function dupicateWord(arr) {
let obj= {}
arr.forEach(ele=>{
if(!Object.keys(obj).includes(ele)) obj[ele]=false
else obj[ele]=true
})
return obj
}
function duplicatedWord(chars){
var map=new Map();
for(var i=0;i<chars.length;i++){
if(map.has(chars[i])) map.set(chars[i],'true');
else map.set(chars[i],'false');
}
return map;
}
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本文标题：duplicate array
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