Class 26 — October 23

What’s its function

Another haiku — Is needed for today’ class — Am I up for it

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Look both ways

• Back or ahead

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Agenda

• Problem solve

• Problem solving strategies

• Introduce pair-programming

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Paired programming

• Introductory video

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Top-down design and bottom-up implementation

• When confronted with a big problem try to decompose it into subproblems. If they are still big, repeat the process. Afterwards solve the smallest problems first and use them to help solve the bigger problems.

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Una problème de la journée

• Module polyglot.py

• Provides support for multi-line text translation using the Babel translation dictionary

• Tester — program use_polyglot.py

• Gets user text needing translation

• Tester — program cauldron.py

• Gets URL text needing translation

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Example

• Module take_two.py defines two functions

• Function signum( x )

• Function parameter x is a numeric value. The function returns integer -1, 0, or 1 depending respectively whether x is negative, zero, or positive. The function does not print any output.

• Function mid( s )

• If the length of string s is odd, the function returns the middle character of s; otherwise, the function returns the two middle characters of s. The function does not print any output.

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To do

• Look over artifacts

• Homework