Completed Progate Ruby Learning Course II

What i learned

It's a memorandum for myself, so just the main points ...

--Don't forget [] when arranging --The index number of the array starts from 0. (0,1,2 ...) --How to use hash --One of the ways to write a hash "Symbol" --How to write without hash --There are three ways to write a hash, but "abbreviation" is common. --"Nil" = meaning nothing --Use "each statement" for iterative processing in Ruby --Variable names in each statement are often (customarily) in the singular form of array variable names.

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Ruby Learning # 25 Comments

Ruby Learning # 13 Arrays

Ruby Learning # 34 Modules

Ruby Learning # 14 Hashes

Ruby Learning # 33 Inheritance

Ruby Learning # 15 Methods

Ruby Learning # 30 Initialize Method

Ruby Learning # 29 Classes & Objects

Ruby Learning # 20 Case Expressions

Ruby Learning # 24 Exponent Method

Ruby Learning # 17 If Statements

Ruby Learning # 21 While Loops

Ruby Learning # 31 Object Methods

Ruby Learning # 27 Writing Files

Ruby Learning # 35 Interactive Ruby (irb)

Ruby Learning # 9 Math & Numbers

Ruby Learning # 28 Handling Errors

Ruby Learning # 26 Reading Files

Ruby Learning # 23 For Loops

Ruby Learning # 16 Return Statement

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