红宝石 |可枚举的 each_with_object()函数

enumerable的each_with_object()是 Ruby 中的一个内置方法，它对每个对象进行迭代并返回初始对象。如果没有给出块，它返回枚举器。

Syntax: enu.each_with_object(obj) { |obj| block }

Parameters: The function takes the block which is used to initialise the initial object.

Return Value: It returns the enumerator, if no block is given, else it returns the initial object.

示例 1 ：

# Ruby program for each_with_object method in Enumerable
  
# Initialize 
enu = [7, 9, 10]
  
# Prints each with object
enu.each_with_object([]) { |obj, el| el << obj+10 }

输出：

[17, 19, 20]

示例 2 ：

# Ruby program for each_with_object method in Enumerable
  
# Initialize 
enu = [7, 9, 10]
  
# Prints each with object
enu.each_with_object([])

输出：

Enumerator: [7, 9, 10]:each_with_object([])