JavaScript: Create an array of key-value pair arrays from a given object
JavaScript fundamental (ES6 Syntax): Exercise-40 with Solution
Write a JavaScript program to create an array of key-value pair arrays from a given object.
- Use Object.entries() to get an array of key-value pair arrays from the given object.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const object_to_pairs = obj => Object.keys(obj).map(k => [k, obj[k]]);
console.log(object_to_pairs({ a: 1, b: 2 }));
console.log(object_to_pairs({ a: 1, b: 2, c: 3 }));
Sample Output:
[["a",1],["b",2]] [["a",1],["b",2],["c",3]]
Pictorial Presentation:
Flowchart:

Live Demo:
See the Pen javascript-basic-exercise-1-40 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript program to remove the key-value pairs corresponding to the given keys from an object.
Next: Write a JavaScript program to create an object from the given key-value pairs.
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JavaScript: Tips of the Day
Returns an array of n-tuples of consecutive elements
Example:
const tips_arr = (n, arr) => n > arr.length ? [] : arr.slice(n - 1).map((v, i) =>[...arr.slice(i, i + n - 1), v]); console.log(tips_arr(2, [1, 2, 3, 4, 5])); console.log(tips_arr(3, [1, 2, 3, 4, 5])); console.log(tips_arr(5, [1, 2, 3, 4]));
Output:
[[1, 2], [2, 3], [3, 4], [4, 5]] [[1, 2, 3], [2, 3, 4], [3, 4, 5]] []
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