xenonhammer

const excludeIds = defaultCass.map(item => item.id);

const result = allCass.filter(item => !excludeIds.includes(item.id));

const result = allCass.filter(function(n) {
  return !this.has(n.id);
}, new Set(defaultCass.map(n => n.id)));

function* diff(data1, data2, key = n => n) {
  const getKey = key instanceof Function ? key : n => n[key];
  const keys = new Set;

  for (const n of data2) {
    keys.add(getKey(n));
  }

  for (const n of data1) {
    if (!keys.has(getKey(n))) {
      yield n;
    }
  }
}

const result = [...diff(allCass, defaultCass, 'id')];

Array.from(diff('abcdE', 'AcD', n => n.toLowerCase())) // ['b', 'E']

for (const n of diff(Array(8).keys(), Array(5).keys())) {
  console.log(n); // 5 6 7
}

//background fill
context.clearRect(0,0,displayWidth,displayHeight);
context.fillStyle = "rgba(0,0,0,0)";
context.fillRect(0,0,displayWidth,displayHeight);

const queryData = [
  {
    fields: {
      TITLE: data.name,
      NAME: data.name,
      PHONE: {
        VALUE: data.phone,
        VALUE_TYPE: "work",
      }
    },
    params: {
      REGISTER_SONET_EVENT: "Y",
    },
  },
];

interface Types {
  TYPE: 'type';
  ANOTHER_TYPE: 'anotherType';
}

type SomeType = {
  [P in Types[keyof Types]]: () => void;
};

const object: SomeType = {
  type: () => {}, 
  anotherType: () => {}
}

var i = 0;
if( (function(){return i%2==0})(i) ){
  console.log(i);
};

return gulp.src(['!./src/less/**/*', './src/**/*', './src/*.html'])

return gulp.src(['!./src/{less,less/**/*}', './src/**/*', './src/*.html'])

return gulp.src(['!./src/less/**/*', './src/**/*', './src/*.html'])

gulp.src(['!./src/less/**/*', './src/**/*', './src/*.html'])

button.addEventListener('click', function (e){
     console.log(i);
});

button.addEventListener('click', (event) => {
     console.log(i);
});