3 Days of Data Science Blog Entry Snippets

Flat_Data.json

[
  { "iface" : "HTMLElement", "member": "className", "owner": "Jim" },
  { "iface" : "SVGElement", "member": "className", "owner": "Joe" },
  { "iface" : "SVGElement", "member": "style", "owner": "Jim" },
]

Hierarchical_Data.json

{
  "HTMLElement" : {
    "className": {
      "owner" : "Jim"
    }
  },
  "SVGElement" : {
    "className": {
      "owner" : "Joe"
    },
    "style": {
      "owner" : "Jim"
    }
  }
}

UseFlat.js

var myData = require('./Flat_Data.json');
var filtered = myData.filter(function (row) {
  // Hard-coding, but this could easily be keyed and this filter function could be generic
  return (row.owner === "Jim");
}).reduce(function (prev, curr) {
  // Hard-coding again, but this could by keyed yet again
  if (!prev.hasOwnProperty(curr.iface)) {
    prev[curr.iface] = [];
  }
  prev[curr.iface].push(curr);
  return prev;
}, {});