ruby sort_by 两次 [英] ruby sort_by twice
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问题描述
Ruby 在 Enumerables 上有一个 sort_by 方法.极好的!所以你可以做类似的事情
Ruby has a sort_by method on Enumerables. Fantastic! So you can do something like
entries.sort_by { |l| l.project.name }
这将按项目名称对一堆条目进行排序.您如何才能在具有相同名称的项目中按照时间对条目进行排序?
That would sort a bunch of entries by their project names. How could you work it so that within projects that had the same name, entries were sorted by their time?
推荐答案
我建议将要排序的列放入数组中.
I would suggest putting the column you want to sort by into an array.
entries.sort_by { |l| [l.project.name, l.project.time] }
这将尊重每种类型的自然排序顺序.
This will respect the natural sort order for each type.
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