1 00:00:00,650 --> 00:00:01,700 Welcome back. 2 00:00:01,730 --> 00:00:06,920 In this video, let's see how we can upgrade or loop through an object. 3 00:00:07,290 --> 00:00:13,160 Remember, objects are not arrays where we can use for in loop and other ones or other methods to do 4 00:00:13,160 --> 00:00:13,490 it. 5 00:00:13,670 --> 00:00:20,450 But how can we get or how can we loop through in a trade over, I mean, properties of an object. 6 00:00:20,450 --> 00:00:22,100 So let me show you. 7 00:00:22,490 --> 00:00:25,970 So let me comment this one out. 8 00:00:26,000 --> 00:00:27,320 Let me copy this one. 9 00:00:27,320 --> 00:00:30,140 The entire object here and now. 10 00:00:30,140 --> 00:00:32,509 Come down here and let's say that. 11 00:00:34,390 --> 00:00:38,620 I iterating over objects. 12 00:00:40,300 --> 00:00:41,170 Properties. 13 00:00:43,010 --> 00:00:44,330 Let me paste my object here. 14 00:00:44,330 --> 00:00:46,880 So let me remove I think I have the objects here also. 15 00:00:46,880 --> 00:00:48,880 Let me comment this one here. 16 00:00:50,610 --> 00:00:51,670 Great. 17 00:00:51,690 --> 00:00:55,800 So now how can we let me remove the functions inside this? 18 00:00:57,030 --> 00:00:57,750 Great. 19 00:00:57,750 --> 00:01:02,310 So how can we trade over these properties? 20 00:01:02,700 --> 00:01:13,620 We have four ways of iterating over properties of an object, and the first one is using the four in 21 00:01:13,620 --> 00:01:14,130 loop. 22 00:01:15,000 --> 00:01:18,450 So one is using four. 23 00:01:20,130 --> 00:01:22,200 The loop. 24 00:01:22,780 --> 00:01:25,350 Well, these are some of the advanced topics. 25 00:01:25,350 --> 00:01:28,980 Right, but are making us a beginner topic. 26 00:01:28,980 --> 00:01:29,550 Right. 27 00:01:29,670 --> 00:01:30,660 So let's go. 28 00:01:30,960 --> 00:01:38,450 The next method is what you call objects dot keys, objects, dot keys method. 29 00:01:38,460 --> 00:01:41,310 And this one is using the object. 30 00:01:42,790 --> 00:01:45,600 A point number three is objects. 31 00:01:45,640 --> 00:01:47,830 Dot values. 32 00:01:48,820 --> 00:01:53,330 Lastly is going to be object dots. 33 00:01:53,350 --> 00:01:54,400 Entries. 34 00:01:56,280 --> 00:01:56,550 Hmm. 35 00:01:57,090 --> 00:02:02,880 One more time, you will try to revisit this because you may need this logic to be able to solve our 36 00:02:02,880 --> 00:02:03,950 coding challenge. 37 00:02:03,960 --> 00:02:07,650 That's why we are doing us on the basis of JavaScript. 38 00:02:07,650 --> 00:02:10,430 But is advanced topic good? 39 00:02:10,440 --> 00:02:16,110 So what does the let's start with the four in loop for in loop. 40 00:02:17,310 --> 00:02:20,090 So this is the syntax. 41 00:02:20,100 --> 00:02:22,920 So come down here and let's write a syntax. 42 00:02:22,920 --> 00:02:24,210 So a syntax. 43 00:02:26,090 --> 00:02:36,260 Goes like this, we bring in four and then mine in parentheses and then let key in. 44 00:02:37,120 --> 00:02:40,660 E object and as that. 45 00:02:40,870 --> 00:02:43,420 So let's go over again what this property means. 46 00:02:43,720 --> 00:02:46,930 This lad is a must. 47 00:02:47,700 --> 00:02:51,540 But this late is a special keyword to bring us light. 48 00:02:51,780 --> 00:02:56,910 But this key might be anything but normally we use key. 49 00:02:57,150 --> 00:03:01,820 And then in is is a must read is addressed. 50 00:03:01,860 --> 00:03:04,280 And this object can be any object. 51 00:03:04,290 --> 00:03:05,040 So let's see. 52 00:03:05,370 --> 00:03:09,540 The key is a name of the properties of the object. 53 00:03:09,990 --> 00:03:12,210 So here, these are my key. 54 00:03:13,560 --> 00:03:15,080 And these are my values. 55 00:03:15,090 --> 00:03:19,470 So inside this these key represents these keys. 56 00:03:19,470 --> 00:03:21,030 Here you get it. 57 00:03:21,030 --> 00:03:26,370 And then this object represents the object that we are trying to find, which is the person. 58 00:03:26,670 --> 00:03:28,770 So here is going to be what? 59 00:03:29,750 --> 00:03:30,500 Person. 60 00:03:31,170 --> 00:03:33,840 Let's make it as personal objects here. 61 00:03:33,870 --> 00:03:34,380 So let's see. 62 00:03:34,380 --> 00:03:38,040 There is a person up to here going to be as what person object. 63 00:03:38,250 --> 00:03:42,180 So now if I console.log the key. 64 00:03:43,130 --> 00:03:44,360 The key insight. 65 00:03:44,780 --> 00:03:46,070 Now let's see. 66 00:03:46,970 --> 00:03:48,980 So that we have the keys as. 67 00:03:49,430 --> 00:03:50,300 Where is my. 68 00:03:50,340 --> 00:03:50,720 Yeah. 69 00:03:51,200 --> 00:03:51,890 Here we go. 70 00:03:52,190 --> 00:03:56,040 We have the first name. 71 00:03:56,060 --> 00:03:57,200 My key here. 72 00:03:57,230 --> 00:03:58,280 Last name? 73 00:03:58,370 --> 00:03:59,180 H. 74 00:04:00,030 --> 00:04:02,400 View count is married. 75 00:04:02,910 --> 00:04:08,880 Hobbies is admin and started off able to get all my keys. 76 00:04:09,180 --> 00:04:12,450 So what are the use cases here? 77 00:04:13,050 --> 00:04:13,830 Maybe. 78 00:04:13,860 --> 00:04:15,500 Well, it depends. 79 00:04:15,510 --> 00:04:22,760 Sometimes you want to check if there are some URLs, a key or on a certain object. 80 00:04:22,770 --> 00:04:31,800 Otherwise we can add additional key to the object where we can go by using this for a loop to get the 81 00:04:31,800 --> 00:04:39,150 properties of an object that is therefore in loop for you.