jQuery 源代码中的 indexOf.call 与 array.indexOf

Array.prototype.indexOf.call(array, searchElement, fromIndex);

array.indexOf(searchElement, fromIndex);

var rclass = /[\t\r\n\f]/g;
var rnotwhite = (/\S+/g);
var rtypenamespace = /^([^.]*)(?:\.(.+)|)$/;
var rcheckableType = ( /^(?:checkbox|radio)$/i );
var rscriptType = ( /^$|\/(?:java|ecma)script/i );
var rleadingWhitespace = ( /^\s+/ );
var rnative = ( /^[^{]+\{\s*\[native \w/ );

var type = ( obj.constructor && obj.constructor.prototype.toString().match( rtypenamespace ) || [ "", "" ] )[ 1 ].toLowerCase();

var isFunction = function isFunction( obj ) {
  return jQuery.type(obj) === "function";
};

var isArrayLike = function isArrayLike( obj ) {
  var length = !!obj && "length" in obj && obj.length,
    type = jQuery.type( obj );

  if ( jQuery.isWindow( obj ) ) {
    return false;
  }

  return type === "array" || length === 0 ||
    typeof length === "number" && length > 0 && ( length - 1 ) in obj;
};

var Sizzle = ( function( window ) {
  var i,
    support,
    Expr,
    getText,
    isXML,
    tokenize,
    compile,
    select,
    outermostContext,
    sortInput,
    hasDuplicate,
    setDocument,
    document,
    docElem,
    documentIsHTML,
    rbuggyQSA,
    rbuggyMatches,
    matches,
    contains,
    expando = "sizzle" + 1 * new Date(),
    preferredDoc = window.document,
    dirruns = 0,
    done = 0,
    classCache = createCache(),
    tokenCache = createCache(),
    compilerCache = createCache(),
    sortOrder = function( a, b ) {
      if ( a === b ) {
        hasDuplicate = true;
      }
      return 0;
    },

var type = ( obj.constructor && obj.constructor.prototype.toString().match( rtypenamespace ) || [ "", "" ] )[ 1 ].toLowerCase();