Quick queries over json files...

adhoc.js

const {
    chain,
    filter,
    count,
    groupBy,
    map
} = require("./chaining")


const transforms = [
    map(x => ({
        pono: x.productionOrderNumber,
        eisn: x.endItemSerialNumber,
        pos: x.componentItemPosition,
        alias: x.alias,
    })),
    groupBy(x => x.pos)
    // count
]


console.log(chain(require("./jsonfiles/1.json"), ...transforms))
console.log("----")
console.log(chain(require("./jsonfiles/2.json"), ...transforms))

chaining.js

// Chaining method
const chain = (obj, op = obj => obj, ...restOps) => restOps.length > 0
    ? chain(op(obj), ...restOps)
    : op(obj)

// Example methods to chain
const filter = predicate => (collection) => collection.filter(predicate)

const count = collection => collection.length

const groupBy = keyExtractor => collection => collection.reduce((acc, cur) => {
    acc[keyExtractor(cur)] = [...(acc && acc[keyExtractor(cur)] || []), cur]
    return acc
}, {})

const map = mapFn => collection => collection.map(mapFn)

// Export the methods
module.exports = {chain, filter, count, groupBy, map}

Usage:

node adhoc.js