TY  - JOUR
A1  - Hirschfeld, Robert
A1  - Steinert, Bastian
A1  - Lincke, Jens
T1  - Agile software development in virtual collaboration environments
Y1  - 2011
SN  - 978-3-642-13756-3
ER  - 
TY  - JOUR
A1  - Steinert, Bastian
A1  - Hirschfeld, Robert
T1  - Applying design knowledge to programming
Y1  - 2012
ER  - 
TY  - JOUR
A1  - Steinert, Bastian
A1  - Cassou, Damien
A1  - Hirschfeld, Robert
T1  - CoExist overcoming aversion to change preserving immediate access to source code and run-time information of previous development states
JF  - ACM SIGPLAN notices
N2  - Programmers make many changes to the program to eventually find a good solution for a given task. In this course of change, every intermediate development state can of value, when, for example, a promising ideas suddenly turn out inappropriate or the interplay of objects turns out more complex than initially expected before making changes. Programmers would benefit from tool support that provides immediate access to source code and run-time of previous development states of interest. We present IDE extensions, implemented for Squeak/Smalltalk, to preserve, retrieve, and work with this information. With such tool support, programmers can work without worries because they can rely on tools that help them with whatever their explorations will reveal. They no longer have to follow certain best practices only to avoid undesired consequences of changing code.
KW  - Design
KW  - Experimentation
KW  - Human Factors
KW  - Continuous Testing
KW  - Continuous Versioning
KW  - Debugging
KW  - Evolution
KW  - Explore-first Programming
KW  - Fault Localization
KW  - Prototyping
Y1  - 2013
U6  - https://doi.org/10.1145/2480360.2384591
SN  - 0362-1340
VL  - 48
IS  - 2
SP  - 107
EP  - 117
PB  - Association for Computing Machinery
CY  - New York
ER  - 
TY  - JOUR
A1  - Weiher, Marcel
A1  - Hirschfeld, Robert
T1  - Polymorphic identifiers: uniform resource access in objective-smalltalk
JF  - ACM SIGPLAN notices
N2  - In object-oriented programming, polymorphic dispatch of operations decouples clients from specific providers of services and allows implementations to be modified or substituted without affecting clients.
 The Uniform Access Principle (UAP) tries to extend these qualities to resource access by demanding that access to state be indistinguishable from access to operations. Despite language features supporting the UAP, the overall goal of substitutability has not been achieved for either alternative resources such as keyed storage, files or web pages, or for alternate access mechanisms: specific kinds of resources are bound to specific access mechanisms and vice versa. Changing storage or access patterns either requires changes to both clients and service providers and trying to maintain the UAP imposes significant penalties in terms of code-duplication and/or performance overhead.
 We propose introducing first class identifiers as polymorphic names for storage locations to solve these problems. With these Polymorphic Identifiers, we show that we can provide uniform access to a wide variety of resource types as well as storage and access mechanisms, whether parametrized or direct, without affecting client code, without causing code duplication or significant performance penalties.
KW  - Identifiers
KW  - REST
KW  - Uniform Access Principle
KW  - Extensibility
Y1  - 2014
U6  - https://doi.org/10.1145/2508168.2508169
SN  - 0362-1340
SN  - 1558-1160
VL  - 49
IS  - 2
SP  - 61
EP  - 71
PB  - Association for Computing Machinery
CY  - New York
ER  -