var ar = [1, 2, 3, 4, 5, 6];

ar.length = 4; // set length to remove elements

console.log( ar ); //  [1, 2, 3, 4]

var ar = [1, 2, 3, 4, 5, 6];

ar.pop(); // returns 6

console.log( ar ); // [1, 2, 3, 4, 5]

var ar = ['zero', 'one', 'two', 'three'];

ar.shift(); // returns "zero"

console.log( ar ); // ["one", "two", "three"]

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

var removed = arr.splice(2,2);

/*

removed === [3, 4]

arr === [1, 2, 5, 6, 7, 8, 9, 0]

*/

["bar", "baz", "foo", "qux"]

list.splice(0, 2)

// Starting at index position 0, remove two elements ["bar", "baz"] and retains ["foo", "qux"].

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

var filtered = array.filter(function(value, index, arr){

    return value > 5;

});

//filtered => [6, 7, 8, 9]

//array => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]

var array = [1, 2, 3, 4];

var evens = _.remove(array, function(n) {

  return n % 2 === 0;

});

console.log(array);

// => [1, 3]

console.log(evens);

// => [2, 4]

function arrayRemove(arr, value) {

   return arr.filter(function(ele){

       return ele != value;

   });

}

var result = arrayRemove(array, 6);

// result = [1, 2, 3, 4, 5, 7, 8, 9, 0]

var ar = [1, 2, 3, 4, 5, 6];

delete ar[4]; // delete element with index 4

console.log( ar ); // [1, 2, 3, 4, undefined, 6]

alert( ar ); // 1,2,3,4,,6

var ar = [1, 2, 3, 4, 5, 6];

//do stuff

ar = [];

//a new, empty array!

var arr1 = [1, 2, 3, 4, 5, 6];

var arr2 = arr1;  // Reference arr1 by another variable

arr1 = [];

console.log(arr2); // Output [1, 2, 3, 4, 5, 6]

var ar = [1, 2, 3, 4, 5, 6];

console.log(ar); // Output [1, 2, 3, 4, 5, 6]

ar.length = 0;

console.log(ar); // Output []

var ar = [1, 2, 3, 4, 5, 6];

console.log(ar); // Output [1, 2, 3, 4, 5, 6]

ar.splice(0, ar.length);

console.log(ar); // Output []

var ar = [1, 2, 3, 4, 5, 6];

console.log(ar); // Output [1, 2, 3, 4, 5, 6]

  while (ar.length) {

    ar.pop();

  }

console.log(ar); // Output []