以下のように記述することで配列に条件に一致する値が存在するか検証できます。
const array = [1, 3, 5, 7, 9]
const test1 = num => num > 8
const test2 = num => num > 10
console.log(array.some(test1)) // true
console.log(array.some(test2)) // false
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