Basic 2

Question 1

do two lines without template strings (es5) and both methods.

Answer 1

html = ‘<ul><li>Name: ‘ + name + ‘</li><li>Age: ‘ + age + ‘ </li><li>Job: ‘

html = ‘<ul>’ +
‘<li>Name: ‘ + name + ‘</li>’ +
‘<li>Age: ‘ + age + ‘</li>’ +</ul></li></ul>

Question 2

The formula of template strings (es6)

Answer 2

html = `
<ul>
  <li>Name: ${name}</li>
  <li>Age: ${age}</li>
</ul>
`;

Question 3

What you can do in (es6 template)?

Answer 3

You can do expressions, show functions, and add if statements as well.

Question 4

what it’s the console.log for html document?

Answer 4

document.body.innerHTML = html

Question 5

what arrays can do ?

Answer 5

they allow to store multiple values in one value, they can be muted and the can be used in some really complex alghoritmens

Question 6

What are the 2 ways of creat an array? show the formula.

Answer 6

const numbers = [43,56,33,23,44,36,5];
const numbers2 = new Array(22,45,33,76,54);

Question 7

What kind of information can be within an array?

Answer 7

const mixed = [ 22, ‘Hello’, true, undefined, null, {a:1, b:1}, new Date()];

Question 8

Type the formulas for:

• Get array length
• Check if is array
• Get single value
• Find index of value
• Add on to end
• Add on to front
• Take off from end
• Take off from front
• Splice values
• Reverse
• Concatenate array
• Sorting arrays

Answer 8

val = numbers.length;
val = Array.isArray(numbers);
val = numbers[3];
val = numbers.indexOf(36);
numbers.push(250);
numbers.unshift(120);
numbers.pop();
numbers.shift();
numbers.splice();
numbers.reverse();
val = numbers.concat(numbers2);
val = fruit.sort();

Question 9

What is the ‘COMPRE FUNCTION’ formula ?

Answer 9

val = numbers.sort(function(x, y){
return x - y;
});

Question 10

What is the ‘FIND function formula?

Answer 10

Find
function under50(num){
  return num < 50;
}

val = numbers.find(under50)