Yves Caseau's presentation discusses the evolving landscape of programming in the 21st century, emphasizing the need for elegant code that is adaptable to constant change. He advocates for collaborative software development, user experience design, and continuous learning through community engagement and feedback. The conclusion stresses the importance of breaking down barriers in coding practices to embrace agile methodologies.

1. Yves Caseau - The Joy of Programming – June 2018 1/9
// finds a cell with a min count (heuristic)
findPivot(g:Grid) : any
-> let minv := 10, cmin := unknown in
(for c in g.cells
(if (c.value = 0 & c.count < minv)
(minv := c.count, cmin := c)),
cmin)
// solves a sudoku : branch on possible
// values using a recursive function
// branch(...) does all the work :)
solve(g:Grid) : boolean
-> when c := findPivot(g) in
exists(v in (1 .. 9) |
(if c.possible[v]
branch((c.value := v,
solve(g)))
else false))
else true
// first propagation rule
r1() :: rule( c.value := v =>
(store(c.line.counts,v,0),
store(c.column.counts,v,0),
store(c.square.counts,v,0),
for v2 in (1 .. 9)
(if (v != v2 & c.possible[v2]) noLonger(c,v2),
for c2 in (c.line.cells but c) forbid(c2,v),
for c2 in (c.column.cells but c) forbid(c2,v),
for c2 in (c.square.cells but c) forbid(c2,v))))
// if c.count = 1, the only possible value is certain
r2() :: rule( c.count := y & y = 1 =>
c.value := some(y in (1 .. 9) | c.possible[y]))
// if a value v is possible only in one cell, it is certain
r3() :: rule( updateCount(cs,v) & cs.counts[v] <= 1
=> when c := some(c in cs.cells |
c.value = 0 & c.possible[v]) in
c.value := v
else contradiction!())
Yves Caseau
Michelin Group CIO
NATF (National Academy of Technologies of France)
Thinking, Designing, Writing,Thinking, Designing, Writing,
Testing … and Living with Code:Testing … and Living with Code:
Software in the 21Software in the 21stst
centurycenturyYves Caseau
Group CIO, Michelin
NATF
ADN Meetup, Le Crest
June 28th
, 2018 (v0.5)

2. Yves Caseau - The Joy of Programming – June 2018 2/9
The Need for Elegant ProgrammingThe Need for Elegant Programming
Constant change : love your code 
 Constant change & constant training
Refactoring : your code is a garden !

3. Yves Caseau - The Joy of Programming – June 2018 3/9
Software Development is a Team SportSoftware Development is a Team Sport
The world moves too fast to stay alone
 Build up your community
 Share your code to hire extra eye balls

4. Yves Caseau - The Joy of Programming – June 2018 4/9
Software is about Experience, not FunctionsSoftware is about Experience, not Functions
 User Experience Design is critical
 Cross-functional squads required
 Polyvalence makes collaboration easier

5. Yves Caseau - The Joy of Programming – June 2018 5/9
Always Ask for Help !Always Ask for Help !
In the 21st
century, to code starts with search
 Get in touch with your community for regular training
Leverage the power of MOOCs – Be curious !

6. Yves Caseau - The Joy of Programming – June 2018 6/9
Thinking and Doing in a Constant Learning LoopThinking and Doing in a Constant Learning Loop
 Analysts and Developers : 20th
century concepts 
 From mechanical design to organic growth
 Real-life operability issues makes delightful math problems

7. Yves Caseau - The Joy of Programming – June 2018 7/9
Good Software is Grown From Quantified FeedbackGood Software is Grown From Quantified Feedback
 Listen constantly to your users 
 Learn from measures – grow from your mistakes
 There is no user satisfaction without fast response time

8. Yves Caseau - The Joy of Programming – June 2018 8/9
Remember that You Belong to an EcosystemRemember that You Belong to an Ecosystem
 Your app is not isolated – recognize the system you are in
 Your users are not isolated – recognize the flows
 Don’t aim to be a “solution consultant” – be a magician !

9. Yves Caseau - The Joy of Programming – June 2018 9/9
ConclusionConclusion
Thank you for inviting me 
There has never been a better time
to write code 
Don’t build walls around yourselves 
 Let’s complete the Lean & Agile deployment

10. Yves Caseau - The Joy of Programming – June 2018 9/9
ConclusionConclusion
Thank you for inviting me 
There has never been a better time
to write code 
Don’t build walls around yourselves 
 Let’s complete the Lean & Agile deployment