JavaScript: Check if the predicate is truthy on all elements of a collection
JavaScript fundamental (ES6 Syntax): Exercise-116 with Solution
Write a JavaScript program to check if the predicate (second argument) is truthy on all elements of a collection (first argument).
- Use Array.prototype.every() to check if each passed object has the specified property and if it returns a truthy value.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const truthCheckCollection = (collection, pre) => collection.every(obj => obj[pre]);
console.log(truthCheckCollection([{ user: 'Tinky-Winky', sex: 'male' }, { user: 'Dipsy', sex: 'male' }], 'sex'));
Sample Output:
true
Flowchart:

Live Demo:
See the Pen javascript-basic-exercise-116-1 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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