TY  - JOUR
A1  - Freudenberg, Bert
A1  - Ingalls, Dan
A1  - Felgentreff, Tim
A1  - Pape, Tobias
A1  - Hirschfeld, Robert
T1  - SqueakJS A Modern and Practical Smalltalk that Runs in Any Browser
JF  - ACM SIGPLAN notices
N2  - We report our experience in implementing SqueakJS, a bitcompatible implementation of Squeak/Smalltalk written in pure JavaScript. SqueakJS runs entirely in theWeb browser with a virtual file system that can be directed to a server or client-side storage. Our implementation is notable for simplicity and performance gained through adaptation to the host object memory and deployment leverage gained through the Lively Web development environment. We present several novel techniques as well as performance measurements for the resulting virtual machine. Much of this experience is potentially relevant to preserving other dynamic language systems and making them available in a browser-based environment.
KW  - Smalltalk
KW  - Squeak
KW  - Web browsers
KW  - JavaScript
Y1  - 2015
U6  - https://doi.org/10.1145/10.1145/2661088.2661100
SN  - 0362-1340
SN  - 1558-1160
VL  - 50
IS  - 2
SP  - 57
EP  - 66
PB  - Association for Computing Machinery
CY  - New York
ER  - 
TY  - JOUR
A1  - Steinert, Bastian
A1  - Thamsen, Lauritz
A1  - Felgentreff, Tim
A1  - Hirschfeld, Robert
T1  - Object Versioning to Support Recovery Needs Using Proxies to Preserve Previous Development States in Lively
JF  - ACM SIGPLAN notices
N2  - We present object versioning as a generic approach to preserve access to previous development and application states. Version-aware references can manage the modifications made to the target object and record versions as desired. Such references can be provided without modifications to the virtual machine. We used proxies to implement the proposed concepts and demonstrate the Lively Kernel running on top of this object versioning layer. This enables Lively users to undo the effects of direct manipulation and other programming actions.
KW  - Programming Environments
KW  - Object Versioning
KW  - CoExist
KW  - JavaScript
KW  - Lively Kernel
Y1  - 2015
U6  - https://doi.org/10.1145/2661088.2661093
SN  - 0362-1340
SN  - 1558-1160
VL  - 50
IS  - 2
SP  - 113
EP  - 124
PB  - Association for Computing Machinery
CY  - New York
ER  -