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javascript flatten nested object concatenate parent keys

Impossible Ibex answered on October 15, 2022 Popularity 1/10 Helpfulness 1/10

answer javascript flatten nested object concatenate parent keys

javascript flatten nested object concatenate parent keys

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// $roots keeps previous parent properties as they will be added as a prefix for each prop.
// $sep is just a preference if you want to seperate nested paths other than dot.
const flatten = (obj, roots = [], sep = '.') => Object
  // find props of given object
  .keys(obj)
  // return an object by iterating props
  .reduce((memo, prop) => Object.assign(
    // create a new object
    {},
    // include previously returned object
    memo,
    Object.prototype.toString.call(obj[prop]) === '[object Object]'
      // keep working if value is an object
      ? flatten(obj[prop], roots.concat([prop]), sep)
      // include current prop and value and prefix prop with the roots
      : {[roots.concat([prop]).join(sep)]: obj[prop]}
  ), {})

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: stackoverflow.com

Tags: flatten javascript nested-object parent

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Contributed on Oct 15 2022

Impossible Ibex

0 Answers Avg Quality 2/10

javascript flatten nested object concatenate parent keys

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