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POFind all consecutive numbers in an int[]
 

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    <p>I want to find all the consecutive numbers in a an ordered int[8] of casual numbers from 0 to 31. The consecutive numbers must be from minimum length of 3 and a max of 5 numbers.</p> <p>In the example the last give me very real problem.</p> <p>ex:</p> <pre><code>int[] = new int[] { 3,7,14,16,23, 28, 29 ,30 } // no result (28,29 is length of 2 numbers) int[] = new int[] { 4,5,6,7,18, 19, 20 ,21 } // 4,5,6,7 (yes! length of 4!!) int[] = new int[] { 2.3.4.5.6.7.8.9 } // two results : 2,3,4 and 5,6,7,8,9 </code></pre> <p>I don't want <em>the solution</em> but just an example of how approach the question because I'm trying using generals and I'm really stuck!</p> <p>Really thanks for help!</p> <p>Christian</p> <p>-this is the code from where I started (not soup from my kitchen)</p> <pre><code>public partial class Test2 : Form { public Test2() { InitializeComponent(); } private void Test2_Load(object sender, EventArgs e) { int[] numbers = new[] { 21, 4, 5, 22, 17, 6, 20, 23 }; // int[] numbers = new[] { 1, 2, 3, 4, 5, 6, 7, 8 }; foreach (Campo r in FindRanges(numbers, 3)) { listBox1.Items.Add(string.Join(", ", r.Select(x =&gt; x.ToString()).ToArray())); } } struct Campo : IEnumerable&lt;int&gt; { readonly int _start; readonly int _count; public Campo(int start, int count) { _start = start; _count = count; } public int Start { get { return _start; } } public int Count { get { return _count; } } public int End { get { return _start + _count - 1; } } public IEnumerator&lt;int&gt; GetEnumerator() { for (int i = 0; i &lt; _count; ++i) { yield return _start + i; } } IEnumerator IEnumerable.GetEnumerator() { return this.GetEnumerator(); } public static Campo operator +(Campo x, int y) { return new Campo(x.Start, x.Count + y); } public Campo removefirst() { return new Campo(this.Start + 3, this.Count); } public Campo removelast() { return new Campo(this.Start, this.Count - 1); } } static IEnumerable&lt;Campo&gt; FindRanges(IEnumerable&lt;int&gt; source, int minCount) { var ordered = source.OrderBy(x =&gt; x); Campo r = default(Campo); foreach (int value in ordered) { if (r.Count == 0) { r = new Campo(value, 1); continue; } if (r.Count == 5) { r = r.removefirst(); continue; } if (value == r.End) { continue; } if ((value == 0 || value == 8 || value == 16 || value == 24) &amp;&amp; (r.Count &gt; minCount)) { continue; } if ((value == 7 || value == 15 || value == 23 || value == 31) &amp;&amp; (r.Count == 1)) { continue; } else if (value == r.End + 1) { r += 1; } else { if (r.Count &gt;= minCount) { yield return r; } r = new Campo(value, 1); } } if (r.Count &gt;= minCount) { yield return r; } } </code></pre> <p>}</p>
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    1. COWhere's the code you used to solve this?
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    2. COif (r.Count == 5) // better (r.count > 5) { r = r.removefirst(); continue; }
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    3. COStart with a sheet of paper, as Jon suggests. It is often easier to begin with a clean plate.
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