the data, or an <a rd-options="" href="/link/oscope?package=lenses&version=0.0.3" data-mini-rdoc="lenses::oscope">oscope</a>

the lens, or in the case of an <code>oscope</code>, the replacement

the replacement value, or nothing in the case of an <code>oscope</code>

Set the subcomponent of the data referred to by a lens
with a new value. See <a rd-options="" href="/link/lens?package=lenses&version=0.0.3" data-mini-rdoc="lenses::lens">lens</a> for details. Merely dispatches
to the <code>set</code> component of the lens.

Provides tools for creating and using lenses to simplify data manipulation. Lenses are composable getter/setter pairs for working with data in a purely functional way. Inspired by the 'Haskell' library 'lens' (Kmett, 2012) <https://hackage.haskell.org/package/lens>. For a fairly comprehensive (and highly technical) history of lenses please see the 'lens' wiki <https://github.com/ekmett/lens/wiki/History-of-Lenses>.

Chris Hammill

lenses

Elegant Data Manipulation with Lenses

Ben Darwin

set function

the data, or an <a rd-options='' href='oscope'>oscope</a>

Set the subcomponent of the data referred to by a lens
with a new value. See <a rd-options='' href='lens'>lens</a> for details. Merely dispatches
to the <code>set</code> component of the lens.

set: Modify data with a lens

Description

Usage

Arguments