JSON.stringify replacer that sorts object keys

replacer.coffee

replacer = (key, val) ->
  if val instanceof Object
    keys = Object.keys(val).sort().map (key) ->
      "\"#{key}\":#{JSON.stringify val[key], replacer}"

    "{#{keys}}"
  else val

indeed, assuming v8 doesn't change their iteration implementation. i like the use of reduce too (though not a huge fan of coffee syntax for arguments following functions).

@ncr Thanks, that worked for me, but had to add a null check. In regular JS:

function replacer (key, value) {
  if (value == null || value.constructor != Object) {
    return value
  }
  return Object.keys(value).sort().reduce((s,k) => {s[k] = value[k]; return s}, {})
}