我设置了 10 个“标签”,每个都有一个 ID(格式:00:00:00:xx:xx:xx)和 translatedID(格式:TXT)。我得到字符串列表违反标签,我想将其从 translatedID 转换为 ID。我有一个定义值的映射:Map(10) { '00:00:00:02:28:47' => 'T7T', '00:00:00:02:89:70' => 'T3T', '00:00:00:02:89:51' => 'T4T', '00:00:00:02:27:bd' => 'T5T', '00:00:00:02:89:31' => 'T6T', '00:00:00:02:89:a0' => 'T1T', '00:00:00:02:89:af' => 'T2T', '00:00:00:02:89:4d' => 'T9T', '00:00:00:02:89:28' => 'T10T', '00:00:00:02:89:a1' => 'T8T'}例子:input = 'T4T____T5T____T2T____T10T____T6T____'(desired) output = '00:00:00:02:89:51, 00:00:00:02:27:bd, 00:00:00:02:89:af, 00:00:00:02:89:28, 00:00:00:02:89:31'我的第一个想法是遍历映射中的每个值,查看它是否存在于输入中,如果存在,则将相应的 ID 添加到输出中。但由于不必要的额外循环,这不是最优的。有什么建议么?此外,我的代码使用全局变量来定义地图变量。我知道这是不受欢迎的,我有更好的方法吗?我的代码格式如下:let dict = new Map()function customQueryString() { return new Promise((resolve, reject) => { client.query(query, (err, res) => { res.rows.forEach(psqltag => { dict.set(psqltag.m_violator_tag, psqltag.m_translatedid) }); resolve(queryStringAddition) // defined elsewhere doesnt matter for this problem }) })}function loopingQueryFunction(loopQuery) { client.query(loopQuery, (err, res) => { res.rows.forEach(tag => { input = tag.violating_tags // where the input string is found output = ??? // where the translation needs to happen } }}async function asyncCall() { let qStringAddition = await customQueryString(); loopQuery = loopQuery + qStringAddition for (let i = 0; i< 100; i++) { console.log("loop " + i) await delay(1000) loopingQueryFunction(loopQuery) }}
1 回答
慕沐林林
TA贡献2016条经验 获得超9个赞
您可以使用正则表达式来获取所有已翻译的 ID。让我们假设它们都是T<number>T格式的,这看起来是真的。
const input = 'T4T____T5T____T2T____T10T____T6T____';
const dictEntries = [...dict.entries()].map(([id, translatedId]) => ({id, translatedId}));
const output = input
.match(/T\d+T/g)
.map(translatedId => dictEntries.find(entry => entry.translatedId === translatedId))
.filter(entry => entry !== undefined)
.map(entry => entry.id);
// ["00:00:00:02:89:51", "00:00:00:02:27:bd", "00:00:00:02:89:af", "00:00:00:02:89:28", "00:00:00:02:89:31"]
output.join(', ')如果你想要它作为逗号分隔的字符串,你可以得到。
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