assign-check-sha1: Assign read in data with creating/checking SHA1 sum

In cszang/fridge: Data analyis project management with R

Description

This infix function creates a normal assignment as side effect, but also checks the read in data against a previously cached SHA1 sum (if available), or creates the SHA1 sum in the first place. When SHA1 sums differ, a warning will be issued.

Usage

x %<c-% value

Arguments

x	unquoted expression naming variable to create
value	unquoted expression to evaluate the first time name is accessed

Examples

## Not run: 
x %<c-% read.csv("some_file.csv")

## End(Not run)

cszang/fridge documentation built on May 14, 2019, 12:26 p.m.