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You are now towards the end of this playground. However, the wild outside can be dangerous. So don't leave without a few tricks!
Test if an object is a promise
If you really have to, this is how you can test if an object is a promise :
obj instanceof Promise.
The problem is that this test only works with a real
Promise object. It will not work with the Q library or with an Angular promise.
Promise.race takes an array of promises. The result is a new promise that resolves or rejects as soon as one of the promises in the given array resolves or rejects.