[英]Removing duplicates from 2d array in Javascript
删除像下面这样的数组上的重复项的好算法是什么...
var allwords = [
['3-hidroxitiramina', '3-hidroxitiramina'],
['3-hidroxitiramina', '3-hidroxitiramina'],
['3-in-1 block', 'bloqueo 3 en 1'],
['abacterial', 'abacteriano'],
['abacteriano', 'abacteriano'],
['abciximab', 'abciximab'],
...
只是为了澄清一下,我要
['3-hidroxitiramina', '3-hidroxitiramina'],
要删除,所以只有一个
您可以将对象用作关联数组/哈希(如果您是指在第一维中为dups)
var allWordsObj = {};
for( var i = 0; i < allWords.length; i++ ) {
allWordsObj[allWords[i][0]] = allWords[i][1];
}
alert( allWordsObj['3-hidroxitiramina'] );
尝试这个:
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--;
}
}
}
[edit]:误读,在阅读了您的说明后,我建议:
var i = allwords.length-1, prev='';
do {
if (allwords[i].join('/') === prev) {
allwords.splice(i,1);
}
prev = allwords[i].join('/');
} while (i-- && i>-1);
(反转循环是优化步骤)
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