JavaScript: Create a function that invokes fn with partials appended to the arguments it receives
JavaScript fundamental (ES6 Syntax): Exercise-169 with Solution
Write a JavaScript program to create a function that invokes fn with partials appended to the arguments it receives.
- Use the spread operator (...) to append partials to the list of arguments of fn.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const partialRight = (fn, ...partials) => (...args) => fn(...args, ...partials);
const greet = (greeting, name) => greeting + ' ' + name + '!';
const greetJohn = partialRight(greet, 'John');
console.log(greetJohn('Hello'));
Sample Output:
Hello John!
Flowchart:

Live Demo:
See the Pen javascript-basic-exercise-169-1 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript program to group the elements into two arrays, depending on the provided function's truthiness for each element.
Next: Write a JavaScript program to create a function that invokes fn with partials prepended to the arguments it receives.
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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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