Cacher is the code snippet organizer for pro developers

# Ruby Basics

#Strings

#Get input from a user and assign it to a variable:

name = gets

#Put the contents of a name in another string via interpolation:

puts "Hello #{name}!"


#Assuming the variable "name" contained "Treehouse", that would print "Hello Treehouse!".

#Print out the characters without string interpolation:

puts 'Hello #{name}!'

#That would print out the text "Hello #{name}!" regardless of what is contained in the name variable.

#Methods of creating interpolated strings:

#Double quotes:

string = "Hello"

#With %Q: do interpolation - it prints the name

string = %Q(Hello World!)


#Multiple lines:

string = "
My long string
On multiple lines
Containes newline characters."


#Heredoc:

string = <<-EOF
Anything placed between 
The characters at the top of the string
Wil go inside it.

It is ended with the same characters.
EOF

name = "Jason"
string = <--HELLO
My long #{name}
On multiple lines
Containes newline characters.
HELLO

#it print the name


puts string

#Methods of crating strings without interpolation:

#Single quotes:

string = 'Hello World!'

#%q:

string = %q(Hello world!)




--------------


#Special characters:

#\n newline \t tab \s space

#Use a newline in a String:

puts "Hello\nWorld"


#Prints:

Hello
World

#Use a tab in a String:

puts "Hello\tWorld"

#Prints:

Hello     World


--------------


#String Methods

#Create a string variable with your name:
name = "Jason"


#Uppercase a string:
name.upcase


#Turn a string in to lowercase:
name.downcase


#Reverse a string:
name.reverse


#All together
name.reverse.upcase.downcase.reverse


#assign to a variable

uppercase_name = name.upcase

uppercase_name
# print name in uppercase


--------------


#String Documentation

#Concepts

#Methods that are named with an exclamation point at the end generally will change the variable value rather than return a new variable.

#Reading the documentation allows you to look up new methods you may not have seen before and reveals how methods work as well as what they return.

--

upcase -> new_str

#new_str  : Return a new string but it doesn't change it completelyyyyy

---

upcase! -> str or nil (upcase with an exclamation)

#the variable was change - it change the variable

a_string = "This is a String"
another_string = 'This is also a String'


# Multi-line string  """

beginning = """
Mon
Tue
Wed
Thur
Friday
Saturday
Sunday
"""


# ---------------


#String interpolation

#Another advantage to using double quoted strings is 
#that it allows us to interpolate values inside strings:

name = "Nizar"
puts "Hi #{name}"   (Put value inside inside like a template)



minute = 60
hour = 60 * minute
day = 24 * hour

puts "Seconds in a #{day}"
puts day

# Working with strings

first_name = priss
last_name = rodriguez

first_name + " " + lastname

# concatinate and added to the first_name variable
first_name << " " << lastname


# http://ascii-code.com

#ASCII table Code

first_name[0]
112  #p minuscula

name = gets
# type name

prissrodriguez

# ------

string = "hello world\n"
"hello world\n"


# inspect method show variable 
puts string.inspect 
"hello world\n"


# chomp method no white spaces at end
puts string.chomp  
hello world


# chomp method no white spaces 
string.chop  
"hello world"


# include method ask if the world is on the string
string.include?("world")  
true


string.include?("priss")  
false


# replace method one string with another
string.replace("priss") 


# index method what position in the string de letter ocurr
string.index("i") 
2 


# reverse method reverse all letter in string
string.reverse 
ssirp


# upcase method
string.upcase 
PRISS


# downcase method
string.downcase 
priss


# swapcase method change upcase to down and down to upper
string.swapcase 
pRISS


# length method length of string including spaces
string.length 
5


# size method the same as length
string.size 
5


# split method return the string in an array
string.split(" ") 
["Hello", "world"]

string.concat("Another string")
"Hello world Another string"


# Bang methods end with an exclamation point ! and are considered DANGEROUS
# Modify the receiver in place
string.reverse!
ssirp