rails in_groups和in_groups_of之间有什么区别？

Question

这两种方法听起来都应该做同样的事情,但它们看起来并不是彼此的别名.in_groups和之间有什么区别in_groups_of？

• Array#in_groups
• Array#in_groups_of

Answer 1

文档很清楚.

in_groups(number, fill_with = nil)

在阵列上裂口或迭代数 组,填充任何剩余时隙与fill_with除非它是假的.

in_groups_of(number, fill_with = nil)

以大小 编号的组拆分或迭代数组,用fill_with填充任何剩余的插槽,除非它是假的.

例:

# Splits in groups of 2
["a","b","c","d","e","f"].in_groups_of(2)
# => [["a", "b"], ["c", "d"], ["e", "f"]]

# Splits in 2 groups
["a","b","c","d","e","f"].in_groups(2)
# => [["a", "b", "c"], ["d", "e", "f"]]