"The first one has a similar shape to the eventual output array. The second one has an arbitrary structure and uses three different utilities. Furthermore, the second version also constructs two redundant intermediate sequences, and for longer sequences, this extra copying will outweigh any overhead " { $link make } " has due to its use of a dynamic variable to store the sequence being built."
$nl
"On the other hand, using " { $link make } " instead of a single call to " { $link surround } " is overkill. The below headings summarize the most important cases where other idioms are more appropriate than " { $link make } "."
"Sometimes, usages of " { $link make } " are better expressed with " { $link "sequences-combinators" } ". For example, instead of calling a combinator with a quotation which executes " { $link , } " exactly once on each iteration, often a combinator encapsulating that specific idiom exists and can be used."
"Sometimes, an existing word already implements a specific " { $link make } " usage. For example, " { $link prefix } " is equivalent to the following, with the added caveat that the below example always outputs an array:"
"The " { $vocab-link "make" } " vocabulary implements a facility for constructing " { $link sequence } "s and " { $link assoc } "s by holding a collector object in a variable. Storing the collector object in a variable rather than the stack may allow code to be written with less stack manipulation."
{ $description "Calls the quotation in a new dynamic scope with the " { $link building } " variable bound to a new resizable mutable sequence. The quotation and any words it calls can execute the " { $link , } " and " { $link % } " words to accumulate elements into a sequence (or " { $link ,, } " and " { $link %% } " into an assoc). When the quotation returns, all accumulated elements are collected into an object with the same type as " { $snippet "exemplar" } "." }
