R: Create handler for processing JSON elements from a parser

basicJSONHandler {RJSONIO} | R Documentation

## Create handler for processing JSON elements from a parser

### Description

This function creates a handler object that is used to consume tokens/elements from a JSON parser and combine them into R objects.

This is slow relative to using C code because this is done in R and also we don't know the length of each object until we have consumed all its elements.

### Usage

    basicJSONHandler(default.size = 100, simplify = FALSE)

### Arguments

`default.size` | the best guess as to the sizes of the different elements. This is used for preallocating space for elements
`simplify` | a logical value indicating whether to simplify arrays from lists to vectors if the elements are of compatible types.

### Value

`update` | a function called with a JSON element and used to process that element and add it to the relevant R object
`value` | a function to retrieve the result after processing the JSON

### Author(s)

Duncan Temple Lang

### See Also

`fromJSON` and the handler argument.

### Examples

      h = basicJSONHandler()
      x = fromJSON("[1, 2, 3]", h)
      x
      h$value()

[Package RJSONIO version 1.3-0 Index]