正则表达式使用javascript获取多个模式之间的匹配文本

Question

Let's say i have the following string :

KEYWORD_1 OR "KEYWORD COMPOSITE_2" NOT "KEYWORD COMPOSITE_3" NOT "KEYWORD_4" AND "KEYWORD_5" KEYWORD_6 KEYWORD_7 KEYWORD_8 -KEYWORD_9

The result (this is not JSON format, just a visual formatting to explain the output) i want to get with my regex(es) is to split the string to the following three arrays of keywords, each one is corresponding to a delimiter (AND, OR, NOT) and contains all the words that follows every occurrence of the delimiter. Think of it like the google search field syntaxt :) :

final_result = {
    {
        OR: [KEYWORD_COMPOSITE_2]
    },
    {
        AND: [
            KEYWORD_1, 
            KEYWORD_5, 
            KEYWORD_6, 
            KEYWORD_7, 
            KEYWORD_8
        ]
    },
    {
        NOT: [
            KEYWORD_COMPOSITE_3, 
            KEYWORD_4, 
            KEYWORD_9
        ]
    }
}

I am trying to do this in javascript with one or more regex.

Any idea ? any help ? thank you

Answer 1

You cannot do that with regexes alone, some programming is still required:

function parse(input) {
    var keywords = ['AND', 'OR', 'NOT'];
    var result = {}, kw = 'AND';
    input.replace(/"(.+?)"|(\w+)/g, function($0, $1, $2) {
        if(keywords.indexOf($2) >= 0) {
            kw = $2;
        } else {
            if(!(kw in result))
                result[kw] = [];
            result[kw].push($1 || $2);
        }
    });
    return result;
}