array-rip.js

#!/usr/bin/env node
var fs = require('fs');
var _ = require('underscore');

fs.readFile('area.json',function(err,data) {
	var a = JSON.parse(data);
	console.log(a.length);
	var b = _.map(a,function(row) {
		var o = new Object();
		o.area = row.at4;
		o.node = row.at9;
		return o;
	});
	console.log(b.length);
	
	fs.writeFile('area2.json',JSON.stringify(b),function() {
		console.log("Done!");
	});
});