typescript get sum of array elements Edit
How to find the sum of elements in an array in angular. In the typescript code below, typescript has an inbuild reduce method to get the sum of array elements. A reduced method reduces the array to a single value.
this.subTotal = this.salesReturnDetail.reduce((sum,current)=> sum current.ReturnTotal,0);
reduce takes two parameters
array.reduce(callback[, initialValue]); callback - Function to execute on each value in the array. initialValue - Object to use as the first argument to the first call of the callback.