instance method
Array#compact!
() -> self?
compact! → self or nil
array.c
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static VALUE
rb_ary_compact_bang(VALUE ary)
{
VALUE *p, *t, *end;
long n;
rb_ary_modify(ary);
p = t = (VALUE *)RARRAY_CONST_PTR(ary); /* WB: no new reference */
end = p + RARRAY_LEN(ary);
while (t < end) {
if (NIL_P(*t)) t++;
else *p++ = *t++;
}
n = p - RARRAY_CONST_PTR(ary);
if (RARRAY_LEN(ary) == n) {
return Qnil;
}
ary_resize_smaller(ary, n);
return ary;
}
Removes all nil elements from self; Returns self if any elements are removed, nil otherwise:
Example
a = [nil, 0, nil, false, nil, '', nil, [], nil, {}] a.compact! # => [0, false, "", [], {}] a # => [0, false, "", [], {}] a.compact! # => nil
Related: Array#compact; see also Methods for Deleting.