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POLINQ: How to Use RemoveAll without using For loop with Array
 

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  1. POLINQ: How to Use RemoveAll without using For loop with Array
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    <p>I currently have a log object I'd like to remove objects from, based on a LINQ query. I would like to remove all records in the log if the sum of the versions within a program are greater than 60. Currently I'm pretty confident that this'll work, but it seems kludgy:</p> <pre><code> for (int index = 0; index &lt; 4; index++) { Log.RemoveAll(log =&gt; (log.Program[index].Version[0].Value + log.Program[index].Version[1].Value + log.Program[index].Version[2].Value ) &gt; 60); } </code></pre> <p>The Program is an array of 4 values and version has an array of 3 values. Is there a more simple way to do this RemoveAll in LINQ without using the for loop? </p> <p>Thanks for any help in advance!</p> <hr> <p><strong>EDIT:</strong> Unfortunately the type of variable that Program and Version are based off of (which is a constraint of the framework I'm working in) restricts us such that I cannot access the "Any" member. I however confirmed that tzaman's solution works if you have <em>lists</em> by creating some sample code. I'm restricted to array-like variables (see the commented out areas) </p> <pre><code>// I'm restricted to Arrays, but if I had lists, this would work. internal class MyLogCollection { List&lt;MyLog&gt; MyListOfZones = new List&lt;MyLog&gt;(); public void TestRemove() { // Original Implementation for (int i = 0; i &lt; 4; i++) { MyListOfZones.RemoveAll(log =&gt; (log.MyZoneArray[0].MyVersionArray[0].Value + log.MyZoneArray[0].MyVersionArray[1].Value + log.MyZoneArray[0].MyVersionArray[2].Value) &gt; 60); //"Any" method is not available off of intellisense scope on MyZoneArray } // Better Implementation (thanks tzaman!) MyListOfZones.RemoveAll(log =&gt; (log.MyZoneArray.Any(prog =&gt; prog.MyVersionArray.Sum(ver =&gt; ver.Value) &gt; 60))); } } internal class MyLog { //public MyZone[] MyZoneArray = new MyZone[4]; public List&lt;MyZone&gt; MyZoneArray = new List&lt;MyZone&gt;(4); } internal class MyZone { //public MyVersion[] MyVersionArray = new MyVersion[3]; public List&lt;MyVersion&gt; MyVersionArray = new List&lt;MyVersion&gt;(3); } internal class MyVersion { public byte Value { get; set;} } </code></pre> <p>Thanks tzaman!</p>
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    1. COJust `Any` doesn't work, or none of the LINQ operators work? Is it a regular `System.Array` type, or some custom type with an overloaded indexing operator? If the latter, you won't be able to use LINQ afaik, unless you can get an `IEnumerable` out of it somehow. You could pretty easily define an extension method to do that for you (using a for-loop and `yield return`)... if you need an example I could update my answer.
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    2. CO@tzaman - sorry for the late reply - none of the operators work. It is an "array like" object, I'm 90% confident its not a System Array type. I know its not IEnumerable right now :-/. If you do know how to create an IEnumerable, I would greatly appreciate it :-)
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    3. COSee my updated answer.
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