> On 2015-Sep-11, at 11:00 , Nick Savage <nick.sav...@gmail.com> wrote: > > Okay I started with Learn the hard way with ruby. > My code is below and below each code is my question. > I guess I do not understand the identifiers because when I do them in my head > they dont add up. > > Any help would be appreciative and the way I learn I can not move on till I > know.
This is just barely a Ruby issue. Most operator precedence is the same as you'd expect just from math: http://ruby-doc.org/core-2.2.3/doc/syntax/precedence_rdoc.html <http://ruby-doc.org/core-2.2.3/doc/syntax/precedence_rdoc.html> > > puts "I will now count my chickens:'" > puts "Hens #{25 + 30 / 6}" > #how does that equal 30? 25 + (30/6) 25 + 5 30 > puts "Roosters #{100 - 25 * 3 % 4}" > #How does this equal 97 100 - (25 * 3 % 4) 100 - ((25 * 3) % 4) # same precedence, do them left-to-right 100 - ( 75 % 4) 100 - ( 3 ) # 75 % 4 is the remainder after 75/4 100 - 3 97 > > puts "Now I will count the eggs:" > > puts 3 + 2 + 1 - 5 + 4 % 2 - 1 / 4 + 6 > #How does this equal 7, is it because it is 6.5 and it rounds up. Here you have to add a fact (behavior) common to many programming languages: "integer division truncates to an integer" 3 + 2 + 1 - 5 + (4%2) - (1/4) + 6 3 + 2 + 1 - 5 + ( 0 ) - ( 0 ) + 6 # then do the + and - left-to-right 5 + 1 - 5 + ( 0 ) - ( 0 ) + 6 6 - 5 + ( 0 ) - ( 0 ) + 6 1 + ( 0 ) - ( 0 ) + 6 1 - ( 0 ) + 6 1 + 6 7 Very simple. Perhaps you're over-thinking it? -Rob -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-talk@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/98289E25-4163-4815-8F86-855810FA6725%40agileconsultingllc.com. For more options, visit https://groups.google.com/d/optout.
