I am looking for a way to calculate the length of an array returned by a promising function:
getUserStockMovementList(userID: string): Promise<calculatedMovement[]>
Is it possible to store a promise-returning function in a constant variable?
const stockMovements = getUserStockMovementList(userID);
for (let i = 0; i < rawMovementList.length; i++) {
// perform actions
}
When you call this async method, you will receive a Promise of the array instead of the actual Array instance. To access the actual array instance, it is necessary to await the promise:
async someAsyncFunction () {
const rawMovementList = await rawMovementListOfTheUserForTheStockCode(userID, code);
for (let i = 0; i < rawMovementList.length; i++) {
// do stuff
}
}Alternatively, you can use the older approach with then:
rawMovementListOfTheUserForTheStockCode(userID, code).then(rawMovementList => {
for (let i = 0; i < rawMovementList.length; i++) {
// do stuff
}
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