null_value_checker

no_null_value.js

//var _ = require('underscore');

var goodData = {a: 1, b: 2, c: 3};
var badData = {a: null, b: 1, c: 2};

var noNullValue = function(data, checkKeys){
  // check all keys unless pass an array
  checkKeys = checkKeys || _.keys(data);
  
  // will be something like [true, false, false], true means there is a null value on our checkKeys.
  var resultAry =  _.map(data, function(val, key) { return _.contains(checkKeys, key) && _.isNull(val); });
  
  // if all false, no null value on our checkKeys.
  return  _.all(resultAry, function(val) { return !val; });
};

console.log(noNullValue(goodData));
console.log(noNullValue(badData));
console.log(noNullValue(badData, ["b", "c"]));

no_null_value.rb

good_data = {a: 1, b: 2, c: 3}
bad_data = {a: nil, b: 2, c: 3}

def no_null_value(data, check_keys = nil)
  check_keys ||= data.keys

  result_ary = data.map { |key, val| check_keys.include?(key) && val == nil}

  result_ary.all? { |val| !val; }
end

p no_null_value(good_data)
p no_null_value(bad_data)
p no_null_value(bad_data, ["b", "c"])