Ruby Array take_while()函数

Array#take_while() : take_while()是一个数组类方法，它将元素返回给区块，直到区块返回nil或false。

语法。Array.take_while()

参数。数组

返回：元素到区块，直到区块返回nil或false。

例子 #1 :

# Ruby code for take_while() 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]
  
# take_while
puts "take_while method : #{a.take_while {|num| num > 10 }}\n\n"
  
# take_while
puts "take_while method : #{b.take_while {|x| x.odd? }}\n\n"

输出:

take_while method : [18, 22, 33]

take_while method : [1]

例子 #2 :

# Ruby code for take_while() 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]
  
# take_while
puts "take_while method : #{c.take_while {|num| num > 10 }}\n\n"
  
# take_while
puts "take_while method : #{c.take_while {|num| num.even? }}\n\n"

输出:

take_while method : [18, 22]

take_while method : [18, 22]