As I delve into this codebase, one snippet keeps popping up:
$q.all([promise]).then(responseFunc);However, I find this confusing. After reading the documentation, I wonder why not simply use the following, as it's just a single promise...
promise.then(responseFunc);
Am I overlooking something here? What makes the former approach preferable to the latter?
Though unusual, there is indeed a distinction: The responseFunc function will receive an array containing the result, rather than the result itself.
A clearer way to express this would be either
promise.then(res => responseFunc([res]))
or
promise.then(Array.of).then(responseFunc)
Sure, here is a potential benefit that comes to mind (building on my previous point)
const processData = (data) => {
// perform operations on data
};
Promise.all([fetchData1, fetchData2]).then(processData);
Promise.all([fetchData3]).then(processData);
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