zicht /
itertools
| @@ 17-28 (lines=12) @@ | ||
| 14 | * |
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| 15 | * @return \Closure |
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| 16 | */ |
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| 17 | public static function add() |
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| 18 | { |
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| 19 | return function ($a, $b) { |
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| 20 | if (!is_numeric($a)) { |
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| 21 | throw new \InvalidArgumentException(sprintf('Argument $A must be numeric to perform addition, not %s', is_object($a) ? get_class($a) : gettype($a))); |
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| 22 | } |
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| 23 | if (!is_numeric($b)) { |
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| 24 | throw new \InvalidArgumentException(sprintf('Argument $B must be numeric to perform addition, not %s', is_object($b) ? get_class($b) : gettype($b))); |
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| 25 | } |
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| 26 | return $a + $b; |
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| 27 | }; |
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| 28 | } |
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| 29 | ||
| 30 | /** |
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| 31 | * Returns a closure that subtracts one number from another |
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| @@ 35-46 (lines=12) @@ | ||
| 32 | * |
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| 33 | * @return \Closure |
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| 34 | */ |
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| 35 | public static function sub() |
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| 36 | { |
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| 37 | return function ($a, $b) { |
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| 38 | if (!is_numeric($a)) { |
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| 39 | throw new \InvalidArgumentException(sprintf('Argument $A must be numeric to perform subtraction, not %s', is_object($a) ? get_class($a) : gettype($a))); |
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| 40 | } |
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| 41 | if (!is_numeric($b)) { |
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| 42 | throw new \InvalidArgumentException(sprintf('Argument $B must be numeric to perform subtraction, not %s', is_object($b) ? get_class($b) : gettype($b))); |
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| 43 | } |
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| 44 | return $a - $b; |
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| 45 | }; |
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| 46 | } |
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| 47 | ||
| 48 | /** |
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| 49 | * Returns a closure that multiplies two numbers |
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| @@ 53-64 (lines=12) @@ | ||
| 50 | * |
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| 51 | * @return \Closure |
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| 52 | */ |
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| 53 | public static function mul() |
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| 54 | { |
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| 55 | return function ($a, $b) { |
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| 56 | if (!is_numeric($a)) { |
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| 57 | throw new \InvalidArgumentException(sprintf('Argument $A must be numeric to perform multiplication, not %s', is_object($a) ? get_class($a) : gettype($a))); |
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| 58 | } |
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| 59 | if (!is_numeric($b)) { |
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| 60 | throw new \InvalidArgumentException(sprintf('Argument $B must be numeric to perform multiplication, not %s', is_object($b) ? get_class($b) : gettype($b))); |
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| 61 | } |
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| 62 | return $a * $b; |
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| 63 | }; |
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| 64 | } |
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| 65 | ||
| 66 | /** |
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| 67 | * Returns a closure that returns the smallest of two numbers |
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