<span style>Regarding Nadav's point, here's a real world use case:</span><div><span style><br></span></div><div><span style><font color="#222222" face="arial, sans-serif">  <a href="https://github.com/khs4473/JiaDOM/blob/master/src/DOMSet.js#L28-44">https://github.com/khs4473/JiaDOM/blob/master/src/DOMSet.js#L28-44</a></font></span></div>
<div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif">The function "_manip" returns a function that is parameterized by the input string.</font></div>
<div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif">  <a href="https://github.com/khs4473/JiaDOM/blob/master/src/DOMSet.js#L387-403">https://github.com/khs4473/JiaDOM/blob/master/src/DOMSet.js#L387-403</a></font></div>
<div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif">In the "class" definition, the "_manip" function is used to concisely generate a set of methods.</font></div>
<div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif">kevin</font></div>