Function createPredicateFn

code/songhop/www/lib/angular/angular.js:16658–16681

(expression, comparator, matchAgainstAnyProp)

// Helper functions for `filterFilter`
function createPredicateFn(expression, comparator, matchAgainstAnyProp) {
  var predicateFn;

  if (comparator === true) {
    comparator = equals;
  } else if (!isFunction(comparator)) {
    comparator = function(actual, expected) {
      if (isObject(actual) || isObject(expected)) {
        // Prevent an object to be considered equal to a string like `'[object'`
        return false;
      }

      actual = lowercase('' + actual);
      expected = lowercase('' + expected);
      return actual.indexOf(expected) !== -1;
    };
  }

  predicateFn = function(item) {
    return deepCompare(item, expression, comparator, matchAgainstAnyProp);
  };

  return predicateFn;
}

function deepCompare(actual, expected, comparator, matchAgainstAnyProp) {
  var actualType = typeof actual;