How to find multiple string items in an array and delete the string that matches the search and return the count of the array?

Question

var stringsToSearch = ["cat", "dog", "rat"];
fromThisArray = ["rabbit", "snake", "cow", "cat", "dog"];

If stringToSearch is found in fromThisArray, It should delete those strings and return the count of the array.

Similar question were asked in this forum but they are finding single string but my requirement was to search multiple string and delete those string.

Answer 1

By using filter and indexOf

var stringsToSearch = ["cat", "dog", "rat"];

var fromThisArray = ["rabbit", "snake", "cow", "cat", "dog"];

var filteredArray = fromThisArray.filter(function(item){
  return stringsToSearch.indexOf(item) < 0;
});

console.log(filteredArray);

Answer 2

var stringsToSearch = ["cat", "dog", "rat"];
var fromThisArray = ["rabbit", "snake", "cow", "cat", "dog"];

for(var i=0; i<stringsToSearch.length; i++){
    var idx = fromThisArray.indexOf(stringsToSearch[i]);
    if(idx > -1){
        fromThisArray.splice(idx, 1);
    }   
}

console.log(fromThisArray, fromThisArray.length);

Answer 3

function uniqueCount(arr, stringsToSearch ){

  for(var i = 0; i < stringsToSearch.length ; i++){
    while(arr.indexOf(stringsToSearch[i])> -1){
       arr.splice(i,1);//remove
    }
  }
  return arr.length;
}

var stringsToSearch = ["cat", "dog", "rat"];
var fromThisArray = ["rabbit", "snake", "cow", "cat", "dog"];

//call the function 
console.log(uniqueCount(fromThisArray , stringsToSearch ));