json-micro

A tiny module for the unlikely case when you have:

• JSON style objects
• which you want to turn into JSON strings
• but you only need n digits of accuracy for any number
• and you really want smaller JSON

With those weird goals in mind, this module makes as small a JSON string as possible, while guaranteeing at least n precise digits for all numbers. More than n digits of precision will be included if it doesn't affect the string size.

stringify = require('json-micro').stringify;

data = [
  [ 1.1, 22.22, 333.333, 278394879238794879234487239],
  [ "cat", "dog", Math.PI],
  { "ln2" : Math.LN2}
];

console.log(stringify(data,2));

Outputs:

[[1.1,22,333, 2.8e+26],["cat","dog",3.1],{"ln2":0.69}]

A third argument, spacer, let's you pretty-print for testing.

console.log(stringify(data,3," "));

Outputs

[
 [
  1.1,
  22.2,
  333
 ],
 [
  "cat",
  "dog",
  3.14
 ],
 {
  "ln2": 0.693
 },
 2.78e+26
]

Installation

> npm install -g json-micro