const deepSet = (obj, path, value) => {
  const elements = (Array.isArray(path) && path) || path.split('.')

  if (elements.length > 1) {
    obj[elements[0]] = ((!obj.hasOwnProperty(elements[0]) || typeof obj[elements[0]] !== 'object') && {} ) || obj[elements[0]]
    deepSet(obj[elements[0]], elements.slice(1), value)
  } else {
    obj[elements[0]] = value
  }

  return obj
}

const flatDataToObject = (flatData, dataModel) => {
  const rowLength = Array.isArray(flatData) && flatData[0] && Array.isArray(flatData[0]) && flatData[0].length;
  const modelLength = Array.isArray(dataModel) && dataModel.length

  return rowLength === modelLength && flatData.reduce((accRow, currRow) => [
    ...accRow, currRow.reduce((accCol, currCol, currIdx) => deepSet(accCol, dataModel[currIdx], currCol), {})
  ], [])
}

// Test
const flatData = [
  ['this1', 'that1', 'the1', 'other1', 'thing1', 'thang1', 1, 'end1'],
  ['this2', 'that2', 'the2', 'other2', 'thing2', 'thang2', 2, 'end2'],
  ['this3', 'that3', 'the3', 'other3', 'thing3', 'thang3', 3, 'end3'],
  ['this4', 'that4', 'the4', 'other4', 'thing4', 'thang4', 4, 'end4'],
  ['this5', 'that5', 'the5', 'other5', 'thing5', 'thang5', 5, 'end5']
]

const dataModel = [
  'omg.this.that',
  'what.is.this',
  'omg.this.spoon.is.too.big',
  'omg.this.all.there.is',
  'omg.that.thing',
  'omg.this.works',
  'omg.fine.be.that.way',
  'omg.fine.be.that.thing'
]

const test = flatDataToObject(flatData, dataModel)
console.log(JSON.stringify(test, null, 2))

/*
[
  {
    "omg": {
      "this": {
        "that": "this1",
        "spoon": {
          "is": {
            "too": {
              "big": "the1"
            }
          }
        },
        "all": {
          "there": {
            "is": "other1"
          }
        },
        "works": "thang1"
      },
      "that": {
        "thing": "thing1"
      },
      "fine": {
        "be": {
          "that": {
            "way": 1,
            "thing": "end1"
          }
        }
      }
    },
    "what": {
      "is": {
        "this": "that1"
      }
    }
  },
  {
    "omg": {
      "this": {
        "that": "this2",
        "spoon": {
          "is": {
            "too": {
              "big": "the2"
            }
          }
        },
        "all": {
          "there": {
            "is": "other2"
          }
        },
        "works": "thang2"
      },
      "that": {
        "thing": "thing2"
      },
      "fine": {
        "be": {
          "that": {
            "way": 2,
            "thing": "end2"
          }
        }
      }
    },
    "what": {
      "is": {
        "this": "that2"
      }
    }
  },
  {
    "omg": {
      "this": {
        "that": "this3",
        "spoon": {
          "is": {
            "too": {
              "big": "the3"
            }
          }
        },
        "all": {
          "there": {
            "is": "other3"
          }
        },
        "works": "thang3"
      },
      "that": {
        "thing": "thing3"
      },
      "fine": {
        "be": {
          "that": {
            "way": 3,
            "thing": "end3"
          }
        }
      }
    },
    "what": {
      "is": {
        "this": "that3"
      }
    }
  },
  {
    "omg": {
      "this": {
        "that": "this4",
        "spoon": {
          "is": {
            "too": {
              "big": "the4"
            }
          }
        },
        "all": {
          "there": {
            "is": "other4"
          }
        },
        "works": "thang4"
      },
      "that": {
        "thing": "thing4"
      },
      "fine": {
        "be": {
          "that": {
            "way": 4,
            "thing": "end4"
          }
        }
      }
    },
    "what": {
      "is": {
        "this": "that4"
      }
    }
  },
  {
    "omg": {
      "this": {
        "that": "this5",
        "spoon": {
          "is": {
            "too": {
              "big": "the5"
            }
          }
        },
        "all": {
          "there": {
            "is": "other5"
          }
        },
        "works": "thang5"
      },
      "that": {
        "thing": "thing5"
      },
      "fine": {
        "be": {
          "that": {
            "way": 5,
            "thing": "end5"
          }
        }
      }
    },
    "what": {
      "is": {
        "this": "that5"
      }
    }
  }
]
*/