UIZE JavaScript Framework

TO DO - Uize.Util.Conformer

This is a proposal document for a Uize.Util.Conformer module.

NOTE: How does this module relate to the proposed Uize.Conformer module? Does this module subsume that module?

1. Examples of Usage

conformer:Uize.Util.Conformer.oneOf (['auto','always'],'auto')

conformer:Uize.Util.Conformer.oneOf (['auto','always']),
noSetIfConformed:true

Uize.Util.Conformer.oneOf (['auto','always'],'auto')
Uize.Util.Conformer.oneOf (['auto','always'],'auto') (blah)

Uize.Util.Conformer.string ()
Uize.Util.Conformer.bool ()

2. - chaining conformers

Uize.Util.Conformer.chain (
  Uize.Util.Conformer.string (),
  Uize.Util.Conformer.oneOf (['auto','always'],'always')
)

Uize.Util.Conformer.chain (
  'string',
  ['oneOf',['auto','always'],'always']
)

3. Example Implementations

function _bool (_value) {return !!(typeof _value == 'object' && _value ? _value.valueOf : _value)}
_package.bool = function () {return _bool};

var _trueValuesMap = {1:1,TRUE:1,ON:1,YES:1};
function _switchBool (_value) {
  if (typeof _value == 'object' && _value)
    _value = _value.valueOf ()
  ;
  return (
    typeof _value == 'boolean'
      ? _value
      : (_value = (_value + '').toUpperCase ()) == '1' || _value == 'TRUE' || _value == 'ON' || _value == 'YES'
  );
}
_package.switchBool = function () {return _switchBool};

function _string () {return _value + ''}
_package.string = function () {return _string};

function _number (_value) {return +_value}
_package.number = function () {return _number};

_package.range = function (_minValue,_maxValue) {
  return function (_value) {Uize.constrain (_value,_minValue,_maxValue)};
};

_package.oneOf = function (_values,_default) {
  if (_default == _undefined) _default = _values [0];
  var _valuesLookup = {};
  for (var _valueNo = -1, _valuesLength = _values.length; ++_valueNo < _valuesLength;)
    _valuesLookup [_values [_valueNo]] = 1
  ;
  _valuesLookup.toString = _valuesLookup.valueOf = 0;
  return function (_value) {_valuesLookup [_value] ? _value : _default};
};