Detailed explanation of using iterator to traverse file information_PHP tutorial

1. Iterate the lines of the file

Copy the code The code is as follows:

public static IEnumerable ReadLines(string fileName)
{
using (TextReader reader = File.OpenText(fileName))
{
string line;
if (( line = reader.ReadLine()) != null)
                                                                                                                                                                  static void Main()
{
foreach (string line in Iterator.ReadLines(" "))
                                                                                                                                                                                                                                                 Console.WriteLine. proceed Filter




Copy code

The code is as follows:

public static IEnumerable where(IEnumerable predicate)
{ if (source == null || predicate == null)
{ throw new ArgumentNullException();

        }                                                                                                              WhereImplemeter(source, predicate); } private static IEnumerable WhereImplemeter(IEnumerable source, Predicate predicate) foreach (T item in source )

                                                                                                       

                                                                                                                                                                                 
IEnumerable lines = File.ReadAllLines(@"your file name");
Predicate predicate = delegate(string line)
return line .StartsWith("using" );
                                                                          🎜>
}

http://www.bkjia.com/PHPjc/327537.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/327537.htmlTechArticle1. The line copy code of the iterated file is as follows: public static IEnumerablestring ReadLines(string fileName) { using (TextReader reader = File.OpenText(fileName)) { string line; if (...