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sqrt.golden
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executable file
·8929 lines (8929 loc) · 193 KB
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"code": "# Calculating square roots by Newton's method, inspired by SICP\n# http://mitpress.mit.edu/sicp/full-text/book/book-Z-H-10.html#%_sec_1.1.7\n\ndef sqrt(x):\n def average(a, b):\n return (a + b) / 2.0\n\n def is_good_enough(guess):\n return (abs((guess * guess) - x) < 0.001)\n\n def improve(guess):\n return average(guess, x / guess)\n\n def sqrt_iter(guess):\n if is_good_enough(guess):\n return guess\n else:\n return sqrt_iter(improve(guess))\n\n return sqrt_iter(1.0)\n\n\nans = sqrt(9)\n",
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