These functions were inspired by underscore.js.
pluck(key)pluck_apply(key, xss)
pick(keys)
pick_apply(keys, xss)
the name of a value in a list
a list of lists
a character vector of names in a list
pluck returns an unnamed value and pluck_apply returns
a list of unnamed values. pick returns a simplified version of the
original list. pick_apply returns a list of simplified lists.
pluck: Pluck a named value from a list
pick: Simplify a list by picking out whitelisted names
The simple versions of pluck and pick are curried functions,
meaning that they return a function which can be applied to a list. See the
syntax in the usage section.