Ruby Array take_while()用法及代码示例

Array＃take_while()：take_while()是一个Array类方法，该方法将元素返回到块，直到该块返回nil或false。

用法：Array.take_while()

参数：数组

返回：元素，直到该块返回nil或false。

示例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]

示例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]

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