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...意外に便利だった!!
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chiroruxx
October 30, 2019
Technology
0
210
...意外に便利だった!!
2019/10/30 PHP勉強会@東京で話したスライドです。
chiroruxx
October 30, 2019
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Transcript
ҙ֎ʹศརͩͬͨ 2019/10/30 PHPษڧձ@౦ژ લా ਓ
ࣗݾհ w લాਓ w !DIJSPSVYYYY w 3PYY
w εϙϯαʔืूதͰ͢ʂʂ
ҙ֎ʹศརͩͬͨ
ʮʯҙ֎ʹศརͩͬͨ
1)1ʹ͓͚Δʮʯ ͭ͋Δ
ՄมݸҾؔ function printArgs(...$inputs) { echo $inputs[0]; // apple echo $inputs[1];
// banana echo $inputs[2]; // chocolate } printArgs('apple', 'banana', 'chocolate');
ҾͷΞϯύοΫ function printArgs($a, $b, $c) { // (ུ) } $args
= ['apple', 'banana', 'chocolate']; printArgs(...$args);
͍͕ͬͯͨʜ w ػೳ͕ଘࡏ͢Δ͜ͱͬͯͨ w Ͱ࣮ࡍશવͬͯͳ͔ͬͨ w ΠϚΠν͍Ͳ͜Ζ͕Θ͔Βͳ͔ͬͨ ࠷ۙɺศརͳ͍ํΛݟ͚ͭͨ
ྫ w ࣗͰఆٛͨ͠4UBUVTΫϥε͕͋Δ w 4UBUVTΛෳѻ͏Ϋϥε͕΄͍͠ w ྻΛϥοϓͨ͠Ϋϥε w ཁ݅ҎԼ w
ҙͷͷ4UBUVTΠϯελϯεΛཁૉʹ࣋ͭ w 4UBUVTΠϯελϯεҎ֎Λཁૉʹ͍͚࣋ͬͯͳ͍ w Ωʔ࿈൪ͷΈʹ͢Δ ࿈ྻʹ͠ͳ͍
·ͣී௨ʹ࣮͠·͢
ී௨ͷ࣮ class StatusCollection { private $items; public function __construct(array $items)
{ $this->items = $items; } } $items = [Status::random(), Status::random(), Status::random()]; new StatusCollection($items);
ී௨ͷ࣮ class StatusCollection { private $items; public function __construct(array $items)
{ foreach ($items as $item) { if (!$item instanceof Status) { throw new InvalidArgumentException(); } } $this->items = $items; } } $items = [Status::random(), Status::random(), Status::random()]; new StatusCollection($items);
ී௨ͷ࣮ class StatusCollection { private $items; public function __construct(array $items)
{ foreach ($items as $item) { if (!$item instanceof Status) { throw new InvalidArgumentException(); } } $this->items = array_values($items); } } $items = [Status::random(), Status::random(), Status::random()]; new StatusCollection($items);
Λ͍͖ͬͯ·͢ʂ
Λ࣮ͬͨ class StatusCollection { private $items; public function __construct(...$items) {
foreach ($items as $item) { if (!$item instanceof Status) { throw new InvalidArgumentException(); } } $this->items = $items; } } $items = [Status::random(), Status::random(), Status::random()]; new StatusCollection(...$items);
Λ࣮ͬͨ class StatusCollection { private $items; public function __construct(Status ...$items)
{ $this->items = $items; } } $items = [Status::random(), Status::random(), Status::random()]; new StatusCollection(...$items);
ศརʂʂ
·ͱΊ w ʮʯΛ͏ͱҎԼͷέʔεͰϥΫʹͳΔ w ྻͷΩʔʹ͍ͭͯߟ͑ͨ͘ͳ͍ͱ͖ w ྻͷཁૉͷܕΛറΓ͍ͨͱ͖