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CSE 3901 MIDTERM 1 FULL REVISION NOTES WITH GIT, VERSION CONTROL, AND DEVELOPMENT WORKFLOW CONCEPTS

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CSE 3901 MIDTERM 1 FULL REVISION NOTES WITH GIT, VERSION CONTROL, AND DEVELOPMENT WORKFLOW CONCEPTS

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CSE 3901 MIDTERM 1 FULL REVISION NOTES
WITH GIT, VERSION CONTROL, AND
DEVELOPMENT WORKFLOW CONCEPTS

◉ Interpreted Program.
Answer: Run a program directly, without compiling


pro:
platform independence
read-eval-print loop (REPL)
reflection


con:
speed
later error detection


◉ Dynamically typed.
Answer: objects have types, variables don't


◉ Objects in Ruby?.
Answer: Everything

,◉ Fixnum Numbers in Ruby.
Answer: 83, 0123, 0x53, 0b1010011, 0b101_0011


◉ Float Numbers in Ruby.
Answer: 123.45, 1.2345e2, 12345E-2


◉ Rational Numbers in Ruby.
Answer: 2/3r


◉ Complex Numbers in Ruby.
Answer: 4+3i


◉ Strings Delimeters.
Answer: " " and ' '


◉ String Interpolations inside " ".
Answer: #{ ... } --> allows executions inside string


◉ Range inclusive.
Answer: 0..4

,◉ Range end exclusive.
Answer: 0...4


◉ Single Line comment.
Answer: # start with hashtag/pound/octothorpe


◉ Multi-line comment.
Answer: =being
words
words word
=end


# MUST appear at beginning of line


◉ Arithmetic Operators.
Answer: + - ** / % ***


◉ Integer / (div) rounds towards.
Answer: negative infinity


◉ .0.
Answer: 0.33333333333333333333333

, ◉ .
Answer: 0


◉ -.
Answer: -1


◉ -1 % 3.
Answer: 2


◉ 25 % 3.
Answer: 1


◉ Bitwise Operators.
Answer: ~ | & ^ << >>


◉ 5 | 2.
Answer: 7


◉ 13 ^ 6.
Answer: 11

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