Adapter
-spreadOver
promisify
Converts an asynchronous function to return a promise.
+Use currying to return a function returning a Promise that calls the original function.
+Use the ...rest operator to pass in all the parameters.
In Node 8+, you can use util.promisify
const promisify = func =>
+ (...args) =>
+ new Promise((resolve, reject) =>
+ func(...args, (err, result) =>
+ err ? reject(err) : resolve(result))
+ );
+// const delay = promisify((d, cb) => setTimeout(cb, d))
+// delay(2000).then(() => console.log('Hi!')) -> Promise resolves after 2s
+spreadOver
Takes a veriadic function and returns a closure that accepts an array of arguments to map to the inputs of the function.
Use closures and the spread operator (...) to map the array of arguments to the inputs of the function.
const spreadOver = fn => argsArr => fn(...argsArr);
@@ -733,20 +747,6 @@ const multiplyAndAdd5 = pipeFunctions(multiply, add5)
multiplyAndAdd5(5, 2) -> 15
*/
promisify
Converts an asynchronous function to return a promise.
-Use currying to return a function returning a Promise that calls the original function.
-Use the ...rest operator to pass in all the parameters.
In Node 8+, you can use util.promisify
const promisify = func =>
- (...args) =>
- new Promise((resolve, reject) =>
- func(...args, (err, result) =>
- err ? reject(err) : resolve(result))
- );
-// const delay = promisify((d, cb) => setTimeout(cb, d))
-// delay(2000).then(() => console.log('Hi!')) -> Promise resolves after 2s
-runPromisesInSeries
Runs an array of promises in series.
Use Array.reduce() to create a promise chain, where each promise returns the next promise when resolved.