如何计算字符串数组中的重复项? [英] How to count duplicates in an array of strings?

问题描述

如何对字符串进行分区以提取其中出现的所有单词/术语，并计算每个单词出现的次数? 例如让: 字符串q = "foo bar foo" 我需要DS {<foo,2>, <bar,1>}.这是我随附的最不繁琐的代码*.过错还是不太冗长的选择?

How do I partition a String to extract all the words/terms that occur in it and count how many times each occurs? For example let: String q = "foo bar foo" I want a DS {<foo,2>, <bar,1>}. This is the least verbose code I code come with*. Faults or less verbose alternatives?

String[] split = q.toString().split("\\s");
        Map<String, Integer> terms = new HashMap<String, Integer>();

        for (String term : split) {
            if(terms.containsKey(term)){
                terms.put(term, terms.get(term)+1);
            }
        }

(尚未编译)

推荐答案

修改后的代码:

String[] split = q.toString().split("\\s");
Map<String, Integer> terms = new HashMap<String, Integer>();

for (String term : split) {
    int score = 0;
    if(terms.containsKey(term)){
        score = terms.get(term);
    }

    terms.put(term, score +1);
}

PS:未经测试.

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