Ruby 数组select()函数
Array#select() : select()是一个数组类方法,它返回一个新的数组,其中包含给定块返回真值的所有元素。
语法。Array.select()
参数。数组
返回。一个新的数组,包含数组中所有给定块返回真值的元素。
例子 #1 :
# Ruby code for select() 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]
# select
puts "select method : #{a.select {|num| num > 10 }}\n\n"
# select
puts "select method : #{b.select {|x| x.odd? }}\n\n"
输出:
select method : [18, 22, 33]
select method : [1, 1, 1, 9]
例子 #2 :
# Ruby code for select() 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]
# select
puts "select method : #{c.select {|num| num > 10 }}\n\n"
# select
puts "select method : #{c.select {|num| num.even? }}\n\n"
输出:
select method : [18, 22, 53]
select method : [18, 22, 6]