[Ruby] Method memorandum


Write down the method as a memorandum

gets method

Gets the value entered by the user on the keyboard as a string There is always a line break at the end

Standard input

input = gets
p input

Output result

chomp method

Remove the trailing newline character and return a new string

Standard input

input = gets.chomp
p input

Output result

split method

Split a string into a array of strings

Standard input
hello new world

array = gets.split(" ")
p array

Output result
["hello", "new", "world"]

readlines method

Gets the multi-line value entered by the user on the keyboard as an array of strings`

Standard input

array = readlines.chomp
p array

Output result
["hello", "new", "world"]

map method

Iterate as many times as there are elements in the array

array = ["1", "2", "3"]
new_array = array.map{ |v| v.to_i }
p new_array

Output result
[1, 2, 3]

join method

Convert each element of the array to a string and combine the arguments as delimiters

array = ["hello", "new", "world"]
p array.join(" ")

Output result
"hello new world"

push method

Add an argument as an element to the end of the array

array = ["a", "b", "c"]
p array.push("d")

Output result
["a", "b", "c", "d"]

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