Ruby talk
Download as PPTX, PDF0 likes152 views
This document is a beginner's guide to learning Ruby that includes a table of contents and examples of Ruby code snippets covering topics like loops, arrays, methods, conditionals, and ranges. It introduces Ruby concepts and provides short code examples to demonstrate different language features like iterating over arrays, reducing arrays, defining and calling methods, checking for inclusion in arrays, and converting between data types. The document aims to help beginners learn Ruby basics through explanatory code samples.
![int [] a = {12,45,56,35};
for (int n : a) {
System.out.println(n);
}
[12,45,56,35].each { |n| puts n }
puts [12,45,56,35].join("n")
[12,45,56,35].each do |n|
puts n
end](https://image.slidesharecdn.com/rubytalk-190919051931/85/Ruby-talk-5-320.jpg)
![numbers = [2, 2, 2, 2,
2]
sum = 0
for value in numbers
sum += value
end
puts sum
numbers = [2, 2, 2, 2,
2]
puts numbers.reduce(:+)](https://image.slidesharecdn.com/rubytalk-190919051931/85/Ruby-talk-6-320.jpg)
![['a','e','i','o','u'].include? 'a'
true
name = "ZAMAN"
name.downcase
puts "#{name}"
ZAMAN
name.downcase!
puts "#{name}"
zaman](https://image.slidesharecdn.com/rubytalk-190919051931/85/Ruby-talk-8-320.jpg)
![numbers = [*1..10]
[1, 2, 3, 4, 5, 6,
7, 8, 9, 10]
range = 1...10
range.to_a
[1, 2, 3, 4, 5, 6,
7, 8, 9]
range = 1..10
range.cover?(5)
true
range = 1..10
range.to_a
[1, 2, 3, 4, 5, 6,
7, 8, 9, 10]](https://image.slidesharecdn.com/rubytalk-190919051931/85/Ruby-talk-9-320.jpg)
![def method_name(floors, *values)
# evaluate business logics
floors.reduce(:+)
end
method_name([5, 2, 6, 87], "alarm alarm", "false alarm")
method_name([1, 1, 1, 1, 1, 1, 1, 1, 1], "not a drill")](https://image.slidesharecdn.com/rubytalk-190919051931/85/Ruby-talk-10-320.jpg)
Ruby talk
- 1. Ruby-Cheatsheet A beginner's guide to learning Ruby github.com/lifeparticle/Ruby-Cheatsheet
- 5. int [] a = {12,45,56,35}; for (int n : a) { System.out.println(n); } [12,45,56,35].each { |n| puts n } puts [12,45,56,35].join("n") [12,45,56,35].each do |n| puts n end
- 6. numbers = [2, 2, 2, 2, 2] sum = 0 for value in numbers sum += value end puts sum numbers = [2, 2, 2, 2, 2] puts numbers.reduce(:+)
- 7. def sum (a, b) 10 end sum 5, 5 def sum (a, b) a + b end sum 5, 6 def sum (a, b) return a + b end sum 5, 6
- 8. ['a','e','i','o','u'].include? 'a' true name = "ZAMAN" name.downcase puts "#{name}" ZAMAN name.downcase! puts "#{name}" zaman
- 9. numbers = [*1..10] [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] range = 1...10 range.to_a [1, 2, 3, 4, 5, 6, 7, 8, 9] range = 1..10 range.cover?(5) true range = 1..10 range.to_a [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
- 10. def method_name(floors, *values) # evaluate business logics floors.reduce(:+) end method_name([5, 2, 6, 87], "alarm alarm", "false alarm") method_name([1, 1, 1, 1, 1, 1, 1, 1, 1], "not a drill")
- 11. temp = 19 if temp >= 25 puts "hot" elsif temp < 25 && temp >= 18 puts "normal" else puts "cold" end name = "rob" unless name == "bob" puts "hello stranger" else puts "hello bob" end count = 1 puts "hello world" if count == 1
- 12. Does anyone have any questions? mahbub.ninja THANKS