small collection of string/object coffeescript utilities

util.coffee

String::endswith   = (str) -> @match new RegExp "#{str}$"
String::startswith = (str) -> @match new RegExp "^#{str}"

String::splitLines = () -> @split /\r\n|\r|\n/

# not unlike jQuery.extend.
# adds new properties in object to target.
# does not override anything any target properties.
# TODO: test!
exports.extend = (target, object) ->
  for key, val of object
    target[key] ?= object[key]

exports.objectKeySize = (obj) ->
  size = 0
  size++ for key of obj when obj.hasOwnProperty key
  size