Array.Filter

Question 1

let results = arr.filter(function(____ , ______ , ________) {

});

Answer 1

element, index, array

Question 2

var words = [‘spray’, ‘limit’, ‘elite’, ‘exuberant’, ‘destruction’, ‘present’];

const result = words.filter(word => word.length > 6);

console.log(result);
// expected output:

Answer 2

Array [“exuberant”, “destruction”, “present”]

Question 3

Using the filter method on the years array, return an array of only the years in the twentieth century (remember: the twentieth century includes the year “2000”).

const years = [1989, 2015, 2000, 1999, 2013, 1973, 2012];
let century20;

Answer 3

century20 = years.filter( year => year >= 2000 );

console.log(century20);

Question 4

what 3 elements of .Filter() are optional?

Answer 4

indexOptional
arrayOptional
thisArgOptional

Question 5

function isBigEnough(value) {
  return value >= 10;
}

var filtered = [12, 5, 8, 130, 44].filter(isBigEnough);
// filtered is

Answer 5

[12, 130, 44]

Question 6

function isBigEnough // code

var filtered = [12, 5, 8, 130, 44].filter(isBigEnough);
// filtered is [12, 130, 44]

Answer 6

(value) {
return value >= 10;
}

Question 7

var arr = [1,2,true,4,{"abc":123},6,7,{"def":456},9,[10]]
var res = \_\_\_\_\_\_\_\_\_\_ // [1, 2, true, 4, 6, 7, 9, Array[1]]

Answer 7

arr.filter(Number);

Question 8

console.log(1 == true);

Answer 8

true

Question 9

console.log(1 === true);

Answer 9

false

Question 10

var words = [‘spray’, ‘limit’, ‘elite’, ‘exuberant’, ‘destruction’, ‘present’];

const result = words.filter// return a word greater than 6 characters

console.log(result);
// expected output: Array ["exuberant", "destruction", "present"]

Answer 10

(word => word.length > 6);

Question 11

const userNames =['Steve', 'mike', 'Same'];
const user = userNames

//filter names with S

Answer 11

(name=> name.charAt(0) === “s”)