README

提供创建回调的简短且简单方式的库。

函数式编程是一个非常强大的概念，我很喜欢在我的工作中使用这种范式。然而，当前的PHP闭包语法相当冗长。请查看以下示例

/** filter books written by $author */
$books = array_filter($allBooks, function($book) use ($author) {
    return $book->getAuthor() === $author;
});

与

use EasyCallback\f;

/** filter books written by $author */
$books = array_filter($allBooks, f()->getAuthor()->ecEq($author));

文档/示例

库始终在EasyCallback\Wrapper类的实例上工作（此库中的所有函数都返回EasyCallback\Wrapper的实例）。

use EasyCallback\f;

f(); //Callable returning first parameter. Equivalent to:
function ($p1) {return $p1;};
f(2); //Callable returning 2-nd parameter. Equivalent to:
function ($p1, $p2) {return $p2;};
f($value, true); //Callable returning $value. Equivalent to
function () use ($value) {return $value;};

//EasyCallback\Wrapper support array syntax:
$f['a']; // Equivalent to:
function(...$params) use ($f) {return $f(...$params)['a'];}

f()['a']; //Equivalent to:
function($p1) {return $p1['a'];};
f(2)['a']; //Equivalent to:
function($p1, $p2) {return $p2['a'];};
f()['a']['b']; //Equivalent to:
function($p1) {return $p1['a']['b'];};
f($value, true)['a']; //Equivalent to:
function() use ($value) {return $value['a'];};
f($value, true)[f()]; //Equivalent to:
function($p1) use ($value) {return $value[$p1];};

//Similarly get property syntax and method call syntax is supported:
f()->exampleProperty; //Equivalent to:
function($p1) {return $p1->exampleProperty;};
f()->exampleMethod(1); //Equivalent to:
function($p1) {return $p1->exampleMethod(1);};
f()->exampleMethod1()->exampleMethod2(); //Equivalent to:
function($p1) {return $p1->exampleMethod1()->exampleMethod2();};