Posted on Feb 6, 2018 • Edited on May 30, 2018

One life saving Javascript Tip

Always Exit Early !

function mostComplicatedFunction(data) { if (!data) { return; // << Always exit early whenever you can! } // Bang Bang! var {words, ii, position, word, current, sentence} = data; /** * @default 100 */ num_words = num_words || 100; words = [LoremIpsum.WORDS[0], LoremIpsum.WORDS[1]]; num_words -= 2; for (ii = 0; ii < num_words; ii++) { position = Math.floor(Math.random() * LoremIpsum.WORDS.length); word = LoremIpsum.WORDS[position]; if (ii > 0 && words[ii - 1] === word) { ii -= 1; } else { words[ii] = word; } } sentences = []; current = 0; while (num_words > 0) { sentence_length = this.getRandomSentenceLength(); if (num_words - sentence_length < 4) { sentence_length = num_words; } num_words -= sentence_length; sentence = []; for (ii = current; ii < current + sentence_length; ii++) { sentence.push(words[ii]); } sentence = this.punctuate(sentence); current += sentence_length; sentences.push(sentence.join(" ")); } return sentences.join(" "); }

Top comments (5)

Kushan Joshi • Feb 6 '18

This early exit post was inspired by the countless number of functions I have seen which do something inside knees deep { { { brackets.

// Comparison function early(data) { if (!data) { return data; } return data.map(r => r .split(',') .join('-') .slice(1) ); } function late(data) { if (data) { return data.map(r => r .split(',') .join('-') .slice(1) ); } else { return data; } }