如何在两个结构上进行"深度比较"或"差异"？

Question

(这是一个冷血问题)

我有两个不同的结构,可能包含或不包含相同的数据,我希望能够看到它们是否存在!我的结构将始终包含简单值(数字,字符串或布尔值),因为它们是使用DeserializeJSON创建的,所以希望这可以轻松完成.

我在这里发现了Ben Nadel的帖子,但这种技术似乎对我不起作用.这是我到目前为止所尝试的(其中有一些cfwheels代码):

itemA = DeSerializeJSON(model("itemsnapshot").findByKey(4).json);
itemB = DeSerializeJSON(model("itemsnapshot").findByKey(5).json);

StructDelete(itemA,"updatedAt");
StructDelete(itemB,"updatedAt");
StructDelete(itemA,"createdAt");
StructDelete(itemB,"createdAt");

writedump(itemA);
writedump(itemB);

out = itemA.Equals(itemB);
writedump(out);

结果如下:

Struct
code string C112
companyid number 1
cost number 5000
deletedAt string 
description string Nightstand
id number 70634
itemtypeid string 13
projectid number 8
unittypeid string

Struct
code string C112
companyid number 1
cost number 5000
deletedAt string 
description string Nightstand
id number 70634
itemtypeid string 13
projectid number 8
unittypeid string 

boolean false

因此,正如您将在上面看到的那样,尽管Structs中的数据看起来完全匹配,但它们不会通过Equals()测试.

还有其他人成功完成了吗？

Answer 1

这是Ben的解决方案,可以根据我的需求快速调整,你可以进一步调整它(希望它能更好地调整它):

<cffunction name="DiffStructs" hint="Compute the differences between two structures" access="public" output="true" returntype="array" >
        <cfargument name="First" type="struct" required="true" />
        <cfargument name="Second" type="struct" required="true" />
        <cfargument name="ignoreMissing" type="boolean" required="false" default="false" />
        <cfargument name="ignoreFirstEmptyString" type="boolean" required="false" default="false" />
        <cfargument name="ignoreSecondEmptyString" type="boolean" required="false" default="false" />

        <cfset var Result = arrayNew(1) >
        <cfset var Keys = structNew() >
        <cfset var KeyName = "" >
        <cfset var obj = "" >
        <cfset var firstOk = true >
        <cfset var secondOk = true >

        <cfloop collection="#Arguments.First#" item="KeyName">
                <cfset Keys[KeyName]=1>
        </cfloop>
        <cfloop collection="#Arguments.Second#" item="KeyName">
                <cfset Keys[KeyName]=1>
        </cfloop>
        <cfloop collection="#Keys#" item="KeyName">
            <cfif NOT StructKeyExists(Arguments.First, KeyName)  >
                    <cfif NOT arguments.ignoreMissing>
                        <cfif structFind(Arguments.Second, KeyName) neq "">
                            <cfif arguments.ignoreSecondEmptyString>
                                <cfset obj = {  key = KeyName
                                                ,old = ""
                                                ,new = structFind(Arguments.Second, KeyName) } >
                                <cfset arrayAppend(Result, obj )>
                            </cfif>
                        </cfif>
                    </cfif>

            <cfelseif NOT StructKeyExists(Arguments.Second, KeyName)>
                    <cfif NOT arguments.ignoreMissing>
                        <cfif structFind(Arguments.First, KeyName) neq "">
                            <cfif arguments.ignoreFirstEmptyString >
                                <cfset obj = {  key = KeyName
                                                ,old = structFind(Arguments.First, KeyName) 
                                                ,new = "" } >
                                <cfset arrayAppend(Result, obj )>
                            </cfif>
                        </cfif>
                    </cfif>

            <cfelseif Arguments.First[KeyName] NEQ Arguments.Second[KeyName] >

                <cfset firstOk = true >
                <cfset secondOk = true >

                <cfif structFind(Arguments.Second, KeyName) eq "">
                    <cfif arguments.ignoreSecondEmptyString>
                        <cfset firstOk = false >
                    </cfif>
                </cfif>

                <cfif structFind(Arguments.First, KeyName) eq "">
                    <cfif arguments.ignoreFirstEmptyString>
                        <cfset secondOk = false >
                    </cfif>
                </cfif>

                <cfif firstOk AND secondOk >
                    <cfset obj = {  key = KeyName
                                    ,old = structFind(Arguments.First, KeyName) 
                                    ,new = structFind(Arguments.Second, KeyName) } >
                    <cfset arrayAppend(Result, obj )>
                </cfif>
            </cfif>

        </cfloop>

        <cfreturn Result>
    </cffunction>