R: Example PEG

peg_sum {piton} | R Documentation

## Example PEG

### Description

an example of a Parsing Expression Grammar (PEG) that takes a comma-separated string of digits and sums them together

### Usage

    peg_sum(x)

### Arguments

`x` | a vector of strings, each containing a comma-separated set of digits

### Value

a vector of numbers, containing either the sum of the equivalent element of `x` or (if the element could not be parsed) `NA`.

### Examples

    # Simple example
    peg_sum("1,2, 5, 91, 34")

[Package piton version 0.1.1 Index]