Remove lines from a file: Difference between revisions
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m (Removed (false) comment) |
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=={{header|C sharp}}== |
=={{header|C sharp}}== |
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{{works with|C sharp|6}} |
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<lang csharp>using System; |
<lang csharp>using System; |
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using System.IO; |
using System.IO; |
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public class Rosetta |
public class Rosetta |
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{ |
{ |
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/* C# 6 version: |
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public static void Main() => RemoveLines("foobar.txt", start: 1, count: 2); |
public static void Main() => RemoveLines("foobar.txt", start: 1, count: 2); |
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*/ |
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static void RemoveLines(string filename, int start, int count = 1) => |
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RemoveLines("foobar.txt", start: 1, count: 2); |
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} |
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static void RemoveLines(string filename, int start, int count = 1) { |
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//Reads and writes one line at a time, so no memory overhead. |
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File.WriteAllLines(filename, File.ReadAllLines(filename) |
File.WriteAllLines(filename, File.ReadAllLines(filename) |
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.Where((line, index) => index < start - 1 || index >= start + count - 1)); |
.Where((line, index) => index < start - 1 || index >= start + count - 1)); |
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} |
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}</lang> |
}</lang> |
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