使用struct key对隐式结构的隐式数组进行排序 [英] Sorting an implicit array of implicit structs by struct key

问题描述

根据第一个在这篇博客中的例子，我有一个隐式数组的隐式结构。我的数据实际上很相似，例如：

Based on the first example in this blog post, I have an implicit array of implicit structs. My data is actually pretty similar, e.g.:

<cfset ReportsArray = [
  {
    Name = "My First Report",
    Group = "Group One"
  },
  {
    Name = "My Second Report",
    Group = "Group Two"
  },
  {
    Name = "My Third Report"
    Group = "Group One"
  },
  ...etc...
]>

我决定以这种格式创建数据，这样我可以稍后将新报告推送到数组在任何组中，或者只需要重新写入一个新的报告列表（如果需要）。我想知道是否可以根据组键在结构中排序这个数组，以便我可以循环通过它们并输出如下：

I decided to create the data in this format so that I can later push a new report to the array in any group, or just rewrite the array with a new list of reports if needed. I'm wondering if it's possible to sort this array based on the "Group" key in the structs so that I can loop through them and output something like this:

第一组

我的第一份报告

我的第三份报告

第二组

我的第二份报告

-

这是否有意义？

推荐答案

也许查询会是正确的工作数据类型吗？使用ColdFusion的着名的查询查询，排序这样的数据是一块蛋糕。

Maybe Query would be the right data type for the right job? with ColdFusion's famous Query of Queries, sorting data like this is a piece of cake.

如果你真的想排序对象数组，而你在CF10 +你是运气。您可以使用ArraySort与回调函数： https://wikidocs.adobe.com/wiki/display/ coldfusionen / ArraySort 。

If you really want to sort an array of objects, and you're in CF10+, you are in luck. You may use ArraySort with callback: https://wikidocs.adobe.com/wiki/display/coldfusionen/ArraySort.

如果你坚持，这里是一个易于阅读的气泡排序，将工作在CF8：

If you insist, here's a easy to read bubble sort that would work in CF8:

<cfscript>

    function sortReports(reports) 
    {
        var local = {};

        local.sorted = false;
        local.reportSize = arrayLen(reports);

        while (!local.sorted) 
        {
            local.sorted = true;
            for (local.i = 1; local.i < local.reportSize ; local.i = local.i + 1) 
            {
                local.report1 = reports[local.i];
                local.report2 = reports[local.i + 1];

                if (local.report1.group > local.report2.group)
                {
                    arraySwap(reports, local.i, local.i + 1);
                    local.sorted = false;
                }
            }
        }

        return reports;
    }

reportsArray = [
  {
    Name = "My First Report",
    Group = "Group One"
  },
  {
    Name = "My Second Report",
    Group = "Group Two"
  },
  {
    Name = "My Third Report",
    Group = "Group One"
  }
];
</cfscript>
<cfdump var="#sortReports(reportsArray)#">

在这里运行： http://www.trycf.com/scratch-pad/pastebin?id=RuSHgZYq

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