each ()
public
Iterates over the elements of range, passing each in turn to the block.
The each begin object of the range supports the
succ method. A TypeError is raised
if the object does not have succ method defined (like Float ).
If no block is given, an enumerator is returned instead.
( 10 .. 15 ). each {| n | print n , ' ' }
( 2.5 .. 5 ). each {| n | print n , ' ' }
Show source static VALUE
range_each(VALUE range)
{
VALUE beg, end;
RETURN_SIZED_ENUMERATOR(range, 0, 0, range_enum_size);
beg = RANGE_BEG(range);
end = RANGE_END(range);
if (FIXNUM_P(beg) && FIXNUM_P(end)) { /* fixnums are special */
long lim = FIX2LONG(end);
long i;
if (!EXCL(range))
lim += 1;
for (i = FIX2LONG(beg); i < lim; i++) {
rb_yield(LONG2FIX(i));
}
}
else if (SYMBOL_P(beg) && SYMBOL_P(end)) { /* symbols are special */
VALUE args[2];
args[0] = rb_sym_to_s(end);
args[1] = EXCL(range) ? Qtrue : Qfalse;
rb_block_call(rb_sym_to_s(beg), rb_intern("upto"), 2, args, sym_each_i, 0);
}
else {
VALUE tmp = rb_check_string_type(beg);
if (!NIL_P(tmp)) {
VALUE args[2];
args[0] = end;
args[1] = EXCL(range) ? Qtrue : Qfalse;
rb_block_call(tmp, rb_intern("upto"), 2, args, each_i, 0);
}
else {
if (!discrete_object_p(beg)) {
rb_raise(rb_eTypeError, "can't iterate from %s",
rb_obj_classname(beg));
}
range_each_func(range, each_i, 0);
}
}
return range;
}