Ruby Programming

Thank you

You missed the shovel << operator for adding to arrays smh

Bro how come every video is like learn ruby coding but no videos are like here's what I did with ruby coding, might have to do something about that

Tyhansen

Are you still smoking Ecigs Derek? 😀Nice bookmark on your browser 😀

thank you for course

Great video.

Any new updated video coming of Ruby ?

Amazing tutorial my guy <3

amazing work ! thanks so much !

Excellent. Really glad to find a source that did not cover all the basics of programming and just got to the point.

scarlet ruby farmming

After this one video, I'll probably be mostly good. I'll go straight to the Go video next

You should do a Rust video sometime! As a advanced Rust dev, we need more material out there

Thank you. I will look for you on Udemy.

Best

Good explanation...thank you.

Which IDE are you using?

i know ruby

Thank you so much for the tutorial, as a python learner as well I see a ton of similarities to Python. So I think it can glom onto this language

The syntax parser seems to be doing left-first traversal. Meaning, in Python we do "If (condition): continue", while here its "next unless". Maybe I am wrong, but most commands do something similar it seems

Speedrunning Ruby, WORLD RECORD

Is Derek Banas god ?

I just have ONE question. Why *STAY HOME*??

55 minutes later... Ruby syntax is ugly.

Incredibly efficient, well put-together video. Helped me review for my final without wasting time. Thanks!

ok, now this:
"""
s = "cat cat cat"
puts s.count("cat") # = 9
"""
is annoying.
apparently one has to use:
"""
s = "cat cat cat"
puts s.scan(/cat/).length # = 3
"""
to achieve what one would expect.

if someone is interested how a not-completely-trivial recursion works in ruby, here's what i have managed to discover:
"""
def max(*args)
case args.length
when 0 then return nil
when 1 then return args[0]
else
def _max(*args)
x, y, *tail = args
m = (x > y) ? x : y
return (tail.empty?) ? m : _max(m, *tail)
end
return _max(*args)
end
end

def min(*args)
case args.length
when 0 then return nil
when 1 then return args[0]
else
def _min(*args)
x, y, *tail = args
m = (x < y) ? x : y
return (tail.empty?) ? m : _min(m, *tail)
end
return _min(*args)
end
end

def sum(*args)
case args.length
when 0 then return nil
when 1 then return args[0]
else
def _sum(*args)
x, y, *tail = args
s = x + y
return (tail.empty?) ? s : _sum(s, *tail)
end
return _sum(*args)
end
end

def avg(*args)
case args.length
when 0 then return nil
when 1 then return args[0]
else
n = 2
def _avg(*args, n)
x, y, *tail = args
a = ((n-1)*x + y).fdiv(n)
return (tail.empty?) ? a : _avg(a, *tail, n+1)
end
return _avg(*args, n)
end
end

arr0 = []
arr1 = [4]
arr2 = [2, -3]
arr3 = [3, 5, 0, -4]

arrs = [arr0, arr1, arr2, arr3]

for arr in arrs do
nums = arr.to_s[1..-2]
puts "max(#{nums}) = #{max(*arr)}"
puts "min(#{nums}) = #{min(*arr)}"
puts "sum(#{nums}) = #{sum(*arr)}"
puts "avg(#{nums}) = #{avg(*arr)}"
end
"""

regarding looping on arrays, i have seen another that seems to be popular and quite funny:
"""
nums = [1, 2, 3, 4]
N = nums.length

N.times do |idx|
puts nums[idx]
end
"""

i have found a more ruby way to display these even numbers:
"""
num = 1

while num <= 10 do
puts num if num.even?
num += 1
end
"""
or
"""
num = 1

while num <= 10 do
puts num unless num.odd?
num += 1
end
"""

regarding ruby's case example, i think this would have been better:

"""
print "Enter greeting: "

greeting = gets.chomp.capitalize

case greeting
when "French" then
puts "Bonjour!"
when "Spanish" then
puts "Hola!"
else
puts "(peace sign)"
end
"""

i.e. one can capitalize and there is no need for these "exit"s as it doesn't seem to cascade anyways.
also, i like to put optional "then" as it reads almost like a sentence. ruby is amazing. :)

one thing I like to check in a new language is what it returns when I enter something like "-1 % 4", and i am so pleased to see that ruby returns 3 here and not -1. so pleased. 💗💗💗

Great. A quick, complete and professional teaching.

"elsif" why no e??

Awesome

Alternative title: Derek having a midlife crisis.

This is the way i teach people.
Thank you, Derek.
Now i can use this object-oriented language (it has classes i see).

Saving this for later

Loved it! Thanks man!!

Just wondering, but what's the point of ennumerabels? like, it seems like an Array with extra steps, great content, thank you so much

How about a refresher? what changed in new latest version

Thank you so much for this video. I will take it piece by piece.

def ask_integer(message)
print message+' '
gets.to_i
end

i1=ask_integer('first integer?')
i2=ask_integer('second integer?')
puts "#{i1}+#{i2}=#{i1+i2}"