_functions.php ➔ _merge_args() - Code Metrics - Inspection of "Rewritten most of the functions to made them more..." - tarsana/functional - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#3)

by Amine

created 2017-01-05 15:54 UTC

_functions.php ➔ _merge_args() D

↳ Parent: Project

Complexity

Conditions	9
Paths	14

Size

Total Lines	30
Code Lines	23

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	9
eloc	23
nc	14
nop	3
dl	0
loc	30
rs	4.909
c	0
b	0
f	0

<?php namespace Tarsana\Functional;
/**
 * This file contains common internal functions.
 * Caution: Code written here may seems stupid because it
 * contains a lot of duplications and low level optimisation,
 * but this is needed to make the library as efficient as possible.
 * @file
 */

/**
 * Adds the `Tarsana\Functional` namespace to a function name.
 * This is useful to pass non-curried functions as parameter.
 * ```php
 * F\_f('foo'); //=> 'Tarsana\Functional\foo'
 * ```
 *
 * @signature String -> Sring
 * @param  string $name
 * @return string
 */
function _f($name) {
    $name = "Tarsana\\Functional\\{$name}";
    return $name;
}

/**
 * Gets the number of arguments of a function.
 * ```php
 * F\_number_of_args(function($x, $y){}); //=> 2
 * ```
 *
 * @signature (* -> *) -> Number
 * @param  callable $fn
 * @return int
 */
function _number_of_args($fn) {
    $reflector = is_array($fn) ?
        new \ReflectionMethod($fn[0], $fn[1]) :
        new \ReflectionFunction($fn);
    return $reflector->getNumberOfRequiredParameters();
}

/**
 * Non curried version of apply for internal use.
 *
 * ```php
 * $sum = function() {
 *     return F\sum(func_get_args());
 * };
 * F\_apply($sum, [1, 2, 3, 4, 5]); //=> 15
 * F\_apply($sum, [1, 2, 3, 4, 5, 6]); //=> 21
 * ```
 *
 * @param  callable $fn
 * @param  array    $args
 * @return mixed
 */
function _apply($fn, $args) {
    switch (count($args)) {
        case 0: return $fn();
switch ($expr) {
case "A":
    doSomething(); //right
    break;
case "B":

    doSomethingElse(); //wrong
    break;
        case 1: return $fn($args[0]);
switch ($expr) {
case "A":
    doSomething(); //right
    break;
case "B":

    doSomethingElse(); //wrong
    break;
        case 2: return $fn($args[0], $args[1]);
switch ($expr) {
case "A":
    doSomething(); //right
    break;
case "B":

    doSomethingElse(); //wrong
    break;
        case 3: return $fn($args[0], $args[1], $args[2]);
switch ($expr) {
case "A":
    doSomething(); //right
    break;
case "B":

    doSomethingElse(); //wrong
    break;
        case 4: return $fn($args[0], $args[1], $args[2], $args[3]);
switch ($expr) {
case "A":
    doSomething(); //right
    break;
case "B":

    doSomethingElse(); //wrong
    break;
        case 5: return $fn($args[0], $args[1], $args[2], $args[3], $args[4]);
switch ($expr) {
case "A":
    doSomething(); //right
    break;
case "B":

    doSomethingElse(); //wrong
    break;
    }
    return call_user_func_array($fn, $args);
}

/**
 * Checks if `$a` is an argument placeholder.
 * ```php
 * F\_is_placeholder(F\__()); //=> true
 * F\_is_placeholder('other thing'); //=> false
 * ```
 *
 * @signature * -> Boolean
 * @param  mixed  $a
 * @return boolean
 */
function _is_placeholder($a) {
    return $a instanceof Placeholder;
}

/**
 * Curry an unary function.
 *
 * @ignore
 * @signature (a -> b) -> (a -> b)
 * @param  callable $fn
 * @return callable
 */
function _curry_one($fn) {
    return function() use($fn) {
        $args = func_get_args();
        return (count($args) > 0 && ! _is_placeholder($args[0]))
            ? $fn($args[0])
            : _curry_one($fn);
    };
}

/**
 * Curry an binary function.
 *
 * ```php
 * $add = F\_curry_two(function($x, $y) {
 *     return $x + $y;
 * });
 *
 * $addOne = $add(1, F\__());
 * $addOne(2); //=> 3
 * ```
 *
 * @signature (a,b -> c) -> (a -> b -> c)
 * @param  callable $fn
 * @return callable
 */
function _curry_two($fn) {
    return function() use($fn) {
        $args = func_get_args();
        $n = count($args);
        while ($n > 0 && _is_placeholder($args[$n - 1]))
            $n --;
        if ($n == 0)
            return _curry_two($fn);
        if ($n == 1) {
            $a = &$args[0];
            if (_is_placeholder($a))
                return _curry_two($fn);
            return _curry_one(function($b) use($fn, &$a) {
                return $fn($a, $b);
            });
        }
        $a = &$args[0];
        $b = &$args[1];
        if (_is_placeholder($a) && _is_placeholder($b))
            return _curry_two($fn);
        if (_is_placeholder($a))
            return _curry_one(function($_a) use($fn, &$b) {
                return $fn($_a, $b);
            });
        return $fn($args[0], $args[1]);
    };
}

/**
 * Curry a function with 3 arguments.
 *
 * ```php
 * $add = F\_curry_three(function($x, $y, $z) {
 *     return $x + $y + $z;
 * });
 *
 * $add(1, 2, 3); //=> 6
 * $f = $add(F\__(), 2, F\__());
 * $f(1, 3); //=> 6
 * $g = $add(1, F\__(), 3);
 * $g(2); //=> 6
 * $h = $add(F\__(), F\__(), 3);
 * $h(1, 2); //=> 6
 * ```
 *
 * @signature (a,b,c -> d) -> (a -> b -> c -> d)
 * @param  callable $fn
 * @return callable
 */
function _curry_three($fn) {
    return function() use($fn) {
        $args = func_get_args();
        $n = count($args);
        while ($n > 0 && _is_placeholder($args[$n - 1]))
            $n --;
        if ($n == 0)
            return _curry_three($fn);
        if ($n == 1) {
            $a = &$args[0];
            return _curry_two(function($b, $c) use($fn, &$a) {
                return $fn($a, $b, $c);
            });
        }
        if ($n == 2) {
            $a = &$args[0]; $b = &$args[1];

            if (_is_placeholder($a))
                return _curry_two(function($_a, $c) use($fn, &$b) {
                    return $fn($_a, $b, $c);
                });
            return _curry_one(function($c) use($fn, &$a, &$b) {
                return $fn($a, $b, $c);
            });
        }

        $a = &$args[0]; $b = &$args[1]; $c = &$args[2];

        if (_is_placeholder($a) && _is_placeholder($b))

            return _curry_two(function($_a, $_b) use($fn, &$c) {
                return $fn($_a, $_b, $c);
            });
        if (_is_placeholder($a))

            return _curry_one(function($_a) use($fn, &$b, &$c) {
                return $fn($_a, $b, $c);
            });
        if (_is_placeholder($b))

            return _curry_one(function($_b) use($fn, &$a, &$c) {
                return $fn($a, $_b, $c);
            });

        return $fn($a, $b, $c);
    };
}

/**
 * Curry a function with `$n` arguments.
 *
 * ```php
 * $polynomial = F\_curry_n(function($a, $b, $c, $x) {
 *     return $a * $x * $x + $b * $x + $c;
 * }, 4);
 *
 * $linear = $polynomial(0);
 * $linear(2, 1, 5); //=> 11
 * ```
 *
 * @signature (*... -> *) -> Number -> (* -> ... -> *)
 * @param  callable $fn
 * @param  int $n
 * @param  array $given
 * @return callable
 */
function _curry_n($fn, $n, $given = []) {
    return function() use($fn, $n, $given) {
        $args = func_get_args();
        $merged = _merge_args($given, $args, $n);
        $args = $merged->args;
        switch ($merged->placeholders) {
            case 0: return _apply($fn, $args);
switch ($expr) {
case "A":
    doSomething(); //right
    break;
case "B":

    doSomethingElse(); //wrong
    break;
            case 1:
                return _curry_one(function($a) use($fn, &$args) {
                    return _apply($fn, _fill_placeholders($args, [$a]));
                });
            case 2:
                return _curry_two(function($a, $b) use($fn, &$args) {
                    return _apply($fn, _fill_placeholders($args, [$a, $b]));
                });
            case 3:
                return _curry_three(function($a, $b, $c) use($fn, &$args) {
                    return _apply($fn, _fill_placeholders($args, [$a, $b, $c]));
                });
        }
        return _curry_n($fn, $n, $args);
    };
}

/**
 * Merges already given with new arguments, filling placeholders in the process.
 * Returns an object holding the resulting args and the number of placeholders left.
 *
 * ```php
 * $given = [F\__(), 2];
 * $args = [1, 3];
 * $newArgs = F\_merge_args($given, $args, 4);
 * $newArgs; //=> (object) ['args' => [1, 2, 3, F\__()], 'placeholders' => 1]
 * ```
 *
 * @param  array &$given
 * @param  array &$args
 * @param  int $n
 * @return object
 */
function _merge_args(&$given, &$args, $n) {
    $merged = (object) [
        'args' => [],
        'placeholders' => 0
    ];
    $givenIndex = 0; $argsIndex = 0; $mergedIndex = 0;
    $givenCount = count($given); $argsCount = count($args);
    while ($mergedIndex < $n && ($givenIndex < $givenCount || $argsIndex < $argsCount)) {
        if ($givenIndex < $givenCount && !_is_placeholder($given[$givenIndex])) {
            $merged->args[$mergedIndex] = $given[$givenIndex];
        } else if ($argsIndex < $argsCount) {
            $merged->args[$mergedIndex] = $args[$argsIndex];
            $argsIndex ++;
        } else {
            $merged->args[$mergedIndex] = $given[$givenIndex];
        }

        if (_is_placeholder($merged->args[$mergedIndex]))
            $merged->placeholders ++;

        $givenIndex ++;
        $mergedIndex ++;
    }
    while ($mergedIndex < $n) {
        $merged->args[$mergedIndex] = Placeholder::get();
        $mergedIndex ++;
        $merged->placeholders ++;
    }
    return $merged;
}

function _fill_placeholders($args, $fillers) {
    $argsIndex = 0; $fillersIndex = 0;
    $argsCount = count($args);
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
    $fillersCount = count($fillers);
    while ($fillersIndex < $fillersCount) {
        while (!_is_placeholder($args[$argsIndex]))
            $argsIndex ++;
        $args[$argsIndex] = $fillers[$fillersIndex];
        $fillersIndex ++;
    }
    return $args;
}


1		<?php namespace Tarsana\Functional;
2		/**
3		* This file contains common internal functions.
4		* Caution: Code written here may seems stupid because it
5		* contains a lot of duplications and low level optimisation,
6		* but this is needed to make the library as efficient as possible.
7		* @file
8		*/
9
10		/**
11		* Adds the `Tarsana\Functional` namespace to a function name.
12		* This is useful to pass non-curried functions as parameter.
13		* ```php
14		* F\_f('foo'); //=> 'Tarsana\Functional\foo'
15		* ```
16		*
17		* @signature String -> Sring
18		* @param string $name
19		* @return string
20		*/
21		function _f($name) {
22		$name = "Tarsana\\Functional\\{$name}";
23		return $name;
24		}
25
26		/**
27		* Gets the number of arguments of a function.
28		* ```php
29		* F\_number_of_args(function($x, $y){}); //=> 2
30		* ```
31		*
32		* @signature (* -> *) -> Number
33		* @param callable $fn
34		* @return int
35		*/
36		function _number_of_args($fn) {
37		$reflector = is_array($fn) ?
38		new \ReflectionMethod($fn[0], $fn[1]) :
39		new \ReflectionFunction($fn);
40		return $reflector->getNumberOfRequiredParameters();
41		}
42
43		/**
44		* Non curried version of apply for internal use.
45		*
46		* ```php
47		* $sum = function() {
48		* return F\sum(func_get_args());
49		* };
50		* F\_apply($sum, [1, 2, 3, 4, 5]); //=> 15
51		* F\_apply($sum, [1, 2, 3, 4, 5, 6]); //=> 21
52		* ```
53		*
54		* @param callable $fn
55		* @param array $args
56		* @return mixed
57		*/
58		function _apply($fn, $args) {
59		switch (count($args)) {
60		case 0: return $fn();
		0 ignored issues – show Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report The case body in a switch statement must start on the line following the statement. According to the PSR-2, the body of a case statement must start on the line immediately following the case statement. switch ($expr) { case "A": doSomething(); //right break; case "B": doSomethingElse(); //wrong break; } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history... Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report Terminating statement must be on a line by itself As per the PSR-2 coding standard, the `break` (or other terminating) statement must be on a line of its own. switch ($expr) { case "A": doSomething(); break; //wrong case "B": doSomething(); break; //right case "C:": doSomething(); return true; //right } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history...
61		case 1: return $fn($args[0]);
		0 ignored issues – show Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report The case body in a switch statement must start on the line following the statement. According to the PSR-2, the body of a case statement must start on the line immediately following the case statement. switch ($expr) { case "A": doSomething(); //right break; case "B": doSomethingElse(); //wrong break; } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history... Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report Terminating statement must be on a line by itself As per the PSR-2 coding standard, the `break` (or other terminating) statement must be on a line of its own. switch ($expr) { case "A": doSomething(); break; //wrong case "B": doSomething(); break; //right case "C:": doSomething(); return true; //right } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history...
62		case 2: return $fn($args[0], $args[1]);
		0 ignored issues – show Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report The case body in a switch statement must start on the line following the statement. According to the PSR-2, the body of a case statement must start on the line immediately following the case statement. switch ($expr) { case "A": doSomething(); //right break; case "B": doSomethingElse(); //wrong break; } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history... Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report Terminating statement must be on a line by itself As per the PSR-2 coding standard, the `break` (or other terminating) statement must be on a line of its own. switch ($expr) { case "A": doSomething(); break; //wrong case "B": doSomething(); break; //right case "C:": doSomething(); return true; //right } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history...
63		case 3: return $fn($args[0], $args[1], $args[2]);
		0 ignored issues – show Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report The case body in a switch statement must start on the line following the statement. According to the PSR-2, the body of a case statement must start on the line immediately following the case statement. switch ($expr) { case "A": doSomething(); //right break; case "B": doSomethingElse(); //wrong break; } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history... Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report Terminating statement must be on a line by itself As per the PSR-2 coding standard, the `break` (or other terminating) statement must be on a line of its own. switch ($expr) { case "A": doSomething(); break; //wrong case "B": doSomething(); break; //right case "C:": doSomething(); return true; //right } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history...
64	View Code Duplication	case 4: return $fn($args[0], $args[1], $args[2], $args[3]);
		0 ignored issues – show Duplication introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history... Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report The case body in a switch statement must start on the line following the statement. According to the PSR-2, the body of a case statement must start on the line immediately following the case statement. switch ($expr) { case "A": doSomething(); //right break; case "B": doSomethingElse(); //wrong break; } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history... Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report Terminating statement must be on a line by itself As per the PSR-2 coding standard, the `break` (or other terminating) statement must be on a line of its own. switch ($expr) { case "A": doSomething(); break; //wrong case "B": doSomething(); break; //right case "C:": doSomething(); return true; //right } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history...
65	View Code Duplication	case 5: return $fn($args[0], $args[1], $args[2], $args[3], $args[4]);
		0 ignored issues – show Duplication introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history... Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report The case body in a switch statement must start on the line following the statement. According to the PSR-2, the body of a case statement must start on the line immediately following the case statement. switch ($expr) { case "A": doSomething(); //right break; case "B": doSomethingElse(); //wrong break; } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history... Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report Terminating statement must be on a line by itself As per the PSR-2 coding standard, the `break` (or other terminating) statement must be on a line of its own. switch ($expr) { case "A": doSomething(); break; //wrong case "B": doSomething(); break; //right case "C:": doSomething(); return true; //right } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history...
66		}
67		return call_user_func_array($fn, $args);
68		}
69
70		/**
71		* Checks if `$a` is an argument placeholder.
72		* ```php
73		* F\_is_placeholder(F\__()); //=> true
74		* F\_is_placeholder('other thing'); //=> false
75		* ```
76		*
77		* @signature * -> Boolean
78		* @param mixed $a
79		* @return boolean
80		*/
81		function _is_placeholder($a) {
82		return $a instanceof Placeholder;
83		}
84
85		/**
86		* Curry an unary function.
87		*
88		* @ignore
89		* @signature (a -> b) -> (a -> b)
90		* @param callable $fn
91		* @return callable
92		*/
93		function _curry_one($fn) {
94		return function() use($fn) {
95		$args = func_get_args();
96		return (count($args) > 0 && ! _is_placeholder($args[0]))
97		? $fn($args[0])
98		: _curry_one($fn);
99		};
100		}
101
102		/**
103		* Curry an binary function.
104		*
105		* ```php
106		* $add = F\_curry_two(function($x, $y) {
107		* return $x + $y;
108		* });
109		*
110		* $addOne = $add(1, F\__());
111		* $addOne(2); //=> 3
112		* ```
113		*
114		* @signature (a,b -> c) -> (a -> b -> c)
115		* @param callable $fn
116		* @return callable
117		*/
118		function _curry_two($fn) {
119		return function() use($fn) {
120		$args = func_get_args();
121		$n = count($args);
122		while ($n > 0 && _is_placeholder($args[$n - 1]))
123		$n --;
124		if ($n == 0)
125		return _curry_two($fn);
126		if ($n == 1) {
127		$a = &$args[0];
128		if (_is_placeholder($a))
129		return _curry_two($fn);
130		return _curry_one(function($b) use($fn, &$a) {
131		return $fn($a, $b);
132		});
133		}
134		$a = &$args[0];
135		$b = &$args[1];
136		if (_is_placeholder($a) && _is_placeholder($b))
137		return _curry_two($fn);
138		if (_is_placeholder($a))
139		return _curry_one(function($_a) use($fn, &$b) {
140		return $fn($_a, $b);
141		});
142		return $fn($args[0], $args[1]);
143		};
144		}
145
146		/**
147		* Curry a function with 3 arguments.
148		*
149		* ```php
150		* $add = F\_curry_three(function($x, $y, $z) {
151		* return $x + $y + $z;
152		* });
153		*
154		* $add(1, 2, 3); //=> 6
155		* $f = $add(F\__(), 2, F\__());
156		* $f(1, 3); //=> 6
157		* $g = $add(1, F\__(), 3);
158		* $g(2); //=> 6
159		* $h = $add(F\__(), F\__(), 3);
160		* $h(1, 2); //=> 6
161		* ```
162		*
163		* @signature (a,b,c -> d) -> (a -> b -> c -> d)
164		* @param callable $fn
165		* @return callable
166		*/
167		function _curry_three($fn) {
168		return function() use($fn) {
169		$args = func_get_args();
170		$n = count($args);
171		while ($n > 0 && _is_placeholder($args[$n - 1]))
172		$n --;
173		if ($n == 0)
174		return _curry_three($fn);
175		if ($n == 1) {
176		$a = &$args[0];
177		return _curry_two(function($b, $c) use($fn, &$a) {
178		return $fn($a, $b, $c);
179		});
180		}
181		if ($n == 2) {
182		$a = &$args[0]; $b = &$args[1];
183
184		if (_is_placeholder($a))
185		return _curry_two(function($_a, $c) use($fn, &$b) {
186		return $fn($_a, $b, $c);
187		});
188		return _curry_one(function($c) use($fn, &$a, &$b) {
189		return $fn($a, $b, $c);
190		});
191		}
192
193		$a = &$args[0]; $b = &$args[1]; $c = &$args[2];
194
195	View Code Duplication	if (_is_placeholder($a) && _is_placeholder($b))
		0 ignored issues – show Duplication introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
196		return _curry_two(function($_a, $_b) use($fn, &$c) {
197		return $fn($_a, $_b, $c);
198		});
199	View Code Duplication	if (_is_placeholder($a))
		0 ignored issues – show Duplication introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
200		return _curry_one(function($_a) use($fn, &$b, &$c) {
201		return $fn($_a, $b, $c);
202		});
203	View Code Duplication	if (_is_placeholder($b))
		0 ignored issues – show Duplication introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
204		return _curry_one(function($_b) use($fn, &$a, &$c) {
205		return $fn($a, $_b, $c);
206		});
207
208		return $fn($a, $b, $c);
209		};
210		}
211
212		/**
213		* Curry a function with `$n` arguments.
214		*
215		* ```php
216		* $polynomial = F\_curry_n(function($a, $b, $c, $x) {
217		* return $a * $x * $x + $b * $x + $c;
218		* }, 4);
219		*
220		* $linear = $polynomial(0);
221		* $linear(2, 1, 5); //=> 11
222		* ```
223		*
224		* @signature (... -> ) -> Number -> (* -> ... -> *)
225		* @param callable $fn
226		* @param int $n
227		* @param array $given
228		* @return callable
229		*/
230		function _curry_n($fn, $n, $given = []) {
231		return function() use($fn, $n, $given) {
232		$args = func_get_args();
233		$merged = _merge_args($given, $args, $n);
234		$args = $merged->args;
235		switch ($merged->placeholders) {
236		case 0: return _apply($fn, $args);
		0 ignored issues – show Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report The case body in a switch statement must start on the line following the statement. According to the PSR-2, the body of a case statement must start on the line immediately following the case statement. switch ($expr) { case "A": doSomething(); //right break; case "B": doSomethingElse(); //wrong break; } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history... Coding Style introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report Terminating statement must be on a line by itself As per the PSR-2 coding standard, the `break` (or other terminating) statement must be on a line of its own. switch ($expr) { case "A": doSomething(); break; //wrong case "B": doSomething(); break; //right case "C:": doSomething(); return true; //right } To learn more about the PSR-2 coding standard, please refer to the PHP-Fig. Loading history...
237		case 1:
238		return _curry_one(function($a) use($fn, &$args) {
239		return _apply($fn, _fill_placeholders($args, [$a]));
240		});
241		case 2:
242		return _curry_two(function($a, $b) use($fn, &$args) {
243		return _apply($fn, _fill_placeholders($args, [$a, $b]));
244		});
245		case 3:
246		return _curry_three(function($a, $b, $c) use($fn, &$args) {
247		return _apply($fn, _fill_placeholders($args, [$a, $b, $c]));
248		});
249		}
250		return _curry_n($fn, $n, $args);
251		};
252		}
253
254		/**
255		* Merges already given with new arguments, filling placeholders in the process.
256		* Returns an object holding the resulting args and the number of placeholders left.
257		*
258		* ```php
259		* $given = [F\__(), 2];
260		* $args = [1, 3];
261		* $newArgs = F\_merge_args($given, $args, 4);
262		* $newArgs; //=> (object) ['args' => [1, 2, 3, F\__()], 'placeholders' => 1]
263		* ```
264		*
265		* @param array &$given
266		* @param array &$args
267		* @param int $n
268		* @return object
269		*/
270		function _merge_args(&$given, &$args, $n) {
271		$merged = (object) [
272		'args' => [],
273		'placeholders' => 0
274		];
275		$givenIndex = 0; $argsIndex = 0; $mergedIndex = 0;
276		$givenCount = count($given); $argsCount = count($args);
277		while ($mergedIndex < $n && ($givenIndex < $givenCount \|\| $argsIndex < $argsCount)) {
278		if ($givenIndex < $givenCount && !_is_placeholder($given[$givenIndex])) {
279		$merged->args[$mergedIndex] = $given[$givenIndex];
280		} else if ($argsIndex < $argsCount) {
281		$merged->args[$mergedIndex] = $args[$argsIndex];
282		$argsIndex ++;
283		} else {
284		$merged->args[$mergedIndex] = $given[$givenIndex];
285		}
286
287		if (_is_placeholder($merged->args[$mergedIndex]))
288		$merged->placeholders ++;
289
290		$givenIndex ++;
291		$mergedIndex ++;
292		}
293		while ($mergedIndex < $n) {
294		$merged->args[$mergedIndex] = Placeholder::get();
295		$mergedIndex ++;
296		$merged->placeholders ++;
297		}
298		return $merged;
299		}
300
301		function _fill_placeholders($args, $fillers) {
302		$argsIndex = 0; $fillersIndex = 0;
303		$argsCount = count($args);
		0 ignored issues – show Unused Code introduced 2017-01-05 11:06 UTC by Report Bug Copy Issue Report `$argsCount` is not used, you could remove the assignment. This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value'; $higher = false; if (rand(1, 6) > 3) { $higher = true; } else { $higher = false; } Both the `$myVar` assignment in line 1 and the `$higher` assignment in line 2 are dead. The first because `$myVar` is never used and the second because `$higher` is always overwritten for every possible time line. Loading history...
304		$fillersCount = count($fillers);
305		while ($fillersIndex < $fillersCount) {
306		while (!_is_placeholder($args[$argsIndex]))
307		$argsIndex ++;
308		$args[$argsIndex] = $fillers[$fillersIndex];
309		$fillersIndex ++;
310		}
311		return $args;
312		}
313

tarsana / functional

Pull Request — master (#3)

_functions.php ➔ _merge_args() D

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