each_line(...)
public
Executes the block for every line in ios, where lines are
separated by sep_string. 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...
Show source
/*
* call-seq:
* ios.each(sep_string=$/) {|line| block } => ios
* ios.each_line(sep_string=$/) {|line| block } => ios
*
* Executes the block for every line in <em>ios</em>, where lines are
* separated by <i>sep_string</i>. <em>ios</em> must be opened for
* reading or an <code>IOError</code> will be raised.
*
* f = File.new("testfile")
* f.each {|line| puts "#{f.lineno}: #{line}" }
*
* <em>produces:</em>
*
* 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(argc, argv, io)
int argc;
VALUE *argv;
VALUE io;
{
VALUE str;
VALUE rs;
if (argc == 0) {
rs = rb_rs;
}
else {
rb_scan_args(argc, argv, "1", &rs);
if (!NIL_P(rs)) StringValue(rs);
}
while (!NIL_P(str = rb_io_getline(rs, io))) {
rb_yield(str);
}
return io;
}