let arr = ['key', 'car', 'select'];

const items = ['a', 'b', 'c', 'd', 'e', 'f']
const valueToRemove = 'c'
const filteredItems = items.filter(item => item !== valueToRemove)

var arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0];

for( var i = 0; i < arr.length; i++){ 
   if ( arr[i] === 5) {
     arr.splice(i, 1); 
   }
}

//=> [1, 2, 3, 4, 6, 7, 8, 9, 0]

var arr = [5, 15, 110, 210, 550];
    var index = arr.indexOf(210);
 
    if (index > -1) {
       arr.splice(index, 1);
    }

var arr = [1, 2, 3, 4, 'car', 5, 6, 7, 8, 9, 0];

for( var i = 0; i < arr.length; i++){ 
   if ( arr[i] === 'car') {
     arr.splice(i, 1); 
   }
}

console.log(arr);