each_line(...)
public
Splits str using the supplied parameter as the record separator
($/ by default), passing each substring in
turn to the supplied block. If a zero-length record separator is supplied,
the string is split into paragraphs
delimited by multiple successive newlines.
print "Example one\n"
"hello\nworld".each {|s| p s}
print "Example two\n"
"hello\nworld".each('l') {|s| p s}
print "Example three\n"
"hello\n\n\nworld".each('') {|s| p s}
produces:
Example one
"hello\n"
"world"
Example two
"hel"
"l"
"o\nworl"
"d"
Example three
"hello\n\n\n"
"world"
Show source
/*
* call-seq:
* str.each(separator=$/) {|substr| block } => str
* str.each_line(separator=$/) {|substr| block } => str
*
* Splits <i>str</i> using the supplied parameter as the record separator
* (<code>$/</code> by default), passing each substring in turn to the supplied
* block. If a zero-length record separator is supplied, the string is split
* into paragraphs delimited by multiple successive newlines.
*
* print "Example one\n"
* "hello\nworld".each {|s| p s}
* print "Example two\n"
* "hello\nworld".each('l') {|s| p s}
* print "Example three\n"
* "hello\n\n\nworld".each('') {|s| p s}
*
* <em>produces:</em>
*
* Example one
* "hello\n"
* "world"
* Example two
* "hel"
* "l"
* "o\nworl"
* "d"
* Example three
* "hello\n\n\n"
* "world"
*/
static VALUE
rb_str_each_line(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
VALUE rs;
int newline;
char *p = RSTRING(str)->ptr, *pend = p + RSTRING(str)->len, *s;
char *ptr = p;
long len = RSTRING(str)->len, rslen;
VALUE line;
if (rb_scan_args(argc, argv, "01", &rs) == 0) {
rs = rb_rs;
}
RETURN_ENUMERATOR(str, argc, argv);
if (NIL_P(rs)) {
rb_yield(str);
return str;
}
StringValue(rs);
rslen = RSTRING(rs)->len;
if (rslen == 0) {
newline = '\n';
}
else {
newline = RSTRING(rs)->ptr[rslen-1];
}
for (s = p, p += rslen; p < pend; p++) {
if (rslen == 0 && *p == '\n') {
if (*++p != '\n') continue;
while (*p == '\n') p++;
}
if (RSTRING(str)->ptr < p && p[-1] == newline &&
(rslen <= 1 ||
rb_memcmp(RSTRING(rs)->ptr, p-rslen, rslen) == 0)) {
line = rb_str_new5(str, s, p - s);
OBJ_INFECT(line, str);
rb_yield(line);
str_mod_check(str, ptr, len);
s = p;
}
}
if (s != pend) {
if (p > pend) p = pend;
line = rb_str_new5(str, s, p - s);
OBJ_INFECT(line, str);
rb_yield(line);
}
return str;
}