[英]C# find differences between arrays of objects
我有一個名為props的數組,其中包含n個對象數組,所有數組包含相同數量的對象。
每個對象都具有4個屬性:session_enabled,name,pathing_enabled,id,並且對於相同的屬性id,這些屬性在其他數組中可以具有不同的值...
我的目標是找到在其他對象數組中不同的所有對象屬性,並將它們存儲在另一個名為diffs的數組中。
例:
[
[
{participation_enabled:"false", name:"PropEins", pathing_enabled:"true", id:"prop1"},
{participation_enabled:"false", name:"User Status", pathing_enabled:"false", id:"prop2"},
{participation_enabled:"false", name:"Initial ID", pathing_enabled:"false", id:"prop3"},
{participation_enabled:"false", name:"User ID", pathing_enabled:"false", id:"prop4"},
{participation_enabled:"false", name:"Subdomain", pathing_enabled:"false", id:"prop5"}
],
[
{participation_enabled:"false", name:"PropEins", pathing_enabled:"false", id:"prop1"},
{participation_enabled:"false", name:"Room", pathing_enabled:"false", id:"prop2"},
{participation_enabled:"false", name:"Phase", pathing_enabled:"false", id:"prop3"},
{participation_enabled:"false", name:"Custom Insight 4", pathing_enabled:"false", id:"prop4"},
{participation_enabled:"false", name:"Subdomain", pathing_enabled:"false", id:"prop5"}
],
[
{participation_enabled:"true", name:"PropEins", pathing_enabled:"true", id:"prop1"},
{participation_enabled:"true", name:"User Status", pathing_enabled:"true", id:"prop2"},
{participation_enabled:"true", name:"Trackingcode", pathing_enabled:"true", id:"prop3"},
{participation_enabled:"false", name:"User ID", pathing_enabled:"false", id:"prop4"},
{participation_enabled:"false", name:"Subdomain", pathing_enabled:"false", id:"prop5"}
]
]
執行后, diff
數組應為:
[
{id:"prop1", participation_enabled:["false","true"], pathing_enabled:["false","true"], index:0},
{id:"prop2", participation_enabled:["false","true"], name:["User Status","Room"], participation_enabled:["false","true"], pathing_enabled:["false","true"], index:1},
{id:"prop3", participation_enabled:["false","true"], name:["Initial ID","Phase","Trackingcode"], participation_enabled:["false","true"], pathing_enabled:["false","true"], index:2},
{id:"prop4", name:["User ID","Custom Insight 4"], pathing_enabled:["false","true"], index:3}
]
這是使用帶有underscoreJS
javascript
來實現的:
var diff = {};
a.forEach(function(val, i){
//first just init start object
if (i == 0) {
val.forEach(function(v1, ind){
diff[v1.id] = {};
diff[v1.id].index = [ind];
for (var key in v1) {
diff[v1.id][key] = [v1[key]];
}
});
}
else {
//for all other values add them into array and remove dups
val.forEach(function(v1){
var id = v1.id;
for (var key in v1) {
diff[id][key].push(v1[key]);
}
});
}
});
//now finalize data removing all that have only unique values
for (var key in diff) {
var nested = diff[key];
var index = nested.index.pop();
for (nestedKey in nested) {
nested[nestedKey] = _.filter(nested[nestedKey], function(item, pos) {
return nested[nestedKey].indexOf(item) == pos;
});
if (nested[nestedKey].length < 2) {delete nested[nestedKey];}
}
diff[key].id = key;
diff[key].index = index
if (_.keys(diff[key]).length < 3) {delete diff[key];}
}
diff = _.values(diff);
任何建議和想法都會對我有很大幫助。
看看IEqualityComparer
( https://msdn.microsoft.com/it-it/library/ms132151 ( v= IEqualityComparer
) IEqualityComparer
)和Except
( https://msdn.microsoft.com/it-it/庫/bb336390(v=vs.110).aspx )。
一種方法可能是創建一個自定義比較器,然后將數據兩兩比較。 或者,您可以對所有元素進行分組,但不包括出現次數更多的元素。
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