<?php
require_once __DIR__ . '/../autoload.php';
use const nspl\op\object;
use const nspl\op\gt;
use function nspl\op\itemGetter;
use function nspl\op\propertyGetter;
use function nspl\f\map;
use function nspl\f\rpartial;
use function nspl\a\all;
use function nspl\a\any;
use function nspl\a\sorted;
$users = [array('name' => 'John', 'age' => 15), array('name' => 'Jack', 'age' => 35), array('name' => 'Sarah', 'age' => 25), array('name' => 'Norah', 'age' => 20), array('name' => 'Michael', 'age' => 30)];
// 1. Get user names from list of users presented with array data
$names = map(itemGetter('name'), $users);
echo sprintf("User names are: %s (users were presented with array data)\n", implode(', ', $names));
// 2. Convert list of user presented with array data to list of objects
$objects = map(object, $users);
echo sprintf("List of users converted to objects consists of types: %s\n", implode(', ', map('\\nspl\\ds\\getType', $objects)));
// 3. Sort users by age
$sorted = sorted($users, false, itemGetter('age'));
echo "Users sorted by age:\n";
foreach ($sorted as $user) {
echo sprintf(" %s - %s y.o.\n", $user['name'], $user['age']);
}
// 4. Check if all numbers are positive
$allPositive = all([1, 2, 3, 4, 5], rpartial(gt, 0));
echo $allPositive ? "All numbers are positive\n" : "At least one number was not positive\n";
echo sprintf("User ids are: %s\n", implode(', ', $userIds));
// 4. Count users younger than 25
$youngerThan25Count = reduce(function ($count, $user) {
return $count + (int) ($user->age < 25);
}, $users);
echo sprintf("%s users are younger than 25\n", $youngerThan25Count);
// 5. Get users younger than 25
$youngerThan25 = filter(function ($user) {
return $user->age < 25;
}, $users);
echo "These users are younger than 25:\n";
foreach ($youngerThan25 as $user) {
echo sprintf(" %s - %s y.o.\n", $user->name, $user->age);
}
// 6. Sort list of user objects by their name
$usersSortedByName = sorted($users, false, propertyGetter('name'));
echo "Users sorted by name:\n";
foreach ($usersSortedByName as $user) {
echo sprintf(" %s\n", $user->name);
}
// 7. Index users by ids
$usersIndexedByIds = indexed($users, propertyGetter('id'));
// In case of array it would be indexed($users, 'id')
echo "Users indexed by id:\n";
foreach ($usersIndexedByIds as $id => $user) {
echo sprintf(" %s. %s\n", $id, $user->name);
}
// 8. Create a map (name => age) from users data
$usersAgeByName = indexed($users, propertyGetter('name'), true, propertyGetter('age'));
echo "Users age:\n";
foreach ($usersAgeByName as $name => $age) {
// 8. Sort multidimensional array (sort list of users by their names)
$users = [array('name' => 'Robert', 'age' => 20), array('name' => 'Alex', 'age' => 30), array('name' => 'Jack', 'age' => 25)];
$sortedByName = sorted($users, itemGetter('name'));
display('8.1. Users sorted by name', $sortedByName);
$sortedByNameDesc = sorted($users, true, itemGetter('name'));
display('8.2. Users sorted by name in descending order', $sortedByNameDesc);
// 9. Sort list of objects by property value (sort list of users by their name)
$users = [new User('Robert', 20), new User('Alex', 30), new User('Jack', 25)];
$sortedByName = sorted($users, propertyGetter('name'));
display('9.1. Users presented as list of objects sorted by name', $sortedByName);
$sortedByNameDesc = sorted($users, true, propertyGetter('name'));
display('9.2. Users presented as list of objects sorted by name in descending order', $sortedByNameDesc);
// 10. Sort list of objects by method result (sort list of users by their age)
$sortedByAge = sorted($users, methodCaller('getAge'));
display('10.1. Users presented as list of objects sorted by age', $sortedByAge);
$sortedByAgeDesc = sorted($users, true, methodCaller('getAge'));
display('10.2. Users presented as list of objects sorted by age in descending order', $sortedByAgeDesc);
class User
{
public $name;
public $age;
public function __construct($name, $age)
{
$this->name = $name;
$this->age = $age;
}
public function getName()
{
return $this->name;
}
public function getAge()
public function testSorted()
{
$this->assertEquals([1, 2, 3], sorted([2, 3, 1]));
$this->assertEquals([1, 2, 3], sorted(new \ArrayIterator([2, 3, 1])));
$this->assertEquals(array('carrot' => 'c', 'banana' => 'b', 'apple' => 'a'), sorted(array('carrot' => 'c', 'apple' => 'a', 'banana' => 'b'), true));
$this->assertEquals(['forty two', 'answer', 'the', 'is'], sorted(['the', 'answer', 'is', 'forty two'], true, 'strlen'));
$this->assertEquals(['is', 'the', 'answer', 'forty two'], sorted(['the', 'answer', 'is', 'forty two'], 'strlen'));
$isFruit = function ($v) {
return in_array($v, ['apple', 'orange']);
};
$this->assertEquals(['apple', 'orange', 'cat'], sorted(['orange', 'cat', 'apple'], false, null, function ($v1, $v2) use($isFruit) {
if (!$isFruit($v1)) {
return 1;
}
if (!$isFruit($v2)) {
return -1;
}
return $v1 > $v2;
}));
$this->assertEquals([], sorted([]));
$this->assertEquals([1], sorted([1]));
$this->assertEquals(array('b' => null, 'a' => null), sorted(array('b' => null, 'a' => null)));
$list = [3, 1, 2];
$this->assertEquals([1, 2, 3], sorted($list));
$this->assertEquals([3, 1, 2], $list);
$this->assertEquals([1, 2, 3], call_user_func(sorted, [2, 3, 1]));
$this->assertEquals('\\nspl\\a\\sorted', sorted);
}