require
even if the package is already installed.packages
now brings the package into memory using require
, which was the pre-0.3 functionality.packages
will now install from GitHub when the package name contains a '/'.packages
will now take verbose = TRUE
to announce the installations.packages
and load_package
.packages
(instead, must pass multiple arguments).define
function takes an envir
argument that can be used
to specify what parent environment to use when sourcing dependencies
(under the hood, this is done with base::source
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