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added bentley's chapter from beautiful code to the examples/tests -- quicksort runtime analysis

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This commit is contained in:
Jeremy Ashkenas 2010-01-17 15:58:44 -05:00
parent 4609ad78c2
commit 4a32c58221
2 changed files with 15 additions and 2 deletions
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13
examples/beautiful_code/quicksort.coffee Normal file
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# Beautiful Code, Chapter 3.
# Produces the expected runtime of Quicksort, for every integer from 1 to N.
runtime: N =>
[sum, t]: [0, 0]
for n in [1..N]
sum += 2 * t
t: n - 1 + sum / n
t
print(runtime(3) is 2.6666666666666665)
print(runtime(5) is 7.4)
print(runtime(8) is 16.92142857142857)

4
examples/beautiful_code/regular_expression_matcher.coffee
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# Beautiful Code, chapter 1.
# Implements a regular expression matcher that supports characters,
# Beautiful Code, Chapter 1.
# Implements a regular expression matcher that supports character matches,
# '.', '^', '$', and '*'.
# Search for the regexp anywhere in the text.