In my sinatra app I have the code of
在我的sinatra应用程序中，我有代码
haml :"page123", locals:
{
items: (my_data.sort ->(item1, item2){ item2[:date] <=> item1[:date]}),
},
layout: need_layout?
What I need to do is to sort my_data by date in descending order. However, I' getting the error here
我需要做的是按日期降序排序my_data。但是，我在这里得到错误
wrong number of arguments(1 for 0)
What did I do wrong?
我做错了什么？
1 个解决方案
#1
3
Enumerable#sort does not take any arguments. You are essentially passing a Lambda object as the first and only argument to the sort method. What you can do is supply a block to be used to sort the collection.
可枚举#s排序不带任何参数。您实际上是将Lambda对象作为sort方法的第一个也是唯一的参数传递。您可以做的是提供一个用于对集合进行排序的块。
wrong number of arguments(1 for 0) is saying that the method was given 1 argument and expected 0.
错误的参数数量（1表示0）表示该方法被赋予1个参数且预期为0。
Try this:
尝试这个：
my_data.sort{ |a, b| b[:date] <=> a[:date] }
#1
3
Enumerable#sort does not take any arguments. You are essentially passing a Lambda object as the first and only argument to the sort method. What you can do is supply a block to be used to sort the collection.
可枚举#s排序不带任何参数。您实际上是将Lambda对象作为sort方法的第一个也是唯一的参数传递。您可以做的是提供一个用于对集合进行排序的块。
wrong number of arguments(1 for 0) is saying that the method was given 1 argument and expected 0.
错误的参数数量（1表示0）表示该方法被赋予1个参数且预期为0。
Try this:
尝试这个：
my_data.sort{ |a, b| b[:date] <=> a[:date] }