I want new Enumerable Methods, "includes, anies"

Rails
1

#includes
##before:
enum.each do |e|
if e == “1”
#bla~
#bla~
end
end

##after:
enum.includes(“1”). do
#bla~
#bla~
end

#anies
##before:
enum.each do |e|
if e.id == “1”
#bla~
#bla~
end
end

##after:
enum.anies(id == “1”). do
#bla~
#bla~
end

my eng is very poor.
so i’m afraid wrong-understand

2

hiphapis wrote:

#includes
##before:
enum.each do |e|
if e == “1”
#bla~
#bla~
end
end

##after:
enum.includes(“1”). do
#bla~
#bla~
end

Array#include? already exists with this exact functionality. I forget
if other Enumerables also have include?.

#anies
##before:
enum.each do |e|
if e.id == “1”
#bla~
#bla~
end
end

##after:
enum.anies(id == “1”). do
#bla~
#bla~
end

Use Enumerable#select.

my eng is very poor.
so i’m afraid wrong-understand

Spend some more time with the Ruby core/stdlib docs.

Best,

Marnen Laibow-Koser
http://www.marnen.org
[email protected]

3

On Aug 5, 10:25 pm, hiphapis [email protected] wrote:

enum.includes(“1”). do
#bla~
#bla~
end

You can also do this with:

enum.select { |e| e == “1” }.each do …

so your ‘includes’ function could be written as:

class Enumerable
def includes(o, &block)
select { |e| e == o }.each(&block)
end
end

enum.anies(id == “1”). do
#bla~
#bla~
end

I don’t think this will even parse - passing bare code fragments like
that doesn’t work in Ruby.

–Matt J.