算法必知必会：字符串反转

[pengjielee]

实现1:

const reverse1 = ( str ) => {
	return str.split('').reverse().join('')
}

实现2：

const reverse2 = ( str ) => {
	let result = '';
	for( let char of str ){
		result = char + result
	}
	return result
}

实现3：

const reverse3 = ( str ) => {
	return str.split('').reduce( (result,char) => char + result );
}