javascript - 从约束列表中生成所有可能的对象

Question

<分区>

Answer 1

var options = {
        key1: [ 'possible value1' , 'possible value2'],
        key2: [ 2, 4, 7, 1],
        key3: ['TEST1', 'TEST2']
};

function getCombinations(options, optionIndex, results, current) {
    var allKeys = Object.keys(options);
    var optionKey = allKeys[optionIndex];

    var vals = options[optionKey];

    for (var i = 0; i < vals.length; i++) {
        current[optionKey] = vals[i];

        if (optionIndex + 1 < allKeys.length) {
            getCombinations(options, optionIndex + 1, results, current);
        } else {
            var res = JSON.parse(JSON.stringify(current));
            results.push(res);
        }
    }

    return results;
}

var results = getCombinations(options, 0, [], {});

document.body.innerHTML = JSON.stringify(results);