JavaScript: Create a function that invokes the provided function with its arguments arranged according to the specified indexes
JavaScript: Exercise-158 with Solution
Write a JavaScript program to create a function that invokes the provided function with its arguments arranged according to the specified indexes.
- Use Array.prototype.map() to reorder arguments based on indexes.
- Use the spread operator (...) to pass the transformed arguments to fn.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const rearg = (fn, indexes) => (...args) => fn(...indexes.map(i => args[i]));
var rearged = rearg(
function(a, b, c) {
return [a, b, c];
},
[2, 0, 1]
);
console.log(rearged('b', 'c', 'a'));
Sample Output:
["a","b","c"]
Pictorial Presentation:
Flowchart:

Live Demo:
See the Pen javascript-basic-exercise-158-1 by w3resource (@w3resource) on CodePen.
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JavaScript: Tips of the Day
How to check whether a string contains a substring in JavaScript?
ECMAScript 6 introduced String.prototype.includes:
const string = "foo"; const substring = "oo"; console.log(string.includes(substring));
includes doesn't have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found:
var string = "foo"; var substring = "oo"; console.log(string.indexOf(substring) !== -1);
Ref: https://bit.ly/3fFFgZv
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