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aeinbu/adhoc.js

Last active January 8, 2023 10:48
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  1. aeinbu revised this gist Jul 27, 2022. No changes.
  2. aeinbu created this gist Jul 27, 2022.
    24 changes: 24 additions & 0 deletions adhoc.js
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    Original file line number Diff line number Diff line change
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    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))
    19 changes: 19 additions & 0 deletions chaining.js
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    // 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}