Ruby编程之数组、多维数组和遍历

def hello
  return "hello world"
end
x = [1+2, hello, `dir`]
y = %w( this is an array of strings )
for i in x
  puts(i.inspect)
end
for i in y
  puts(i.inspect)
end

3
"hello world"
" \xC7\xFD\xB6\xAF\xC6\xF7 C \xD6еľ\xED\xCA\xC7 windows\n \xBE\xED\xB5\xC4\xD0\xF2\xC1к\xC5\xCA\xC7 EEAC-26C7\n\n C:\\Users\\Administrator\\RubymineProjects\\untitled \xB5\xC4Ŀ¼\n\n2022/11/01  08:18    <DIR>         
"this"
"is"
"an"
"array"
"of"
"strings"

a = Array.new # an empty array
for i in a
  puts(i.inspect)
end
a = Array.new(2) # [nil,nil]
for i in a
  puts(i.inspect)
end
a = Array.new(2,"hello world") # ["hello world","hello world"]
for i in a
  puts(i.inspect)
end
a = Array.new(2)
for i in a
  puts(i.inspect)
end
a[0]= Array.new(2,'hello')
for i in a[0]
  puts(i.inspect)
end
a[1]= Array.new(2,'world')
for i in a[1]
  puts(i.inspect)
end
a = [ [1,2,3,4],
      [5,6,7,8],
      [9,10,11,12],
      [13,14,15,16] ]
for i in a
  puts(i.inspect)
end
multiarr = [['one','two','three','four'],[1,2,3,4]]
for i in multiarr
  puts(i.inspect)
end

nil
nil
"hello world"
"hello world"
nil
nil
"hello"
"hello"
"world"
"world"
[1, 2, 3, 4]
[5, 6, 7, 8]
[9, 10, 11, 12]
[13, 14, 15, 16]
["one", "two", "three", "four"]
[1, 2, 3, 4]

开发环境:Rubymine

The book of Ruby----A hands-on guide for the Adventurous---[美]Huw Collingbourne---no starch press