06-01-2022

408 words 3 minutes

Ruby Workshop

p vs prints vs puts

link to puts vs prints

  • p sends the following characters directly to the terminal

  • print sends the string to the terminal without

  • puts prints the string to the terminal

  • p is more explicit, Nice thinking Katerina!!!!! =D that's the sort of learning i'm here for

  • HOWEVER, never send p to a user!!!!

control flow

  • if ( this condition is true )

    • execute this section of code

  • if the condition is true

##RUBY FLOW CONTROL

number = gets.chomp.to_i

Captain S, Sailor of the FizzBuzz Seas!

-= or -

remember that -=, += will reassign the value x - 1 will not reassign x

Ruby, Chapter 1

The programme is all that is the case (no, really!)

  • IRB

  • exit or quit to leave

  • IRB will not remember the programme, exiting will destroy the programme and assigned variables (assumedly using Ruby's garbage collector - it must run at exit?)

  • instead of using a REPL, you can store this software in a file

  • by using the Ruby keyword require, we can import the file into the programme where the REPL will immediately execute it

  • being in a REPL is like becoming the language

  • I AM RUBYYYY (ngl prefer t but w/e)

  • the world itself is an object - usually called main

  • remember, the main word for this is a 'prompt'

#Puts, Print, P, pp

  • Puts (put string) includes the newline character \n at the end of the input
  • Print does not include the newline character
  • puts and print treat arrays differently. puts will also try .to_s on all array objects, hence it will include nil objects in the output
puts [1,2]
1
2

print [1,2]
[1,2]

puts [1, nil, nil, 4]
1


4

pp will pretty print! Ruby pre 2.4 must require 'pp' to access this method

RVM Problems

  • RVM is having a fit because I installed homebrew(linuxbrew) after installing RVM - as such it isnt first in the path

in brief

fixed git issue

git config associates to email address directly to github account - beware!

gcm requires the 'store' helper setting

rvm sometimes require the command '/bin/bash --login' to be run before changing ruby versions

helped Hoom'n :) it felt a good thing to do - it helped another person

tried to learn a little sign. must try harder. maybe convince some others also?

received a MacBook, which I need to set up

tech evangelised another musician - need to curate him a learning list, including the touch typing thing

sent an email to makers

#First Thing Tomorrow

Makers hub - request quiz :)