WEBVTT 00:01.450 --> 00:01.990 Hi everyone. 00:01.990 --> 00:03.340 Welcome back to this tutorial. 00:03.340 --> 00:10.360 In this tutorial we will code and explore the limit and skip function using the streams API. 00:10.390 --> 00:14.230 These two functions helps to create a sub stream. 00:14.230 --> 00:18.580 Basically, if you take a look at the limit, it takes in an input. 00:19.060 --> 00:26.230 If you pass the input as five, let's say you have a list of ten elements and then you are passing the 00:26.230 --> 00:28.900 input value for the limit function as five. 00:28.990 --> 00:36.580 Basically what it is going to do, it is just going to perform any kind of operation on the first five 00:36.580 --> 00:37.300 elements. 00:37.300 --> 00:41.590 Even though you have the stream which has ten elements in it. 00:42.040 --> 00:43.300 Let's talk about Skip. 00:43.300 --> 00:46.840 Skip skips the N number of elements from the stream. 00:46.840 --> 00:52.570 So what it is going to do, let's say you have a stream which has ten elements and then you provide 00:52.570 --> 00:54.610 the value as a skip of three. 00:54.640 --> 01:01.000 What it is going to do, it is going to skip the first three elements and process only the remaining 01:01.100 --> 01:02.260 seven elements. 01:02.270 --> 01:03.770 Let's go ahead and code this one. 01:05.870 --> 01:09.560 So we want to create a class for this purpose. 01:09.980 --> 01:14.630 Going to be streams limit skip example. 01:16.620 --> 01:20.580 I'm going to make this class executable by adding public static void main. 01:20.700 --> 01:22.500 Let's put this in presentation mode. 01:25.850 --> 01:27.620 And what we are going to do. 01:28.840 --> 01:30.400 Builder input list first. 01:32.270 --> 01:34.040 List of integers. 01:35.040 --> 01:36.410 Want to keep it simple. 01:37.010 --> 01:39.620 My list is going to hold five elements. 01:40.100 --> 01:43.730 I'm going to use a same set of input that we used in the previous tutorial. 01:44.030 --> 01:49.010 Arrays dot as list of six, seven, eight, nine and ten. 01:50.300 --> 01:50.710 Okay. 01:50.720 --> 01:56.360 Now the first step is we will code and explore the limit function as part of the streams API. 01:57.630 --> 01:59.470 Want to use the same reduce operation. 01:59.470 --> 02:05.950 What I'm going to do, I'm going to perform the summation of part of the stream from this list. 02:08.240 --> 02:10.790 I'm going to use the same reduce operation. 02:10.790 --> 02:11.480 So. 02:12.950 --> 02:16.430 When to pass the return the value as integer. 02:16.970 --> 02:18.680 Here it's going to be limit. 02:21.060 --> 02:25.830 For thus going to accept the list of integers as an input. 02:27.680 --> 02:28.430 In here. 02:28.430 --> 02:35.240 Let's create a stream first dot stream, and then I'm going to use a limit. 02:35.420 --> 02:38.300 So if I pass the value as two. 02:39.240 --> 02:45.720 Write what it is going to do is it is just going to consider these two elements and then perform the 02:45.720 --> 02:46.770 reduce operation. 02:47.220 --> 02:48.300 So reduce. 02:49.300 --> 02:51.100 I'm not going to assign a default values. 02:51.100 --> 02:53.830 It's going to be X comma, Y. 02:57.270 --> 03:00.960 Return A plus B write basically X plus Y. 03:03.740 --> 03:05.210 And then I'm going to return this. 03:06.030 --> 03:09.540 So here the stream is going to. 03:12.570 --> 03:15.840 Six, seven, eight. 03:17.070 --> 03:18.450 Nine and ten. 03:18.600 --> 03:24.870 Since we have the limit function here, it is going to just restrict only these two elements passed 03:24.870 --> 03:27.570 to the reduce function and then return the result. 03:28.170 --> 03:29.460 Go ahead and check the result. 03:30.520 --> 03:37.270 The result is going to be optional of integer and it's going to be limit result. 03:39.420 --> 03:41.700 Equal to the MIT. 03:42.800 --> 03:44.120 And pass the integers. 03:44.330 --> 03:45.080 Right. 03:45.270 --> 03:46.520 So if. 03:47.720 --> 03:50.030 Limit result Dot is present. 03:50.870 --> 03:51.470 Then. 03:53.100 --> 03:53.670 The short. 03:55.100 --> 03:58.160 The limit result is. 03:59.240 --> 04:02.390 Going to be limit result dot. 04:04.270 --> 04:05.530 And else. 04:06.910 --> 04:07.600 Going to be. 04:07.630 --> 04:08.730 No input is past. 04:12.110 --> 04:12.380 Okay. 04:13.040 --> 04:14.150 Let's go ahead and run this. 04:15.330 --> 04:17.850 So let's revisit this code again. 04:17.880 --> 04:19.800 Here we are passing a stream. 04:19.800 --> 04:25.890 We know the stream is going to have five elements and we are using the limit function to limit the stream 04:25.890 --> 04:29.310 to just process the two elements in this in the string. 04:29.630 --> 04:32.130 So let's go ahead and run this check the result. 04:32.550 --> 04:33.210 There we go. 04:33.210 --> 04:34.230 The result is 13. 04:34.260 --> 04:36.240 If I change this value to three. 04:37.150 --> 04:38.440 It is going to. 04:40.380 --> 04:44.670 Perform the summation of these three, then the result is going to be 21. 04:44.880 --> 04:47.730 So this is a benefit of a limit. 04:47.880 --> 04:53.460 So if you have a use case where you have a stream of like 1000 elements and you do not want to process 04:53.460 --> 04:59.010 all the thousand elements to get your result, in that case, you can limit the number of elements you 04:59.010 --> 05:02.100 want from the actual stream using the limit function. 05:02.220 --> 05:07.550 Now what I'm going to do, I'm going to create the skip function. 05:07.560 --> 05:09.570 Basically, we are going to explore the skip function. 05:09.570 --> 05:12.270 I'm going to copy this and then put it here. 05:12.930 --> 05:14.250 Name this one as Skip. 05:15.560 --> 05:17.270 In the place of limit. 05:17.270 --> 05:18.380 I'm going to use a skip. 05:18.830 --> 05:20.730 What the skip is going to do. 05:20.750 --> 05:24.980 So in here, I'd like to write this since we are using three, it's going to pass. 05:25.280 --> 05:26.780 Six, seven, eight. 05:28.290 --> 05:32.010 Okay, so here we have the value of Skip S3. 05:32.310 --> 05:35.390 Basically, it is going to skip six, seven, eight. 05:35.400 --> 05:40.170 The first three elements will be skipped and then it is going to pass only the nine and ten. 05:41.340 --> 05:43.140 So run this. 05:45.400 --> 05:48.250 Gonna name this one as skip result. 05:50.240 --> 05:57.020 It features in Brazil's dot is present a result dot get. 05:58.040 --> 05:59.210 And this skip. 06:00.260 --> 06:03.050 Now let's revisit this code again. 06:03.050 --> 06:09.890 So the stream has five elements and then we are using the skip function and we are providing a value. 06:09.890 --> 06:17.930 So this is a value which is a key to process only the remaining two elements and skip the first three 06:17.930 --> 06:18.920 elements in the stream. 06:18.920 --> 06:21.770 So the result that we are expecting is going to be 19. 06:21.800 --> 06:24.590 Let's go ahead and run this to avoid some confusion. 06:24.590 --> 06:29.900 I'm going to comment this piece of the logic which has the limit result in it. 06:32.750 --> 06:33.380 And thus. 06:34.520 --> 06:36.800 If you run this, the result is going to be 19. 06:36.830 --> 06:38.800 If I change this value to two. 06:39.050 --> 06:45.620 Going to just skip the first two elements and the result is going to be 19 plus eight, which is going 06:45.620 --> 06:46.550 to be 27. 06:48.550 --> 06:50.530 You go put it back. 06:51.400 --> 06:51.790 You. 06:53.250 --> 06:58.630 The skip function can be used if you want to skip a few elements from the stream and process the remaining 06:58.630 --> 07:00.460 elements in the stream. 07:01.670 --> 07:03.050 This is all about a limit. 07:03.050 --> 07:05.870 And skip with this, we came to the end of this tutorial. 07:05.900 --> 07:07.010 Thank you for watching.