Building strings

example.js

// String concatenation

var stringBuilder = '';

for (var i = 0, len = 30; i < len; i++) {
  stringBuilder += 'word' + i;
}

console.log(stringBuilder);

// Array joining, faster in some browsers

var stringBuilder = [];

for (var i = 0, len = 30; i < len; i++) {
  stringBuilder.push('word' + i);
}

console.log(stringBuilder.join(''));