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Feb 19th, 2019
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  1. function reverse(str){
  2. var rtnStr = [];
  3. if(!str || typeof str != 'string' || str.length < 2 ) return str;
  4.  
  5. for(var i = str.length-1; i>=0;i--){
  6. rtnStr.push(str[i]);
  7. }
  8. return rtnStr.join('');
  9. }
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