find key paths in object with numeric value

find-keys-with-numeric-value.js

const findKeysWithNumericValue = (obj, keyPath = "") => {
  const keys = Object.keys(obj)
  const numericKeys = []
  const preKey = keyPath.length > 0 ? `${keyPath}.` : ""

  for (let k of keys) {
      const value = obj[k]
      if (typeof value === "number") {
        numericKeys.push(`${preKey}${k}`)
      } else if (typeof value === "object") {
        numericKeys.push(...findKeysWithNumericValue(value, `${preKey}${k}`))
      }
  }

  return numericKeys
}