in wicket-examples/src/main/webapp/js-test/lib/qunit.js [1275:1335]
"object": function( b, a ) {
/*jshint forin:false */
var i, j, loop, aCircular, bCircular,
// Default to true
eq = true,
aProperties = [],
bProperties = [];
// comparing constructors is more strict than using
// instanceof
if ( a.constructor !== b.constructor ) {
// Allow objects with no prototype to be equivalent to
// objects with Object as their constructor.
if ( !( ( getProto( a ) === null && getProto( b ) === Object.prototype ) ||
( getProto( b ) === null && getProto( a ) === Object.prototype ) ) ) {
return false;
}
}
// stack constructor before traversing properties
callers.push( a.constructor );
// track reference to avoid circular references
parents.push( a );
parentsB.push( b );
// be strict: don't ensure hasOwnProperty and go deep
for ( i in a ) {
loop = false;
for ( j = 0; j < parents.length; j++ ) {
aCircular = parents[ j ] === a[ i ];
bCircular = parentsB[ j ] === b[ i ];
if ( aCircular || bCircular ) {
if ( a[ i ] === b[ i ] || aCircular && bCircular ) {
loop = true;
} else {
eq = false;
break;
}
}
}
aProperties.push( i );
if ( !loop && !innerEquiv( a[ i ], b[ i ] ) ) {
eq = false;
break;
}
}
parents.pop();
parentsB.pop();
callers.pop(); // unstack, we are done
for ( i in b ) {
bProperties.push( i ); // collect b's properties
}
// Ensures identical properties name
return eq && innerEquiv( aProperties.sort(), bProperties.sort() );
}