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我想要做一個模式匹配並替換我的MongoDB mapReduce。我在數據庫中映射了推文的來源。並獲得重複的結果,如在MongoDB中替換()MapReduce映射函數
1 - web has 38867
2 - <a href="http://www.tweetdeck.com" rel="nofollow">TweetDeck</a> has 23873
3 - <a href="http://www.hootsuite.com" rel="nofollow">HootSuite</a> has 10696
4 - <a href="http://twitterfeed.com" rel="nofollow">twitterfeed</a> has 9562
5 - <a href="http://twitter.com/#!/download/iphone" rel="nofollow">Twitter for iPhone</a> has 6818
6 - <a href="http://www.echofon.com/" rel="nofollow">Echofon</a> has 5869
7 - <a href="http://www.tweetdeck.com/" rel="nofollow">TweetDeck</a> has 5497
#2和#7唯一的區別是「.com /」和「.com」在href。我想在我的map函數中進行模式匹配,但是我收到了編譯錯誤。我可能會迷失在翻譯層面。
PHP ==> Mongo ==> javascript。
這是我的代碼塊
$map = 'function() {
if (!this.source) {
return;
}
s = this.source;
s = s.replace(/\/\"/i,"/"");
emit(s,1);
}';
$reduce = "function(previous, current) {
var count = 0;
for (index in current) {
count += current[index];
}
return count;
}";
$mapFunc = new MongoCode($map);
$reduceFunc = new MongoCode($reduce);
$collectionOutName = 'mrTweetSource';
$mr = $db->command(array(
'mapreduce' => 'tweet',
'map' => $mapFunc,
'reduce' => $reduceFunc,
'out'=>$collectionOutName));
結果是
(
[assertion] => couldn't compile code for: _map
[assertionCode] => 13598
[errmsg] => db assertion failure
[ok] => 0
)