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function reverse(str){ | |
var rtnStr = []; | |
if(!str || typeof str != 'string' || str.length < 2 ) return str; | |
for(var i = str.length-1; i>=0;i--){ | |
rtnStr.push(str[i]); | |
} | |
return rtnStr.join(''); | |
} |
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