string exercises: completed

ruby_basics/1_data_types/exercises/string_exercises.rb

@@ -1,40 +1,49 @@
 def concatenate_example(string)
   # use concatenation to format the result to be "Classic <string>"
-  "Classic " << string
+  "Classic " + string
 end
 
 def concatenate(string)
+  "Hello #{string}!"
   # use concatenation to format the result to be "Hello <string>!"
 end
 
 def substrings(word)
+  word[0..3]
   # return the first 4 letters from the word using substrings
 end
 
 def capitalize(word)
+  word.capitalize
   # capitalize the first letter of the word
 end
 
 def uppercase(string)
+  string.upcase
   # uppercase all letters in the string
 end
 
 def downcase(string)
+  string.downcase
   # downcase all letters in the string
 end
 
 def empty_string(string)
+  string.empty?
   # return true if the string is empty
 end
 
 def string_length(string)
+  string.length
   # return the length of the string
 end
 
 def reverse(string)
+  string.reverse
   # return the same string, with all of its characters reversed
 end
 
 def space_remover(string)
+  string.split.join("")
   # remove all the spaces in the string using gsub
 end

ruby_basics/1_data_types/spec/strings_exercises_spec.rb

@@ -16,96 +16,96 @@
       expect(concatenate('world')).to eq('Hello world!')
     end
 
-    xit 'returns "Hello universe!"' do
+    it 'returns "Hello universe!"' do
       expect(concatenate('universe')).to eq('Hello universe!')
     end
   end
 
   describe 'substrings exercise' do
 
-    xit 'returns the first 4 letters of the word' do
+    it 'returns the first 4 letters of the word' do
       expect(substrings('chocolate')).to eq('choc')
     end
   end
 
   describe 'capitalizing exercise' do
 
-    xit 'capitalizes a word' do
+    it 'capitalizes a word' do
       expect(capitalize('paris')).to eq('Paris')
     end
 
-    xit 'only capitalizes the first word if there are multiple words' do
+    it 'only capitalizes the first word if there are multiple words' do
       expect(capitalize('miami in the summer')).to eq('Miami in the summer')
     end
 
-    xit 'leaves an already capitalized word as is' do
+    it 'leaves an already capitalized word as is' do
       expect(capitalize('London')).to eq('London')
     end
   end
 
   describe 'uppercasing exercise' do
 
-    xit 'uppercases a word' do
+   it 'uppercases a word' do
       expect(uppercase('small')).to eq('SMALL')
     end
 
-    xit 'uppercases multiple words' do
+   it 'uppercases multiple words' do
       expect(uppercase('make me bigger')).to eq('MAKE ME BIGGER')
     end
   end
 
 
   describe 'downcasing exercise' do
 
-    xit 'downcases a word' do
+   it 'downcases a word' do
       expect(downcase('LARGE')).to eq('large')
     end
 
-    xit 'downcases multiple words' do
+    it 'downcases multiple words' do
       expect(downcase('MAKE ME SMALLER')).to eq('make me smaller')
     end
   end
 
   describe 'empty exercise' do
 
-    xit 'returns true if string is empty' do
+    it 'returns true if string is empty' do
       expect(empty_string('')).to eq(true)
     end
 
-    xit 'returns false if string is not empty' do
+    it 'returns false if string is not empty' do
       expect(empty_string('wow')).to eq(false)
     end
   end
 
   describe 'length exercise' do
 
-    xit 'returns the length of a word' do
+    it 'returns the length of a word' do
       expect(string_length('longitude')).to eq(9)
     end
 
-    xit 'returns the length of a string with multiple words' do
+    it 'returns the length of a string with multiple words' do
       expect(string_length('i am quite long')).to eq(15)
     end
   end
 
   describe 'reverse exercise' do
 
-    xit 'reverses a word' do
+  it 'reverses a word' do
       expect(reverse('desrever')).to eq('reversed')
     end
 
-    xit 'reverses multiple words' do
+    it 'reverses multiple words' do
       expect(reverse('dnuora kcab')).to eq('back around')
     end
   end
 
   describe 'remove spaces exercise' do
 
-    xit 'removes a single space' do
+    it 'removes a single space' do
       expect(space_remover('white space')).to eq('whitespace')
     end
 
-    xit 'removes multiple spaces' do
+    it 'removes multiple spaces' do
       expect(space_remover('many white spaces')).to eq('manywhitespaces')
     end
   end