JavaScript整数比较所有条件判断失效仅触发else分支问题

代码存在两个核心bug，直接导致所有判断失效、永远进入else分支：

• 控制台日志存在运算符优先级错误
  JavaScript中字符串拼接符+的优先级高于>、==、===、<这类比较运算符，你写的类似console.log("assetQualifier[ii][0]>0: "+Number(assetQualifier[ii][0])>0)的语句，实际执行逻辑是先把提示字符串和变量值拼接成一整个长字符串，再拿这个字符串和右侧数字做比较——字符串转数字后会得到NaN，NaN和任何值比较都返回false，这就是你之前看到所有比较结果全为false的原因，日志完全不具备参考性。
• 条件判断结构逻辑错误
  你写的一长串判断全是独立的if语句，没有用else if串联。JavaScript里else只会和离它最近、未配对的if绑定，也就是你写的else只属于最后一个if(assetQualifier[ii][0]===10)分支。举个例子：如果变量值是0，第一个===0的判断确实会命中、给对应位置赋正确文案，但后面从===1到===9的判断全部不命中，走到最后===10的判断时也不命中，就会直接触发else，把之前已经赋好的文案覆盖成兜底内容，这就是不管随机值是多少，最后都走到else分支的根本原因。
• 额外逻辑漏洞：Math.floor(Math.random()*10)生成的随机数范围是0~9的整数，永远不会生成10，你写的===10分支属于永远不会执行的死代码。

var rollFood = Math.floor(Math.random()*10); 
var rollShelter = Math.floor(Math.random()*10); 
var rollTerritory = Math.floor(Math.random()*10);
var rollMaterials = Math.floor(Math.random()*10); 
var rollTools = Math.floor(Math.random()*10);
var rollGoods = Math.floor(Math.random()*10);
var rollCurrency = Math.floor(Math.random()*10);
var rollWater = Math.floor(Math.random()*10); 

var assetQualifier = [[rollFood,"test"],[rollShelter,""],[rollTerritory,""],[rollMaterials,""],[rollTools,""],[rollGoods,""],[rollCurrency,""],[rollWater,""]];
console.log("assetQualifier.length: "+assetQualifier.length);
console.log("assetQualifier[0][1]: "+assetQualifier[0][1]);
console.log(typeof assetQualifier[0][0]); 
console.log(typeof Number(assetQualifier[0][0])); 

var ii=0; 
while(ii<assetQualifier.length){
    const val = assetQualifier[ii][0];
    // 修复日志打印：直接传多参数避免优先级问题
    console.log("assetQualifier[ii][0]>0: ", val>0);
    console.log("assetQualifier[ii][0]==0: ", val==0);
    console.log("assetQualifier[ii][0]===0: ", val===0);
    console.log("assetQualifier[ii][0]==5: ", val==5);
    console.log("assetQualifier[ii][0]<5: ", val<5);

    // 修复条件结构：用else if串联，避免后续分支覆盖之前的赋值
    if(val===0){assetQualifier[ii][1]="is totally destitute in terms of"}
    else if(val===1){assetQualifier[ii][1]="is cripplingly deficient in"}
    else if(val===2){assetQualifier[ii][1]="has dodgy access to"}
    else if(val===3){assetQualifier[ii][1]="has some limited access to"}
    else if(val===4){assetQualifier[ii][1]="has modest access to"}
    else if(val===5){assetQualifier[ii][1]="is equal to his/her peers in terms of"}
    else if(val===6){assetQualifier[ii][1]="is faring a little better than average in terms of"}
    else if(val===7){assetQualifier[ii][1]="could fairly be regarded as privileged in terms of"}
    else if(val===8){assetQualifier[ii][1]="possesses a varied expanse of"}
    else if(val===9){assetQualifier[ii][1]="is up to his/her ears in"}
    else if(val===10){assetQualifier[ii][1]="is laughably subsumed by sheer glittering excess when it comes to"}
    else{assetQualifier[ii][1]="has resources as of yet unknown in terms of"};

    console.log("assetQualifier[ii][1]: "+assetQualifier[ii][1]);
    ii++;
}

如果需要保留值为10的分支，把随机数生成逻辑改成Math.floor(Math.random()*11)即可，生成范围会变成0~10。

这种固定值映射文案的场景，没必要写一长串if-else，直接用数组做映射表更简洁，也不会出现条件配对错误：

// 数组索引对应0-10的取值，元素为匹配的文案
const qualifierTextMap = [
    "is totally destitute in terms of",
    "is cripplingly deficient in",
    "has dodgy access to",
    "has some limited access to",
    "has modest access to",
    "is equal to his/her peers in terms of",
    "is faring a little better than average in terms of",
    "could fairly be regarded as privileged in terms of",
    "possesses a varied expanse of",
    "is up to his/her ears in",
    "is laughably subsumed by sheer glittering excess when it comes to"
]

// 循环内直接按索引取值即可，取不到再走兜底逻辑
while(ii<assetQualifier.length){
    const val = assetQualifier[ii][0];
    assetQualifier[ii][1] = qualifierTextMap[val] ?? "has resources as of yet unknown in terms of";
    ii++;
}

内容的提问来源于stack exchange，提问作者corvidia