method

each

v1_9_1_378 - Show latest stable - Class: IO

each(*args)

public

Executes the block for every line in ios, where lines are separated by sep. ios must be opened for reading or an IOError will be raised.

f = File.new("testfile")
f.each {|line| puts "#{f.lineno}: #{line}" }

produces:

1: This is line one
2: This is line two
3: This is line three
4: And so on...

static VALUE
rb_io_each_line(int argc, VALUE *argv, VALUE io)
{
    VALUE str, rs;
    long limit;

    RETURN_ENUMERATOR(io, argc, argv);
    prepare_getline_args(argc, argv, &rs, &limit, io);
    while (!NIL_P(str = rb_io_getline_1(rs, limit, io))) {
        rb_yield(str);
    }
    return io;
}

each

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