TYPESCRIPT

remove item from array if exists in another array

myArray = myArray.filter( function( el ) {
  return !toRemove.includes( el );
} );

remove item from array if exists in another array

myArray = myArray.filter( ( el ) => !toRemove.includes( el ) );

remove item from array if exists in another array

$filteredFoo = array_diff($foo, $bar);

remove item from array if exists in another array

myArray = myArray.filter( function( el ) {
  return toRemove.indexOf( el ) < 0;
} );

Delete array inside another array

// array which holds all values
const namesArr = ["Lily", "Roy", "John", "Jessica"];

// array of values that needs to be deleted
const namesToDeleteArr = ["Roy", "John"];

// make a Set to hold values from namesToDeleteArr
const namesToDeleteSet = new Set(namesToDeleteArr);

// use filter() method
// to filter only those elements
// that need not to be deleted from the array
const newArr = namesArr.filter((name) => {
  // return those elements not in the namesToDeleteSet
  return !namesToDeleteSet.has(name);
});

console.log(newArr); // ["Lily", "Jessica"]