在Javascript中从2d数组中删除重复项

可以将对象用作关联数组/哈希(如果您是指第一维中的DUP)

var allWordsObj = {};
for( var i = 0; i < allWords.length; i++ ) {
    allWordsObj[allWords[i][0]] = allWords[i][1];
}

alert( allWordsObj['3-hidroxitiramina'] );

试试这个:

var len = allwords.length, i, j, first;
for (i=0; i<len-1; i++) {
    first = allwords[i].toString();
    for (j=i+1; j<len; j++) {
        if (first === allwords[j].toString()) {
            allwords.splice(j, 1);
            len--;
        }
    }
}

 var i = allwords.length-1, prev='';
 do {
     if (allwords[i].join('/') === prev) {
        allwords.splice(i,1);
     }
     prev = allwords[i].join('/');
 } while (i-- && i>-1);