14 lines
342 B
PHP
14 lines
342 B
PHP
$compose = function ($f, $g) {
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return function ($x) use ($f, $g) {
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return $f($g($x));
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};
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};
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$fn = array('sin', 'cos', function ($x) { return pow($x, 3); });
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$inv = array('asin', 'acos', function ($x) { return pow($x, 1/3); });
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for ($i = 0; $i < 3; $i++) {
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$f = $compose($inv[$i], $fn[$i]);
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echo $f(0.5), PHP_EOL;
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}
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