isUndefined

<p>Helper function to check if a variable is undefined or NULL.</p>

Work with 'Frictionless Data Packages' (<https://specs.frictionlessdata.io//data-package/>). Allows to load and validate any descriptor for a data package profile, create and modify descriptors and provides expose methods for reading and streaming data in the package. When a descriptor is a 'Tabular Data Package', it uses the 'Table Schema' package (<https://CRAN.R-project.org/package=tableschema.r>) and exposes its functionality, for each resource object in the resources field.

Kleanthis Koupidis

datapackage.r

Data Package 'Frictionless Data'

Lazaros Ioannidis

Charalampos Bratsas

Open Knowledge International 

isUndefined function

Check if a variable is undefined or NULL — isUndefined

Check if a variable is undefined or NULL

isUndefined: Check if a variable is undefined or NULL

Description

Usage

Arguments

Value