function doAdd() {
var argsLength = arguments.length
if (argsLength === 0) {
return 0
} else if (argsLength === 1) {
return arguments[0] + 10
} else if (argsLength === 2) {
return arguments[0] + arguments[1]
}
}
doAdd() // 0
doAdd(5) // 15
doAdd(5, 20) // 25

function text() {
var elem = this.elem
var argsLength = arguments.length
if (argsLength === 0) {
return elem.innerText
} else if (argsLength === 1) {
elem.innerText = arguments[0]
}
} 

// Multifunctional method to get and set values of a collection
// The value/s can optionally be executed if it's a function
var access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
  var i = 0,
    len = elems.length,
    bulk = key == null;
  // Sets many values
  if ( jQuery.type( key ) === "object" ) {
    chainable = true;
    for ( i in key ) {
      access( elems, fn, i, key[ i ], true, emptyGet, raw );
    }
  // Sets one value
  } else if ( value !== undefined ) {
    chainable = true;
    if ( !jQuery.isFunction( value ) ) {
      raw = true;
    }
    if ( bulk ) {
      // Bulk operations run against the entire set
      if ( raw ) {
        fn.call( elems, value );
        fn = null;
      // ...except when executing function values
      } else {
        bulk = fn;
        fn = function( elem, key, value ) {
          return bulk.call( jQuery( elem ), value );
        };
      }
    }
    if ( fn ) {
      for ( ; i < len; i++ ) {
        fn(
          elems[ i ], key, raw ?
          value :
          value.call( elems[ i ], i, fn( elems[ i ], key ) )
        );
      }
    }
  }
  return chainable ?
    elems :
    // Gets
    bulk ?
      fn.call( elems ) :
      len ? fn( elems[ 0 ], key ) : emptyGet;
};

text: function( value ) {
  return access( this, function( value ) {
    return value === undefined ?
      jQuery.text( this ) :
      this.empty().each( function() {
        if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
          this.textContent = value;
        }
      } );
  }, null, value, arguments.length );
},
html: function( value ) {
  return access( this, function( value ) {
    var elem = this[ 0 ] || {},
      i = 0,
      l = this.length;
    if ( value === undefined && elem.nodeType === 1 ) {
      return elem.innerHTML;
    }
    // See if we can take a shortcut and just use innerHTML
    if ( typeof value === "string" && !rnoInnerhtml.test( value ) &&
      !wrapMap[ ( rtagName.exec( value ) || [ "", "" ] )[ 1 ].toLowerCase() ] ) {
      value = jQuery.htmlPrefilter( value );
      try {
        for ( ; i < l; i++ ) {
          elem = this[ i ] || {};
          // Remove element nodes and prevent memory leaks
          if ( elem.nodeType === 1 ) {
            jQuery.cleanData( getAll( elem, false ) );
            elem.innerHTML = value;
          }
        }
        elem = 0;
      // If using innerHTML throws an exception, use the fallback method
      } catch ( e ) {}
    }
    if ( elem ) {
      this.empty().append( value );
    }
  }, null, value, arguments.length );
},

attr: function( name, value ) {
  return access( this, jQuery.attr, name, value, arguments.length > 1 );
},
prop: function( name, value ) {
  return access( this, jQuery.prop, name, value, arguments.length > 1 );
},
// Create scrollLeft and scrollTop methods
jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function( method, prop ) {
  var top = "pageYOffset" === prop;
  jQuery.fn[ method ] = function( val ) {
    return access( this, function( elem, method, val ) {
      var win = getWindow( elem );
      if ( val === undefined ) {
        return win ? win[ prop ] : elem[ method ];
      }
      if ( win ) {
        win.scrollTo(
          !top ? val : win.pageXOffset,
          top ? val : win.pageYOffset
        );
      } else {
        elem[ method ] = val;
      }
    }, method, val, arguments.length );
  };
} );
css: function( name, value ) {
  return access( this, function( elem, name, value ) {
    var styles, len,
      map = {},
      i = 0;
    if ( jQuery.isArray( name ) ) {
      styles = getStyles( elem );
      len = name.length;
      for ( ; i < len; i++ ) {
        map[ name[ i ] ] = jQuery.css( elem, name[ i ], false, styles );
      }
      return map;
    }
    return value !== undefined ?
      jQuery.style( elem, name, value ) :
      jQuery.css( elem, name );
  }, name, value, arguments.length > 1 );
}
// Create innerHeight, innerWidth, height, width, outerHeight and outerWidth methods
jQuery.each( { Height: "height", Width: "width" }, function( name, type ) {
  jQuery.each( { padding: "inner" + name, content: type, "": "outer" + name },
    function( defaultExtra, funcName ) {
    // Margin is only for outerHeight, outerWidth
    jQuery.fn[ funcName ] = function( margin, value ) {
      var chainable = arguments.length && ( defaultExtra || typeof margin !== "boolean" ),
        extra = defaultExtra || ( margin === true || value === true ? "margin" : "border" );
      return access( this, function( elem, type, value ) {
        var doc;
        if ( jQuery.isWindow( elem ) ) {
          // $( window ).outerWidth/Height return w/h including scrollbars (gh-1729)
          return funcName.indexOf( "outer" ) === 0 ?
            elem[ "inner" + name ] :
            elem.document.documentElement[ "client" + name ];
        }
        // Get document width or height
        if ( elem.nodeType === 9 ) {
          doc = elem.documentElement;
          // Either scroll[Width/Height] or offset[Width/Height] or client[Width/Height],
          // whichever is greatest
          return Math.max(
            elem.body[ "scroll" + name ], doc[ "scroll" + name ],
            elem.body[ "offset" + name ], doc[ "offset" + name ],
            doc[ "client" + name ]
          );
        }
        return value === undefined ?
          // Get width or height on the element, requesting but not forcing parseFloat
          jQuery.css( elem, type, extra ) :
          // Set width or height on the element
          jQuery.style( elem, type, value, extra );
      }, type, chainable ? margin : undefined, chainable );
    };
  } );
} );
data: function( key, value ) {
  var i, name, data,
    elem = this[ 0 ],
    attrs = elem && elem.attributes;
  // Gets all values
  if ( key === undefined ) {
    if ( this.length ) {
      data = dataUser.get( elem );
      if ( elem.nodeType === 1 && !dataPriv.get( elem, "hasDataAttrs" ) ) {
        i = attrs.length;
        while ( i-- ) {
          // Support: IE 11 only
          // The attrs elements can be null (#14894)
          if ( attrs[ i ] ) {
            name = attrs[ i ].name;
            if ( name.indexOf( "data-" ) === 0 ) {
              name = jQuery.camelCase( name.slice( 5 ) );
              dataAttr( elem, name, data[ name ] );
            }
          }
        }
        dataPriv.set( elem, "hasDataAttrs", true );
      }
    }
    return data;
  }
  // Sets multiple values
  if ( typeof key === "object" ) {
    return this.each( function() {
      dataUser.set( this, key );
    } );
  }
  return access( this, function( value ) {
    var data;
    // The calling jQuery object (element matches) is not empty
    // (and therefore has an element appears at this[ 0 ]) and the
    // `value` parameter was not undefined. An empty jQuery object
    // will result in `undefined` for elem = this[ 0 ] which will
    // throw an exception if an attempt to read a data cache is made.
    if ( elem && value === undefined ) {
      // Attempt to get data from the cache
      // The key will always be camelCased in Data
      data = dataUser.get( elem, key );
      if ( data !== undefined ) {
        return data;
      }
      // Attempt to "discover" the data in
      // HTML5 custom data-* attrs
      data = dataAttr( elem, key );
      if ( data !== undefined ) {
        return data;
      }
      // We tried really hard, but the data doesn't exist.
      return;
    }
    // Set the data...
    this.each( function() {
      // We always store the camelCased key
      dataUser.set( this, key, value );
    } );
  }, null, value, arguments.length > 1, null, true );
},