我想减少这个，注意这里我有一个我知道标记为唯一标识符的字段:

对此:

最佳答案

我是通过编写这个函数来实现的(基本上是将键复制到结构中，如果它不存在并将其添加到最终数组中):

<cffunction name="RemoveDuplicatesFromObjectArray">
    <cfargument name="objs" type="array">
    <cfargument name="key" type="string">
    <cfscript>
        var keys ={};
        var result = [];
        for (var obj in arguments.objs)
        {
            if (not StructKeyExists(keys, obj[arguments.key]))
            {
                ArrayAppend(result, obj);
                keys[obj[arguments.key]] = true;
            }
        }
    </cfscript>

    <cfreturn result>
</cffunction>

并这样调用它:

<cfset arr = [{
                    "EXPENSEREPORTID": 129591,
                    "EXPENSELINEITEMID": 602684,
                    "DOLLARSBEFORE": 8.1000000000,
                    "DOLLARSAFTER": 5.4000000000
                }, {
                    "EXPENSEREPORTID": 129591,
                    "EXPENSELINEITEMID": 602684,
                    "DOLLARSBEFORE": 8.1000000000,
                    "DOLLARSAFTER": 5.4000000000
                }]> 
<Cfdump var="#RemoveDuplicatesFromObjectArray(arr,'EXPENSEREPORTID')#">

https://stackoverflow.com/questions/39882261/