JS 避免在多个位置使用相同的 if 语句

Question

我有一个function，它处理大量 JSON 文档，inserts 将它们处理成MongoDB。

我想log 这个函数在几个位置做什么，然后将有效负载转移到 S3。但是，这是被调用者的条件。

function doStuffWithJSON(options={}) {
    const apiRes = getJSONFromAPI();

    if (options.logAndChuck) { console.log('we got results successfully') }

    //50 lines of code that are unconditionally being executed

    if (options.logAndChuck) { console.log('we did stuff with the result') }

    //Another 50 lines of code that are unconditionally being executed

    if (options.logAndChuck) { sendJsonToS3(apiRes) }
}

这里的重复模式是我在函数的多个不同位置有相同的if 语句。考虑到它的性质，不确定是否有任何方法可以避免这种情况。

想知道是否有任何模式可以像这样清理东西。

谢谢！

Answer 1

这真的取决于 - 恕我直言，多次使用简单的 if 语句不是问题。但是，如果它更复杂，您可以为此创建一个函数 - 在本地函数范围内或以上采用回调函数：

function doStuffWithJSON(options={}) {
    const exec = (callbackFn) => {
        if (options.logAndChuck) {
            callbackFn();
        }
    };

    const apiRes = getJSONFromAPI();

    exec(() => console.log('we got results successfully'));

    //50 lines of code that are unconditionally being executed

    exec(() => console.log('we did stuff with the result'));

    //Another 50 lines of code that are unconditionally being executed

    exec(() => sendJsonToS3(apiRes));
}

Answer 2

将问题的 cmets 中的建议放入代码中：

function doStuffWithJSON(options={}) {
    const apiRes = getJSONFromAPI();

    logAndChuck('we got results successfully')

    //50 lines of code that are unconditionally being executed

    logAndChuck('we did stuff with the result')

    //Another 50 lines of code that are unconditionally being executed

    if (options.logAndChuck) { sendJsonToS3(apiRes) }
}

function logAndChuck(options, message) {
    if (options.logAndChuck) { console.log(message) }
}