Optimizing in JS
You never stop learning is not just a phrase, it is something I live everyday. Today, I was just trying out my skills with JS and was solving an innocuous problem, in JS.
Pangram: A pangram is a sentence using every letter of the alphabet at least once.
E.g. The quick brown fox jumps over the lazy dog.
Like every old school programmer I was trying to solve it in the easiest of ways without breaking a sweat and the first version I could come up with was as under.
// Define an string of all Alphabets.
export const ALPHABETS = "abcedfghijklmnopqrstuvwxyz";
// isPangram allows you input a string to be validated for Pangram
export const isPangram = (pangram) => {
if(pangram == null || pangram.length == 0) {
return false;
}
pangram = pangra.toLowerCase();
var x;
for (x in ALPHABETS){
if( pangram.indexOf(ALPHABETS[x]) >= 0) {
continue;
} else {
return false;
}
}
return true;
};So v1 was not much fat code, I was thinking but then the geek in me was trying to ask can it be simplified further? Optimized in a way it looks cool? and so started my struggle to better the version 1, I had just written.
Problem 1: How to generate the character set
So I thought, instead of having a simple constant string, how about I make it a function to first generate an Array that has all the characters from English; all from A … Z. (Some helpful link)
Array.from({length: 26}, (_, i) => { String.fromCodeCode(97 + i)});How I used it was like this.
const Alphabets = () => Array.from({length:26}, (_, i) =>String.fromCharCode(97+i));Now, after having this Array it was time to look for the ‘Pangram’ in the string. Another method every() and includes() came to the rescue.
V2.0
// isPangram allows you to look for Pangram.
export const isPangram = (pangram) => {
var alphabets = Alphabets();
var lowerCase = pangram.toLowerCase();
return alphabets.every( character=>lowerCase.includes(character));
};and Voila, I think made a better version from what I had at v1.0.
– The – End –