Run-length encoding: Difference between revisions
Content added Content deleted
(→Linq: More idiomatic Linq and faster) |
(→Linq: Updated short linq solution to match) |
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using System.Linq; |
using System.Linq; |
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using static System.Console; |
using static System.Console; |
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using MoreLinq; // best/most popular addon library for linq - NOT using built in runlengthencoding() method here |
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namespace RunLengthEncoding |
namespace RunLengthEncoding |
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{ |
{ |
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static class Program |
static class Program |
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{ |
{ |
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public static string Encode(string input) => input |
public static string Encode(string input) => input.Length ==0 ? "" : input.Skip(1) |
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. |
.Aggregate((t:input[0].ToString(),o:Empty<string>()), |
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(a,c)=>a.t[0]==c ? (a.t+c,a.o) : (c.ToString(),a.o.Append(a.t)), |
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a=>a.o.Append(a.t).Select(p => (key: p.Length, chr: p[0]))); |
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public static string Decode(IEnumerable<(int i , char c)> input) => |
public static string Decode(IEnumerable<(int i , char c)> input) => |
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