在hash中求和数组的值 [英] Sum the value of array in hash
本文介绍了在hash中求和数组的值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
这是我的数组
This is my array
[{:amount=>10, :gl_acct_id=>1, :alt_amount=>20}, {:amount=>20, :gl_acct_id=>2
, :alt_amount=>30}]
我想要的结果
i want result
[{:amount => 30}] or {:amount = 30}
任何想法?
推荐答案
您可以使用 inject
来总和所有金额。如果需要的话,你可以把结果放回散列。
You can use inject
to sum all the amounts. You can then just put the result back into a hash if you need to.
arr = [{:amount=>10, :gl_acct_id=>1, :alt_amount=>20}, {:amount=>20, :gl_acct_id=>2, :alt_amount=>30}]
amount = arr.inject(0) {|sum, hash| sum + hash[:amount]} #=> 30
{:amount => amount} #=> {:amount => 30}
这篇关于在hash中求和数组的值的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文