英文:
JavaScript - if value exist in array return object key
问题
I got an object of three array ranges (high, medium, low) containing random numbers.
我得到了一个包含随机数字的三个数组范围对象（高、中、低）。
How can i search through all three value arrays and return the object key for the one that matches the search number?
如何在这三个值数组中进行搜索并返回与搜索数字匹配的对象键？
Example:
示例：
const search = "63";
const rangesObj = {
high: [67, 94, 57],
medium: [43, 89, 63, 12],
low: [27, 41, 77, 99],
};
// returns undefined, should return medium
// 返回 undefined，应该返回 medium
console.log(Object.keys(rangesObj).find(val => search.includes(val)))
英文:
I got an object of three array ranges (high, medium, low) containing random numbers.
How can i search through all three value arrays and return the object key for the one that matches the search number?
Example:
const search = "63";
const rangesObj = {
high: [67, 94, 57],
medium: [43, 89, 63, 12],
low: [27, 41, 77, 99],
};
// returns *undefined*, should return *medium*
console.log(Object.keys(rangesObj).find(val => search.includes(val)))
答案1
得分: 2
- 使用
rangesObj[key]来获取与每个特定键对应的数组，然后使用Array#includes。 - 需要先将
search转换为数字，以使类型匹配。
const search = "63";
const rangesObj = {
high: [67, 94, 57],
medium: [43, 89, 63, 12],
low: [27, 41, 77, 99],
};
console.log(Object.keys(rangesObj).find(k => rangesObj[k].includes(+search)));
英文:
- Use
rangesObj[key]to get the array corresponding to each particular key, then useArray#includes. searchneeds to be converted to a number first so that the types match.
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-js -->
const search = "63";
const rangesObj = {
high: [67, 94, 57],
medium: [43, 89, 63, 12],
low: [27, 41, 77, 99],
};
console.log(Object.keys(rangesObj).find(k => rangesObj[k].includes(+search)));
<!-- end snippet -->
答案2
得分: 1
val 在你的示例中是键，所以你需要使用 rangeObj[key] 来让 include() 完成它的功能。
此外，将 search 转换为数字 (+search)，否则它不会匹配。
const search = "63";
const rangesObj = {
high: [67, 94, 57],
medium: [43, 89, 63, 12],
low: [27, 41, 77, 99],
};
const res = Object.keys(rangesObj).find(key => rangesObj[key].includes(+search))
console.log(res)
希望这有所帮助。
英文:
val in your example is the key, so you'll need rangeObj[key] to let include() do his thing.
Also, convert search to number (+search) otherwise it wont match
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-js -->
const search = "63";
const rangesObj = {
high: [67, 94, 57],
medium: [43, 89, 63, 12],
low: [27, 41, 77, 99],
};
const res = Object.keys(rangesObj).find(key => rangesObj[key].includes(+search))
console.log(res)
<!-- end snippet -->
答案3
得分: 1
Object.keys(rangesObj).find(x => rangesObj[x].includes(+search))
英文:
Object.keys(rangesObj).find(x => rangesObj[x].includes(+search))
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