Changes between Version 3 and Version 4 of SummaryRuby

Timestamp:

Nov 15, 2014, 12:54:33 PM (10 years ago)

Author:

Thanatermesis

Comment:

--

SummaryRuby

@@ -116 +116 @@
 
 # Inheritance:
-# create a superclass called Doctro from the Person's class (inheritance)
+# create a superclass called Doctor from the Person's class (inheritance)
 class Doctor < Person
     # we have already defined the method "name" in the Person's class, so we extend it:
@@ -279 +279 @@
         color = "green"
     else
-        color "unknown"
+        color = "unknown"
 end
 
@@ -314 +314 @@
 #
 a = [1, 2, 3, "four"]
-a << 5
-a.push 6
+a << 5      # append an item
+a.push 6    # append an item
 puts a.empty? # false
 puts a.include?("four") # true
@@ -346 +346 @@
 # the delimiter of "each" can be modified passing an argument like .each(',') or
 # changing the input delimiter variable $/
+#
+# More exactly, yield runs "in the inverse way" including its parameters, what you pass to a call to the function that includes a yield, this is a more clear example:
+def test
+   yield 5
+   puts "method test"
+   yield 100
+end
+test {|i| puts "You are in the block #{i}"}
+
+# so you got:
+# You are in the block 5
+# method test
+# You are in the block 100
+
 
 
@@ -357 +371 @@
         a = (10 / 0)  # if this doesn't works...
     rescue => e
-        a = 10  # let's still use the original value in failed cases, instead of exit/error
-        puts "class of exception is: " + e.class.to_s
+        a = 10  # instead of just exiting we can simply assign a default behaviour and continue
+        puts "class of exception is: " + e.class.to_s  # show some debug reason of our error
     end
 end
@@ -595 +609 @@
 File.open("text.txt", "w") do |entry| entry.puts "Hi" end
 # note that the next line is invalid, if you put a space before ( then is not an argument list what you pass to it
-#File.open ("text.txt", "w")  do |entry| entry.puts "Hi" end
+#File.open      ("text.txt", "w") do |entry| entry.puts "Hi" end
 
 # appending