JavaScript: Create an object from the given key-value pairs
JavaScript fundamental (ES6 Syntax): Exercise-41 with Solution
Write a JavaScript program to create an object from the given key-value pairs.
- Use Array.prototype.reduce() to create and combine key-value pairs.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const object_From_Pairs = arr => arr.reduce((a, v) => ((a[v[0]] = v[1]), a), {});
console.log(object_From_Pairs([['a', 1], ['b', 2]]));
console.log(object_From_Pairs([[1, 10], [2, 20], [3, 30]]));
Sample Output:
{"a":1,"b":2} {"1":10,"2":20,"3":30}
Pictorial Presentation:
Flowchart:

Live Demo:
See the Pen javascript-basic-exercise-1-41 by w3resource (@w3resource) on CodePen.
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JavaScript: Tips of the Day
Chunks an array into n smaller arrays
Example:
const tips_chunkIntoN = (arr, n) => { const size = Math.ceil(arr.length / n); return Array.from({ length: n }, (v, i) => arr.slice(i * size, i * size + size) ); } console.log(tips_chunkIntoN([1, 2, 3, 4, 5, 6, 7,8], 4));
Output:
[[1,2],[3,4],[5,6],[7,8]]
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