What%20Makes%20a%20Professional%20Programmer?

1
What Makes a Professional Programmer?

• Adair Dingle
• CSSE Dept
• Seattle University
• dingle_at_seattleu.edu

2
Themes

• Common Learning Obstacles
• DOCUMENTATION
• Bounds
• Memory Management
• Consistency in Design
• Personal Characteristics
• Successful Training

3
Classic Curriculum

• Introduction to Programming
• Data Structures
• Algorithms
• Computer Architecture
• Operating Systems
• Automata
• Programming Languages

4
Common Curriculum

• Introduction to Programming
• ( Data Structures )
• Algorithms
• ( Computer Architecture )
• Database
• Software Design
• Software Engineering

5
Overflow

• x
• myClassStatic
• (lo hi)/2 // binary search
• lo (hi-lo)/2
• Arrayindex
• Arrayindex
• Arrayindex

6
Binding

• Base myObject
• Base basePtr
• basePtr GetObject()
• basePtr-gtrunTbound()
• myObject.runTbound()
• basePtr-gtcompileTbound()

7
Conceptual OverlapBinding Accessibility

• Base basePtr GetObject()
• basePtr-gtvfunc()
• // vfunc public in Base
• // vfunc private in Derived
• // behavior understood
• // IF process understood
• // explain vtab

8
Memory Management

• Low-level perspective
• Every new has a matching delete
• Issue of ownership neglected
• Aliases!!
• MM cannot be done correctly so we need to use a
  garbage collector (Java)
• Garbage collection solves all problems

9
Ownership Transfer

• //assumption constructor
• myClass(yourClass s)
• myHandle s
• s 0

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Ownership Transfer

• // caller must assume responsibility
• MyClass localFn(MyClass ptr)
• MyClass heapPtr new MyClass
• ptr heapPtr
• return ptr

11
Ownership Transfer

• // indirect handle obscures error
• MyClass localFn(MyClass ptr)
• MyClass localObject
• ptr localObject
• return ptr

12
Aliases

• int MyClasssubvert()
• return privateHandle
• int alias array10
• int DB10
• int ptr DB9
• ptr

13

• class Fixed public Base
• // handle can be zeroed out
• // array of Base objects
• // address of Base descendant
• class Flow
• Base handle

14
Composition versus Inheritance

• Interface
• Language Support
• Overhead
• Flexibility
• Polymorphic subobject
• Cardinality
• Ownership
• Impact on extensibility

15
Interface/Expectations

• (x lt y)
• (y gt x)
• x.operatorlt(y)
• y.operatorgt(x)
• (x lt y)
• !(x gt y)

16
Personal Characteristics

• Love of Learning
• Constant self-education
• Curious how do things work?
• Reflective identify patterns
• Analytical
• Egalitarian
• No silver bullet
• Not wedded to single language, tool, platform

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Personal Characteristics

• Independent
• Compile, run, test play
• Seek answers online, references, samples
• Collaborative
• ASKs for HELP when necessary
• helps others without rancor
• BALANCE
• Not always a lone ranger
• Not a pest

18
Plugs

• Senior Capstone Project (Seattle University
  Project Center)
• Sponsored by industry
• real work
• Literature with Analysis
• C Memory First (Dingle Hildebrandt, 2006)
• Study beyond syntax
• K-12 math (analytical skills)
• www.wheresTheMath.com

19
Thanks to

• Roger Ball, manager Zilog
• Robert Field, software consultant
• Thomas Hildebrandt, software consultant