红宝石 |数组选择！（）函数

Array#select!() : select!()是一个 Array 类方法，它返回给定的块，传入来自 self 的连续元素，删除块返回 false 值的元素。

Syntax: Array.select!()

Parameter: Array

Return: the given block passing in successive elements from self, deleting elements for which the block returns a false value.

示例 #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]

示例 #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]