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Showing content from https://github.com/mafintosh/objectstruct below:

mafintosh/objectstruct: schema based object encoding/decoding using varstruct that supports strings, booleans etc

schema based object encoding/decoding using varstruct that supports strings, booleans etc

var ostruct = require('objectstruct')

var example = ostruct({
  hello: 'string',
  list: [{           // [type] donates an array
    a: 'boolean',
    b: 'number',     // you can also set DoubleBE etc
    c: 'integer'     // uses a varint
  }],
  data: 'bytes'      // expect a Buffer object
  foo: {             // a nested object
    bar: 'boolean'
  }
})

var buf = example.encode({
  hello: 'world',
  list: [{
    a: true,
    b: 10.0,
    c: 10000
  }, {
    b: 1
  }],
  foo: {
    bar: true
  },
  data: new Buffer('test')
})

console.log(buf) // prints a buffer

var parsed = example.decode(buf)

console.log(parsed) // prints an object similar to above

In addition to the encodings supported by varstruct (UInt32BE etc) the following encodings/aliases are supported as well

• string
• boolean
• bytes (or buffer)
• number (or double or DoubleBE)
• integer (or varint)

Use [some-type] in the schema declaration to specify an array

The following default values are using if your encoded objects misses a property specified in the schema

• string = ""
• boolean = false
• bytes = new Buffer(0)
• number = 0 (same for all numbers)
• array = []
• object = {}

MIT

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