Ruby 数组map!()操作
Array#map!() : map!()是一个Array类方法,它返回一个新的数组,其中包含该块返回的值。
语法。Array.map!()
参数。数组
返回:一个新的数组,包含由块返回的值。
例子 #1 :
# Ruby code for map!() method
# declaring array
a = [18, 22, 33, 3, 5, 6]
# declaring array
b = [1, 4, 1, 1, 88, 9]
# declaring array
c = [18, 22, 3, 3, 50, 6]
# map!
puts "map! method : #{a.map! {|num| num > 10 }}\n\n"
# map!
puts "map! method : #{b.map! {|x| x.odd? }}\n\n"
输出:
map! method : [true, true, true, false, false, false]
map! method : [true, false, true, true, false, true]
例子 #2 :
# Ruby code for map!() method
# declaring array
a = [18, 22, 33, 3, 5, 6]
# declaring array
b = [1, 4, 1, 1, 88, 9]
# declaring array
c = [18, 22, 3, 3, 53, 6]
# map!
puts "map! method : #{c.map! {|num| num > 10 }}\n\n"
# map!
puts "map! method : #{a.map! {|num| num > 10 }}\n\n"
输出:
map! method : [true, true, false, false, true, false]
map! method : [true, true, true, false, false, false]