1
00:00:00,990 --> 00:00:05,830
Our information is useful because we do not need to do everything.

2
00:00:05,940 --> 00:00:09,890
Plus we have for loops and the cook it looks cleaner.

3
00:00:09,990 --> 00:00:17,430
Let's say we have an array of phone numbers and we want to add every numbers in the array by free.

4
00:00:17,430 --> 00:00:18,330
For example

5
00:00:31,160 --> 00:00:33,690
we just need to simply write like this.

6
00:00:33,710 --> 00:00:35,630
That number will add by fully

7
00:00:58,840 --> 00:00:59,840
piano that we saw.

8
00:00:59,900 --> 00:01:03,020
And as you can see each number is added by free

9
00:01:05,960 --> 00:01:08,260
also we can express these two a function.

10
00:01:08,260 --> 00:01:12,320
So there is not much meaningful.

11
00:01:12,380 --> 00:01:21,290
For example we can add create a pass for function which is equal to number

12
00:01:24,170 --> 00:01:27,840
and each number is added by 4.

13
00:01:27,950 --> 00:01:31,220
And then we create a plus for.

14
00:01:31,460 --> 00:01:33,050
We just need to copy this 1

15
00:01:39,390 --> 00:01:44,620
and then we pass the parts for functions inside the map function.

16
00:01:52,080 --> 00:01:55,150
And then we pin all the numbers.

17
00:01:55,710 --> 00:02:01,570
And as you can see at this time each of the values in a way is at a by 4.

18
00:02:01,590 --> 00:02:05,550
So this is how this map function work in a rate.