Object#!~

obj !~ other → true or false

static VALUE
rb_obj_not_match(VALUE obj1, VALUE obj2)
{
    VALUE result = rb_funcall(obj1, id_match, 1, obj2);
    return rb_obj_not(result);
}

Returns true if two objects do not match (using the =~ method), otherwise false.

See also .yaml_tag #<=> #=== also in 4.1 · 4.0 · 3.4 · 3.2 · 3.1 · 3.0