Convert dash-separated string to camelCase?

Question

For example suppose I always have a string that is delimited by \"-\". Is there a way to transform

it-is-a-great-day-today

to

itIsAGreatDayToday

Answer 1

You can match on the word character after each dash (-) or the start of the string, or you could simplify by matching the word character after each word boundary (\b):

function camelCase(s) {
  return (s||'').toLowerCase().replace(/(\b|-)\w/g, function(m) {
    return m.toUpperCase().replace(/-/,'');
  });
}
camelCase('foo-bar'); // => 'FooBar'
camelCase('FOo-BaR-gAH'); // => 'FooBarGah'