function seqSearch(arr, data) {
var returnIndex = -1
var max = arr[0]
var min = arr[0]
arr.forEach((cur, index) => {
if (cur === data) {
returnIndex = index
}
if (cur > max) {
max = cur
}
if (min > cur) {
min = cur
}
})
return {
index: returnIndex,
max: max,
min: min
}
}
var arr = [4, 5, 7, 1, 8, 19]
console.log(seqSearch(arr, 8))//{index: 4,max: 19,mix: 1}
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