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Warning: session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in /var/www/tb-usercake/models/config.php on line 51
// uses identity to compare a and new value static class WeakAssoc { O f; // func(A) -> B WeakReference a; B b; *() {} *(O *f) {} synchronized B get(A a) { if (a != (this.a != null ? this.a.get() : null)) { b = (B) callF(f, a); this.a = new WeakReference(a); } ret b; } }