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| function reverse1 (str) {
return str.split('').reverse().join('')
}
function reverse2 (str) {
const arr = str.split('')
return arr.reduce((pre, cur)=>{
return cur + pre
},'')
}
function reverse3 (str) {
let start = 0
let end = str.length - 1
while (start < end) {
[str[start], str[end]] = [str[end],str[start]]
start++
end--
}
return str
}
|
