From: C Erler <erlercw@...>
Date: 2007-07-11T17:33:17+09:00
Subject: Re: Choice of the word "inject" vs what the method actually does (method naming)



On Jul 4, 7:32 am, "Wayne E. Seguin" <wayneeseg...@gmail.com> wrote:
> Yes I realize that an alias may be used for this, however, I am  
> looking for insight as to the reason "inject" was chosen over  
> something better suited like accumulate.

The general idea is that you have an unfinished result.  You inject
each item one at a time into the result.

[1, 2, 3].inject(0) { |sum, item| sum + item } injects each item into
the sum one at a time.
[String, Array, Hash].inject({}) { |class_lookup, klass|
class_lookup[klass.name] = klass } injects an entry into the lookup
table one at a time.
[egg, sugar, salt].inject { |mixture, ingredient| mixture.mix_in
ingredient } injects an ingredient into the mixture one at a time.