If you’re looking for a programming language that values productivity over optimization, then Ruby is definitely for you.
- Ruby syntax is intuitive and has striking resemblance to the English language.
- So, if you are like me and did poorly in English class as a child, this is a win-win to brush up on grammar rules and Ruby.
- Otherwise, have a fun time learning Ruby and mastering it in no time.
brew install ruby
Warning: You’re not done!
brew won’t add
/usr/local/bin. Instead, it adds it to
/usr/local/opt/ruby/bin/ruby. Currently, calls made to
gem will default to the system’s version of ruby, instead of the one installed with
brew. To fix this, add
/usr/local/opt/ruby/bin to the beginning of your
aka I/O - it’s not rocket science, just computer science
Basic input is read in from the command line
var_name = gets.chomp #command line input
There are two types of print statements in ruby:
- print - no newline
- puts - adds a newline after output
var_string = "Welcome to the wiki" print var_string #1. no newline puts var_string #2. w/ newline
Ruby includes given methods for various string manipulation techniques. Calling any of the following methods with the last character as ‘!’ modifies the string in place vs. creating a copy.
- Create uppercase string - .upcase
to_upper = "John".upcase to_upper.upcase!
- Create lowercase string - .downcase
to_lower = "Cameron".downcase to_lower.downcase!
- Create reverse string - .reverse
rev = "Austin".reverse rev.reverse!
- Create string with first char capitalized- .capitalize
first_capped = "Chase".upcase first_capped.upcase!
else blocks check if statements evaluate as true.
a = "Yes" b = "No" if a == "Yes" print "a wins" elsif b == "No" print "b wins" else print "NGL ... so confused RN Bruh" end
else blocks check if statements evaluate as false.
a = false unless a print "a loses" else print "a wins" end
Ruby also supports ternary conditional expressions and case statements. The following three code blocks are identical in practice.
In my opinion, ternary conditional expressions tend to have a cleaner syntax.
#global variable for consistency --> Not Good in Practice a = true #Classic Conditional Expression if a == true print "a wins" else print "a loses" end #Ternary Conditional Expression print a == true ? "a wins" : "a loses" #Case Conditional Statement case a when a == true puts "a wins" else puts "a loses" end
Coming Soon Friends…
Check if any gems need to be updated
gem outdated gem update <gem_name>
By default, ruby will keep old versions of gems, so after updating, it’s good to run the
Find where a gem is installed
gem which <gem_name>
Uninstall a single gem
gem uninstall <gem_name>
Uninstall all gems with no confirmation
gem uninstall -aIx
Nowadays bundler is built into Ruby 2.6, so keep on using it.
Previewing the website
It’s a good idea to make sure the website looks correct before pushing your repository to GitHub. You can do that by running the following command inside the root directory of your project
bundle exec jekyll serve
You can close the server by issuing the following command in any directory