[英]How would you simplify this if/else statement?
我对学习JavaScript非常陌生,因此我使用了if / else来对一些数据进行分类,但是数据量很大。
它是VO2 Max计算器的一部分,该计算器计算出一个人的VO2max,然后确定该值是否为“优”(低至差)。
我该如何简化? 我可以阅读以找出答案吗? 还是使用以下内容不是不好的做法? 谢谢。
if(vitals.gender === 1) {
if(vitals.age >= 18 && vitals.age <= 25) {
if(vo2 > 60) {
VO2MaxRating = "Excellent";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 52) {
VO2MaxRating = "Good";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 47) {
VO2MaxRating = "Above Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 42) {
VO2MaxRating = "Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 37) {
VO2MaxRating = "Below Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 30) {
VO2MaxRating = "Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else {
VO2MaxRating = "Very Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
}
} else if (vitals.age >= 26 && vitals.age <= 35) {
if(vo2 > 56) {
VO2MaxRating = "Excellent";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 49) {
VO2MaxRating = "Good";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 43) {
VO2MaxRating = "Above Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 40) {
VO2MaxRating = "Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 35) {
VO2MaxRating = "Below Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 30) {
VO2MaxRating = "Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else {
VO2MaxRating = "Very Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
}
} else if (vitals.age >= 36 && vitals.age <= 45) {
if(vo2 > 51) {
VO2MaxRating = "Excellent";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 43) {
VO2MaxRating = "Good";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 39) {
VO2MaxRating = "Above Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 35) {
VO2MaxRating = "Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 31) {
VO2MaxRating = "Below Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 26) {
VO2MaxRating = "Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else {
VO2MaxRating = "Very Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
}
} else if (vitals.age >= 46 && vitals.age <= 55) {
if(vo2 > 45) {
VO2MaxRating = "Excellent";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 39) {
VO2MaxRating = "Good";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 36) {
VO2MaxRating = "Above Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 32) {
VO2MaxRating = "Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 29) {
VO2MaxRating = "Below Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 25) {
VO2MaxRating = "Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else {
VO2MaxRating = "Very Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
}
} else if (vitals.age >= 56 && vitals.age <= 65) {
if(vo2 > 41) {
VO2MaxRating = "Excellent";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 36) {
VO2MaxRating = "Good";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 32) {
VO2MaxRating = "Above Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 30) {
VO2MaxRating = "Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 26) {
VO2MaxRating = "Below Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 22) {
VO2MaxRating = "Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else {
VO2MaxRating = "Very Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
}
} else if (vitals.age >= 65) {
if(vo2 > 37) {
VO2MaxRating = "Excellent";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 33) {
VO2MaxRating = "Good";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 29) {
VO2MaxRating = "Above Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 26) {
VO2MaxRating = "Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 22) {
VO2MaxRating = "Below Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 20) {
VO2MaxRating = "Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else {
VO2MaxRating = "Very Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
}
} else {
VO2MaxRating = "Missing";
document.getElementById("outputVo2").textContent = 'Either you\re under 18 or missing details';
}
} else {
if(vitals.age >= 18 && vitals.age <= 25) {
if(vo2 > 56) {
VO2MaxRating = "Excellent";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 47) {
VO2MaxRating = "Good";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 42) {
VO2MaxRating = "Above Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 38) {
VO2MaxRating = "Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 33) {
VO2MaxRating = "Below Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 28) {
VO2MaxRating = "Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else {
VO2MaxRating = "Very Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
}
} else if (vitals.age >= 26 && vitals.age <= 35) {
if(vo2 > 52) {
VO2MaxRating = "Excellent";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 45) {
VO2MaxRating = "Good";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 39) {
VO2MaxRating = "Above Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 35) {
VO2MaxRating = "Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 31) {
VO2MaxRating = "Below Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 26) {
VO2MaxRating = "Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else {
VO2MaxRating = "Very Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
}
} else if (vitals.age >= 36 && vitals.age <= 45) {
if(vo2 > 45) {
VO2MaxRating = "Excellent";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 38) {
VO2MaxRating = "Good";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 34) {
VO2MaxRating = "Above Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 31) {
VO2MaxRating = "Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 27) {
VO2MaxRating = "Below Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 22) {
VO2MaxRating = "Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else {
VO2MaxRating = "Very Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
}
} else if (vitals.age >= 46 && vitals.age <= 55) {
if(vo2 > 40) {
VO2MaxRating = "Excellent";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 34) {
VO2MaxRating = "Good";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 31) {
VO2MaxRating = "Above Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 28) {
VO2MaxRating = "Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 25) {
VO2MaxRating = "Below Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 20) {
VO2MaxRating = "Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else {
VO2MaxRating = "Very Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
}
} else if (vitals.age >= 56 && vitals.age <= 65) {
if(vo2 > 37) {
VO2MaxRating = "Excellent";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 32) {
VO2MaxRating = "Good";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 28) {
VO2MaxRating = "Above Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 25) {
VO2MaxRating = "Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 22) {
VO2MaxRating = "Below Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 18) {
VO2MaxRating = "Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else {
VO2MaxRating = "Very Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
}
} else if (vitals.age >= 65) {
if(vo2 > 32) {
VO2MaxRating = "Excellent";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 28) {
VO2MaxRating = "Good";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 25) {
VO2MaxRating = "Above Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 22) {
VO2MaxRating = "Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 19) {
VO2MaxRating = "Below Average";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else if (vo2 >= 17) {
VO2MaxRating = "Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
} else {
VO2MaxRating = "Very Poor";
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + VO2MaxRating + ")";
}
} else {
VO2MaxRating =
document.getElementById("outputVo2").textContent = 'Either you\re under 18 or missing details';
}
}
使您要打印每个选项的值成为对象。 根据布尔检查的方式,您可以枚举键为截止值的对象。 然后,你break
了循环,你得到一个比赛后。
编辑:如果将循环转换为函数,则可重用。 只需传入您的vo2
和值的对象即可。
const VO2MaxRating = {
52: 'Excellent',
47: 'Good',
42: 'Above Average',
37: 'Average',
30: 'Below Average',
0: 'Poor',
}
const setRating = (rate, maxRatingObject) => {
for (let vo2Rating in maxRatingObject) {
if (rate >= parseInt(vo2Rating)) {
return maxRatingObject[vo2Rating]
}
}
}
document.getElementById("outputVo2").textContent = vo2 + ' ml/kg/min (' + setRating(vo2, VO2MaxRating) + ")";
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