???????????20?????? ??????????

???????????? ???????[ 2012/12/17 10:05:54 ] ????????

????9??False——Happy????

????Ruby??Python?????????????Щ?С????????????????????顣????е???????????????????????????????????

??????PHP?У???????????????????CodeIgniter??????????????????????????flase??????????????????????????Щ???????????????get_error()??????

????Exception-happy??????false-happy??????????????????????粻??????S3??????????????????????????????????????????????Exception??????????????????????磺

class CustomException extends Exception {}

???????????????????????????????????

????10??Use Guard Clauses

???????if??????????????????·?????????????飬???if?????true???if???????????????else??????????????????δ???

1.function someFunction($param) {
2.    if ($param == 'OK') {
3.       $this->doSomething();
4.       return true;
5.    } else {
6.       return false;
7.    }
8.}

???????????????????????????????????????????????????????????????????????????????????????????????￡?

1.function someFunction($param) {
2.    if ($param != 'OK') return false;
3.    $this->doSomething();
4.    return true;
5.}

????11?????While???м??????

???????for??????????????????飺

1.for (var i = 0; i < x; i++) {
2. ...
3.}

?????????for??????????????????????Щ??????????while?????????

1.var i = x;
2.while (i--) {
3.    ...
4.}

????12????????????????

??????????????????????????

1.class SomeClass {
2.   function monsterMethod() {
3.      if($weArePilots) {
4.         $this->goAndDressUp();
5.         $this->washYourTeeth();
6.         $this->cleanYourWeapon();
7.         $this->takeYourHelmet();
8.         if($this->helmetDoesNotFit())
9.            $this->takeAHat();
10.         else
11.            $this->installHelmet();
12.         $this->chekcYourKnife();
13.         if($this->myAirplain() == "F22")
14.            $this->goToArmyAirport();
15.         else
16.            $this->goToCivilianAirport();
17.         $this->aim();
18.         $this->prepare();
19.         $this->fire();
20.      }
21.   }
22.}

??????????′???

1.class SomeClass {
2.   function monsterMethod() {
3.      if($weArePilots) {
4.         $this->prepareYourself();
5.         $this->tryHelmet();
6.         $this->findYourAirport();
7.         $this->fightEnemy();
8.      }
9.   }
10.   private function prepareYourself() {
11.      $this->goAndDressUp();
12.      $this->washYourTeeth();
13.      $this->cleanYourWeapon();
14.      $this->chekcYourKnife();
15.   }
16.   private function tryHelmet() {
17.      $this->takeYourHelmet();
18.      if($this->helmetDoesNotFit())
19.         $this->takeAHat();
20.      else
21.         $this->installHelmet();
22.   }
23.   private function findYourAirport() {
24.      if($this->myAirplain() == "F22")
25.         $this->goToArmyAirport();
26.      else
27.         $this->goToCivilianAirport();
28.   }
29.   private function fightEnemy() {
30.      $this->aim();
31.      $this->prepare();
32.      $this->fire();
33.   }
34.}