Javascript 如何筛选出具有相同关键字的各种标题

我有相似的字符串，因为它们包含相同的关键字

如果多个字符串具有三个或更多相同的关键字，那么我只希望返回一个字符串

例如：

我想为3个关键字过滤所有字符串，然后我只想保留一个字符串

不确定我是否可以单独使用正则表达式或需要JavaScript

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帮助？

把所有的句子循环一遍，去掉标点符号，把单词放在地图上怎么样。聚合计数，然后在哈希上循环，以查找出现的单词超过3个

function filter() {
    var sentences = [
        "Ex Machina is an example of female artificial intelligence.",
        "Ex Machina, why are most artificial intelligence represented as female?",
        "Will Artificial Intelligence be represented females like in Ex Machina?"
    ];

    var word_map = {};

    for (var i = 0; i < sentences.length; i++) {
        var cur_sentence = sentences[i];
        cur_sentence = remove_punctuations(cur_sentence).toLowerCase().split(' ');

        cur_sentence.forEach(function(w) {
            if (word_map.hasOwnProperty(w)) {
                word_map[w] += 1;
            } else {
            word_map[w] = 1;
            }
        });
    }

    console.log(word_map);

}

function remove_punctuations(w) {
    return w.replace(/[\.?,]/g, '');
}

function filter() {
    var sentences = [
        "Ex Machina is an example of female artificial intelligence.",
        "Ex Machina, why are most artificial intelligence represented as female?",
        "Will Artificial Intelligence be represented females like in Ex Machina?"
    ];

    var word_map = {};

    for (var i = 0; i < sentences.length; i++) {
        var cur_sentence = sentences[i];
        cur_sentence = remove_punctuations(cur_sentence).toLowerCase().split(' ');

        cur_sentence.forEach(function(w) {
            if (word_map.hasOwnProperty(w)) {
                word_map[w] += 1;
            } else {
            word_map[w] = 1;
            }
        });
    }

    console.log(word_map);

}

function remove_punctuations(w) {
    return w.replace(/[\.?,]/g, '');
}