a minimal implementation of the original Eliza chatbot by Joe Weizenbaum. transcribed from David Johnson-Davies' awesome LISP blog, source: http://lisp.plasticki.com/list?24NX http://lisp.plasticki.com/show?24GC what I love about this implementation besides its terseness is that it doesn't rely on Regex but instead implements fuzzy pattern matching itself in a set of beautifully simple and elegant functions.data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKAAAAB4CAYAAAB1ovlvAAAAAXNSR0IArs4c6QAAC7xJREFUeF7tnXlUVdUexz93QKYroKKCMZRzOeaE9RybrNTSrGciDpg5lbPkGKSCpGWOSZrPqaXmyyHXew7Zy6HnUK3QzFAcMBwBEVHmi3DvW+dipjw0RNY66xx+Zy3/wX327/f7fj+cfc4+ex8MdrvdjhyigEoKGARAlZSXsA4FBEABQVUFBEBV5ZfgAqAwoKoCAqCq8ktwAVAYUFUBAVBV+SW4ACgMqKqAAKiq/BJcABQGVFVAAFRVfgkuAAoDqiogAKoqvwQXAIUBVRUQAFWVX4ILgMKAqgoIgKrKL8EFQGFAVQUEQFXll+ACoDCgqgICoKryS3ABUBhQVQEBUFX5JbgAKAyoqoAAqKr8ElwAFAZUVUAAVFV+CS4ACgOqKiAAqiq/BBcAhQFVFRAAVZVfgguAwoCqCgiAqsovwQVAYUBVBQRAVeWX4AKgMKCqAgKgqvJLcAFQGFBVAQGwmPw30q6Qm5OJt48/ZqdKqppTEYILgLdctttt7P/3ejbHvI+LUz5GN38GTp5PvaZBFYED1WoUAG9Jf3jfdr6aN4x3BtbC08PM7+dzWP1VGj2GR9Ouax8MBoNqJuk5sAAIZGWkE9Hvb3TrZGbHnhsU2pxo0sBAh7ZViFmdTPeh0XToFgwCYbn/LgiAwKbPIon/fhnpGRAyaRl1GrVi09JZXD62iX5v+LJg+WWCw2Jo0bFruRtQ0TsUAIHo4d1JS7rAq4PDaNc12DHc2myFzBj0PCEvZWI2G1i4IpURH26gbpM2FZ2Zcq1fAAQKbuY7RL3zqff86Tjmj+7GB+Nr4VHZzLETWazcmMPEmG3U9KtdriZU5M4EwBLcP3fyVxZPCuH1LiaCWnjcbrF7fzq7f7Yweel23Ct7VWRuyq12AfAOKW02Gwd3bGDTkqmE9PDkiQYWMrMKqOLphJOTAeUP267bkkyKtTmj5nwh84TlgKEAeEtEa14Oq2eP59KxbQzpV4vkK1bWf52G0bU6TrYrjHzLD5/qlSgosLNw+QVqNulD8JhIDAZjOdhQcbsQAIGb1jzmTwjGk195s0dN9h1M5/vDZobNXMFjTzzJf/+1jl2rpzJtTCCuLkaycwqZteAcz/WfSeeeA/+PHqU/o9mMyWSuuGSVsnIBEIjdu41l4aHUq+1G8lUbteo/xaApC/Dy9nHIqPxR+RWzRuOcsZOQXr6On6Wk5jNnyWVCw1fROKjzbbmVYXzu6Nep6V+H/mFzZO7wL0AUAAFl+D28bxtuFk/86zXCy9uXa8kXWTSpH43bPkuPwRPJy8kiIuRpJo2oSg3vonfEp87mEPNFOmPmbSGwfhPHz65fTWHGgDY4OTkxbeUPVK7iXcprQcVsJgDew/djh75j1+dv4eZqotCjPUM/+Iwty2dTeHEdfXoWXRmV46cjGXz1jY0pS3dSpbov8YcPsHluH8fUTbuQGJq361IxySpl1QLgPYRKT00mKrQtH4z3Y+WXl6nk+wJd+41iwegXiZoUSKVKRQ8fypPx9u+uEnvGl7BFW/hu43JunPgMLw8zOV69eWNEeCmtqJjNBMB7+K7c9815twfPNj9Pk4YWPl11kev5/ly5lMj4ITUd94t/HDYbrP7nZeLOumMovMa4oY+Qdi2fbT/6MfHTrRWTrFJWLQAWE+pE7H7WzJlAs7+94HgISTwwl2ED/CgotPPLsUxSr+XT6emqjqfhO4/CQjsJ53Lxr+Xi+L8bGQXMWJBG1IZYXNzcS2lHxWsmABbz/MKZ43w0/DnaPGnhl7hcWjRxI/i1P+/5SouIMjSHz04gdOZWajdqWdrTKlw7AbCY5coihI9H9SKo7lmeauXlWIhgLONc85btV8iv9nd6j5xe4cAqbcECYAlKKe+Cl4R1Z3pYAC7OZaQPuJRkZfE6O5FrD2Ayy6R0SVAKgCWoojyALAjrS8uAONq3LfuiA+W13fS5ifQYFUNLWUtY4kVRALzHWHHi8H42fxzM1DGPlXY0KbHdmd9ziVmbyfsr9tx+s/JQHersZAHwHoYqbzSiQtsQPTnQcR/4MMeWHVdIKWzP0OlLZW9JMSEFwHuQtWvDUo7uiGbC8MCH3gqSm2dj2uxzjFu0i0dqN3wYlnV3rgBYgqVpyReIHNSJiSNq4FOjfPYGb92ZSqZ7d0LGz9YdRA9TkABYgnrLpg/Hx7iPV7pUfxht7zpXWT0zb1U+ket+wOzkVG79ar0jAbCYg5nX0wjv25qIMb7k5BVy4lS2Y1X0M+2qOhYY/HHYLU1Js7XAtTAed+uPylvhu3tyq0uaoR1O+afxuHkIq7WAKR+eJyxmNz4BdbTOTbnlLwAWk/LowW9ZOi0ETwU2AzSq786J09m82Nn7zykZoxuJzu8RNSKYGn6BTJ8QgLkw5c+eDGauVo9i2qDeuLi6MisiCFd7ImHTT4FzTcL/8S0eVcvv6lpuNKjQkQB4h+jxRw6wLOJtGgZa6dLZGz9fZ478lsmGrSlEjK+Nxd1U1NroxgXLVKLf7YdvYB2mvFMNU0HyXQCm+8whYkiw4z3wjMnNMFkTmDLrNA3rWbC6t2d45HJZzg8IgLewSYiLZfF7bzD4zao0alC0eCD2aCZrNycx+u0AAv1c7r4+WBqT6dwBZ+sxKmXtL2EIrkO2WxeMufG4Zu/l+o18Iued5f1xtZk5/zwTluyVoVgALGJK2cMxc/DzvNIhi1bNirZh3oZvcACB/sXgK8NQte9QOr/FZ/FOqD/rv07GUn8o3QeOK0NP+jpFroDKqub/fM3eNaOZMOJRx8KD+DPZLFtzqejKV0r4lOVYJlPJE9bKPGDEnATHg8yLz1Tj8LFM9h1vwNi56/VFUxmqEQCB+WF9aVfvOK2ae5CUkk/0wkTqPubCyLcCSj0JvfWbVIwGeKqll+PrWso+YuVQwFy14TIpeQ1IO3+UyaMCSEjM4afEZoz8cHUZLNPXKQIgEDnkJXp1TMXibmbh8kt0GRDO7k3LebWjlaCWnqVyXFn/dzIh2/HEXOdRN5o+biHPamPtpiTSCpowcvYadq5dzN6NizGZTfSf8rnsF5F7wCK2fti1kS8/GYvNbqbnsAg69RjAhTNxzB/bi/6vudO8ceVSQfhHI2X19MkzOazbnEJg8270D/sIFzeLY3tnyoWzmMxOVK8V8EB96rWxXAFv7fu9kZaC0WTG445tlAm//cyiiX0Y3NuTxg3dHRuQzp7L5eejGVSr4uTYF6JMzSifDbTm27iSmk/86Rx+OZ6Ns1ddXgmdwJMdXpLplvv89giA9xFH+WxvRP9ODOieR8AjLny5Ndnx1YQWTT2w2ezEHs3AaDRQxctMwU07ZncfOvUcSKPWnQis39gBtBz3V0AAvI8+OVk3iOjbmvDRNfhiYxL5bkGcjYvl1ecqcTEpj6OnXTEZjXTtYMPXx5mNe7yZumyHMPcACgiA9xErNyvD8V64WUM7STmNGfPxOqKGvoyP+zmOn8rm5dD3eaJ1Rz4Z8xpBzQzEnnBm9sbD8k0YAfABFLjvEGxn/YJpxP24x7Hp3Mu7Jrs3rWDtJ5Nwq+xJ1PpDjnvG5PNnWBk9FotXNUbOWinfg3kA+eUK+BdiKU+utsICx5OrcigfHzp55CCVvarhV+fx22cr7ZR/xrJuoXsA0/TUVADUk5sarEUA1KBpekpZANSTmxqsRQDUoGl6SlkA1JObGqxFANSgaXpKWQDUk5sarEUA1KBpekpZANSTmxqsRQDUoGl6SlkA1JObGqxFANSgaXpKWQDUk5sarEUA1KBpekpZANSTmxqsRQDUoGl6SlkA1JObGqxFANSgaXpKWQDUk5sarEUA1KBpekpZANSTmxqsRQDUoGl6SlkA1JObGqxFANSgaXpKWQDUk5sarEUA1KBpekpZANSTmxqsRQDUoGl6SlkA1JObGqxFANSgaXpKWQDUk5sarEUA1KBpekpZANSTmxqsRQDUoGl6SlkA1JObGqxFANSgaXpKWQDUk5sarEUA1KBpekpZANSTmxqsRQDUoGl6Svl/jqMj5BtZ8mEAAAAASUVORK5CYII=a minimal implementation of the original Eliza chatbot by Joe Weizenbaum. transcribed from David Johnson-Davies' awesome LISP blog, source: http://lisp.plasticki.com/list?24NX http://lisp.plasticki.com/show?24GC what I love about this implementation besides its terseness is that it doesn't rely on Regex but instead implements fuzzy pattern matching itself in a set of beautifully simple and elegant functions.

just use FIND or INDEX, right?

aa11

keyvaluesnewkey11values1new1BIND could and should probably just be a command block

world

this is fine

this is finedata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAeAAAAFoCAYAAACPNyggAAAAAXNSR0IArs4c6QAADoVJREFUeF7t1cEJAAAIxDDdf2m3sJ+4wEEQuuMIECBAgACBd4F9XzRIgAABAgQIjAB7AgIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECAiwHyBAgAABAoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQICLAfIECAAAECgYAAB+gmCRAgQICAAPsBAgQIECAQCAhwgG6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECByxcQFpoRMBzwAAAABJRU5ErkJggg==bye.2I,youyou,Ime,youam,arewas,weremy,youryx* x hello * y,hello. how can I help ?* x i want * y,what would it mean if you got y ?,why do you want y ?* x i wish * y,why would it be better if y ?* x i hate * y,what makes you hate y ?* x if * y,do you really think it is likely that y,what do you think about y* x no * y,why not?* x i was * y,why do you say x you were y ?* x i feel * y,do you often feel y ?* x i felt * y,what other feelings do you have?* x,you say x ?,tell me more.