From 081deac4b189f9fc4beced619653a2d602fd3b7a Mon Sep 17 00:00:00 2001 From: Geoff Liu Date: Wed, 4 Mar 2015 16:56:23 -0700 Subject: Add logical operators to Ruby tutorial --- ruby.html.markdown | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'ruby.html.markdown') diff --git a/ruby.html.markdown b/ruby.html.markdown index 7cf5bdc7..1883d1ad 100644 --- a/ruby.html.markdown +++ b/ruby.html.markdown @@ -60,8 +60,6 @@ false.class #=> FalseClass # Inequality 1 != 1 #=> false 2 != 1 #=> true -!true #=> false -!false #=> true # apart from false itself, nil is the only other 'falsey' value @@ -75,6 +73,17 @@ false.class #=> FalseClass 2 <= 2 #=> true 2 >= 2 #=> true +# Logical operators +true && false #=> false +true || false #=> true +!true #=> false + +# Alternate spellings of logical operators +true and false #=> false +true or false #=> true +not true #=> false + + # Strings are objects 'I am a string'.class #=> String @@ -280,9 +289,9 @@ rescue NoMemoryError => exception_variable puts 'NoMemoryError was raised', exception_variable rescue RuntimeError => other_exception_variable puts 'RuntimeError was raised now' -else +else puts 'This runs if no exceptions were thrown at all' -ensure +ensure puts 'This code always runs no matter what' end -- cgit v1.2.3