title: How to copy word without selection in emacs?
body: <p>I looked into this page: <a href="http://emacswiki.org/emacs/CopyWithoutSelection" rel="nofollow">http://emacswiki.org/emacs/CopyWithoutSelection</a>. </p>
  
  <p>I copied the exactly same code to my .emacs. Somehow, only the copy-line and copy-paragraph work. But what I really want is copy-word. Every time I ran copy-word, I got an error like: "wrong type argument: integerp, nil". The weird thing is the only difference between copy-word and copy-line is copy-thing <code>backward-word</code>forward-word arg instead of <code>beginning-of-line and</code>end-of-line, and all of them are build-in. I was wondering why the copy-line works while the copy-word doesn't.</p>
  
  <p>Can anyone help me out of this? </p>