if (a.purchaseIndentID > b.purchaseIndentID) return 1;
            
    return 0;
});