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function free ( o ) {
for ( var p in o ) {
if ( typeof o[ p ] === "object" ) {
free ( o[ p ] ) ;
}
delete o[ p ];
//console.info( p, o[ p ] );
}
delete o;
}
var o = {
"a": 1,
"b": {
"c": 2,
"d": {
"e": 3
}
}
}
free( o );