如何使这段代码更简单？

Question

if(condition 1){
 var=changeVar(var);
 changed=true;
}

if(condition 2){
 var=changeVar2(var);
 changed=true;
}

if(condition 3){
 var=changeVar3(var);
 changed=true;
}

我不喜欢changed=true;重复三次。

Answer 1

您可以保存旧的var，并进行比较吗？

oldVar = var;

//your code here.

changed = (oldVar != var);

我最初在那里==，但那么问题中的错误（或至少是不同的）解决方案是不是？

Answer 2

<?php
if (condition 1) {
    var=changeVar(var);
}
if (condition 2) {
    var=changeVar2(var);
}
if (condition 3) {
    var=changeVar3(var);
}
changed=(condition 1||condition 2||condition 3||changed); // set changed value only if condition 1, condition 2 or condition 3 is true, keep old value otherwise
?>

Answer 3

if (condition 1 || condition 2 || condition 3) {
    if (condition 1) {
        var = changeVar(var);
    }
    if (condition 2) {
        var = changeVar2(var);
    }
    if (condition 3) {
        var = changeVar3(var);
    }
    changed = true;
}

Answer 4

$changed = true;
if ($cond1) {}
elseif ($cond2) {}
else { $changed = false; }

Answer 5

if(condition1||condition2||condition3) {
    switch(condition) {
        case 1: var = changeVar(var);
        break;
        case 2: var = changeVar2(var);
        break;
        case 3: var = changeVar3(var);
        break;
    }
    changed = true;
}