In the previous chapter, we used the function _.find(list, predicate, [context]) to search for a specific item within a collection. This function is part of the Underscore comprehensive functionality for searching and filtering collections represented by object properties and array-like objects. We will make a distinction between search and filter functions with the former tasked with finding one item in a collection and the latter tasked with retrieving a subset of the collection (although sometimes, you will find the distinction between these functions thin and blurry).

We will revisit the find function and the other search-related and filtering-related functions using an example with slightly more diverse data that is suitable for database persistence. We will use the problem domain of a bicycle rental shop and build an array of bicycle objects with the following structure:

var getBicycles = function() {
  return [{
    id: 1,
    name: "A fast bike",
    type: ...