JavaScript: Accepts a converging function and a list of branching functions
JavaScript fundamental (ES6 Syntax): Exercise-68 with Solution
Write a JavaScript program that accepts a converging function and a list of branching functions. It returns a function that applies each branching function to the arguments. The results of the branching functions are passed as arguments to the converging function.
- Use Array.prototype.map() and Function.prototype.apply() to apply each function to the given arguments.
- Use the spread operator (...) to call converger with the results of all other functions.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const converge = (converger, fns) => (...args) => converger(...fns.map(fn => fn.apply(null, args)));
const average = converge((a, b) => a / b, [
arr => arr.reduce((a, v) => a + v, 0),
arr => arr.length
]);
console.log(average([ 6, 7]));
console.log(average([1, 2, 3, 4, 5, 6, 7]));
Sample Output:
6.5 4
Pictorial Presentation:
Flowchart:

Live Demo:
See the Pen javascript-basic-exercise-68-1 by w3resource (@w3resource) on CodePen.
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JavaScript: Tips of the Day
Assigns default values for all properties in an object that are undefined
Example:
const tips_defaults = (obj, ...defs) => Object.assign({}, obj, ...defs.reverse(), obj); console.log(tips_defaults({ p: 1 }, { q: 2 }, { q: 6 }, { p: 3 }));
Output:
[object Object] { p: 1, q: 2 }
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