Presentation of the Duplicate Code Detection Technology preview. Duplicate Code is a poor, but common, practice in software design where a similar/ identical set of instructions exists in several parts of the software source code. Duplicate Code Detection (DCD) helps to automatically discover the duplicate code from a large selection of source code so that redundancies are appropriately flagged, justified, or eliminated. DCD provides means for software developers to identify such redundancies, with the short-term goal of assessing the code quality of a large program, and ultimately the goal of refactoring the code. This is very applicable in the context of mainframe COBOL programming, where very large code databases (millions of code lines) have evolved over a period of time, and maintenance is becoming very demanding.

1. © 2016 IBM Corporation
April 2020
Duplicate Code
Detection
Tech Preview

2. Disclaimer
IBM’s statements regarding its plans, directions, and intent are subject to change or withdrawal without
notice and at IBM’s sole discretion. Information regarding potential future products is intended to outline
our general product direction and it should not be relied on in making a purchasing decision. The
information mentioned regarding potential future products is not a commitment, promise, or legal
obligation to deliver any material, code or functionality. Information about potential future products may
not be incorporated into any contract. The development, release, and timing of any future features or
functionality described for our products remains at our sole discretion. Performance is based on
measurements and projections using standard IBM benchmarks in a controlled environment. The actual
throughput or performance that any user will experience will vary depending upon many factors, including
considerations such as the amount of multiprogramming in the user’s job stream, the I/O configuration, the
storage configuration, and the workload processed. Therefore, no assurance can be given that an individual
user will achieve results similar to those stated here.

3. Time has changed…
When daylight saving time change
happens…
… you pick up your clock/watch and
change the time, moving forward or
backward an hour.

4. Time needs change
But you have clocks in nearly every
rooms that needs to be changed…
It takes time for sure, but the good
news is that you know where your
clocks are.

5. What about your Information System?
What is the real cost of fixing a single defect?
And would you like to reduce that cost?...
What is the size of your code? millions LoC, more?...
How much code one of your developer can handle?...
How many duplication of code do you have in your IS?
Do you have any idea where is that code duplication & how much
do you have?
How many defects are duplicated in your code?

6. But where should I start? What do I need?
Need for
enterprise-grade
capabilities
Need for handle
large amount of
LoC
Need code
duplicates
discovery tooling
Need for
refactoring
capabilities
Need to leverage
developers
Need to empower
your development
teams
Need to assert
code quality
…
Ultimately, I need
to be efficient

7. IBM Duplicate Code Detection (DCD) At a Glance
ü Identifies code fragment duplicates
§ at speed (1/10 sec to search 100 KLoC)
ü Code refactoring w/out changing external behavior.
§ improved code readability,
§ reduced complexity,
§ rationalize source code.
ü Discovery from a large selection of source codes.
§ custom fragment length & search scope,
§ reliable searches.
ü Share duplicates with team members
§ search your SCM,
§ version & share search results.
Leverage enterprise
developers
Empower development
teams
§ IDz 14.2.2,
§ Analyze COBOL
code,
§ Search for local
duplicates.
§ WAS Liberty,
§ GitHub,
§ Search for remote
duplicates,
§ Share & version
results amongst
teams,
Tech
Preview

8. IBM Duplicate Code Detection (DCD) Ecosystem
Empower
developer
(IDz)
Team
development
(SCM)
DevOps
quality gates*
IS analysis
(ADDI)*
Clean &
refactor code
DCD
* not available with DCD tech preview
Fine search, filter & edit
duplicate code locally
Remote search for
duplicate code & share with
your team
Ensure duplicate code gets
identified in your CI/CD
pipeline
Identify at large code
duplicates in your IS
Reduce LoC, ensure code
quality & readability

9. IBM Duplicate Code Detection (DCD) Highlight (1/2)
2. Duplicate search results
1. Search code duplicates
3. Filter results

10. IBM Duplicate Code Detection (DCD) Highlight (2/2)
5. Code duplicate details
4. Open duplicate details
6. Refactor code

11. IBM Duplicate Code Detection (DCD) Resources
• DCD Tech preview Website
• DCD Blog
• Submit future thoughts or vote on our priorities Here
• Video Demo : Here
• Support and help : Reach out to us

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