internetExists

urlExists

A lightweight function that may be less reliable than more purpose built solutions
such as checking a specific web page using <code>RCurl::url.exists</code>. However, this is
slightly faster and is sufficient for many uses.

A collection of high-level, machine- and OS-independent tools
for making reproducible and reusable content in R.
The two workhorse functions are Cache() and prepInputs(). Cache()
allows for nested caching, is robust to environments and objects with
environments (like functions), and deals with some classes of
file-backed R objects e.g., from terra and raster packages.
Both functions have been developed to
be foundational components of data retrieval
and processing in continuous workflow situations. In both functions,
efforts are made to make the first and subsequent calls of functions have
the same result, but faster at subsequent times by way of checksums
and digesting. Several features are still under development, including
cloud storage of cached objects allowing for sharing between users. Several
advanced options are available, see ?reproducibleOptions().

Eliot J B

reproducible

Enhance Reproducibility of R Code

Eliot J B McIntire

Alex M Chubaty

Tati Micheletti

Ceres Barros

Ian Eddy

His Majesty the King in Right of Canada, as represented by the Minister of Natural Resources Canada 

internetExists function

<dl><dt>url</dt>
<dd>A url of the form <code>https://...</code> to test for existence.</dd></dl>

Arguments

Checks for existed of a url or the internet using https://CRAN.R-project.org — internetExists

<dl>

<dt>url</dt>
<dd>A url of the form <code>https://...</code> to test for existence.</dd>

</dl>

Checks for existed of a url or the internet using <a href='https://CRAN.R-project.org'>https://CRAN.R-project.org</a>

Checks for existed of a url or the internet using <a href="https://CRAN.R-project.org">https://CRAN.R-project.org</a>

internetExists: Checks for existed of a url or the internet using https://CRAN.R-project.org

Description

Usage

Value

Arguments