JavaScript: Pad a string on both sides with the specified character
JavaScript fundamental (ES6 Syntax): Exercise-38 with Solution
Write a JavaScript program to pad a string on both sides with the specified character, if it's shorter than the specified length.
- Use String.prototype.padStart() and String.prototype.padEnd() to pad both sides of the given string.
- Omit the third argument, char, to use the whitespace character as the default padding character.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const pad = (str, length, char = ' ') =>
str.padStart((str.length + length) / 2, char).padEnd(length, char);
console.log(pad('cat', 8));
console.log(pad(String(42), 6, '0'))
console.log(pad('foobar', 3))
Sample Output:
cat 004200 foobar
Pictorial Presentation:
Flowchart:

Live Demo:
See the Pen javascript-basic-exercise-1-38 by w3resource (@w3resource) on CodePen.
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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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