WEBVTT 00:01.330 --> 00:07.550 One of the greatest features that was released in Essex and actually one of my favorites is tablet strength. 00:08.410 --> 00:11.080 It allows us to work with strength in a different way. 00:11.470 --> 00:17.830 As you already know, in iOS five, we use single and double quotes and also in order to concatenate 00:17.830 --> 00:18.940 values, we had to use. 00:18.940 --> 00:25.030 Plus operator, let's recall once again how to deal with strings and gong to create variables. 00:25.750 --> 00:28.810 And let's use your known constant loud declarations. 00:29.320 --> 00:31.480 Creates variable name John. 00:32.820 --> 00:37.920 Then age, which equals to 28. 00:39.700 --> 00:42.040 Then create a third variable profession. 00:44.040 --> 00:45.390 Where the value instructor. 00:47.490 --> 00:53.160 Then create a function which actually will be a simple one, because I just want to remind you how to 00:53.490 --> 00:56.040 work with -- and how to concatenate values. 00:56.730 --> 00:59.180 At first I'm going to use S5 code. 00:59.220 --> 01:01.930 Therefore, let's call this function person. 01:01.950 --> 01:02.280 Yes. 01:04.150 --> 01:05.590 Then run in council. 01:06.980 --> 01:09.590 Some text, right, my name is. 01:11.950 --> 01:13.840 Then plus name. 01:15.980 --> 01:17.990 Plus, again, some text I am. 01:20.260 --> 01:22.090 That plays the variable age. 01:24.620 --> 01:28.250 That plus years old and I am. 01:30.550 --> 01:32.740 And finally, insert here. 01:33.790 --> 01:39.940 Variable profession, so here we use string values which are concatenated to variables, name, age 01:39.940 --> 01:40.650 and profession. 01:41.350 --> 01:43.480 For that we have used several plus size. 01:43.790 --> 01:50.140 Also, each part of string value is surrounded by quotes, but it's the way how we can work with string 01:50.140 --> 01:51.250 values in year five. 01:51.830 --> 01:53.680 OK, let's call this function right. 01:53.680 --> 01:54.820 Person E is five. 01:58.240 --> 01:59.630 So we have in council. 01:59.650 --> 02:07.390 My name is John, I'm 28 years old and I'm instructor, so we got the results, what we needed, but 02:07.390 --> 02:13.540 agreed that we have achieved it kind of hard way because, as we said, we have used several plus science 02:13.540 --> 02:18.340 quotes and so on in order to avoid such inconvenient way of working. 02:18.700 --> 02:21.510 Yes, this allows us to use tablet strength. 02:22.570 --> 02:24.010 Let's see what I'm talking about. 02:24.070 --> 02:27.040 Let's copy this function and paste here. 02:27.940 --> 02:29.830 Also, change the name from. 02:29.830 --> 02:31.600 Yes, five to six. 02:33.530 --> 02:39.920 I'm going to delete this content, which is placed in the log, and now it's time to use new temporary 02:39.930 --> 02:44.100 strengths which are expressed by tactics in most cases. 02:44.120 --> 02:47.830 This key is placed on the left side next to one key on keyboard. 02:48.650 --> 02:52.430 So the first that we want to write here is my name is. 02:54.230 --> 03:01.160 Then we need to place your name variable, but for that we do not need use plus size or adding single 03:01.160 --> 03:02.000 quotes anymore. 03:02.360 --> 03:05.260 Instead of that, we have to write dollar sign. 03:06.480 --> 03:15.880 That open cut the prices in place now variable then simply we have to make space here and right the 03:15.900 --> 03:18.180 next coming tax, which is an. 03:20.240 --> 03:28.360 As I see, we have to place here another variable, so let's do it and the same way use dollar sign, 03:29.150 --> 03:32.660 then curly braces and then age. 03:34.010 --> 03:47.120 Then again, right, text years old and I am and finally place here the variable profession in the same 03:47.120 --> 03:49.420 way with dollar sign and color prices. 03:50.690 --> 03:53.510 So as you see, we didn't use your plus sign. 03:53.690 --> 04:00.440 Also quotes, the entire thing is surrounded by batiks and the variables are placed in color prices 04:00.440 --> 04:02.160 and they are written with dollar signs. 04:03.200 --> 04:05.330 All right, let's invoke this function. 04:08.280 --> 04:15.580 Then reload and you see that we got an exact same result, but again, in more convenient and nice way. 04:16.330 --> 04:18.750 OK, you see here that we have words. 04:18.750 --> 04:19.380 I am. 04:19.380 --> 04:24.620 And suppose that we want to write it with apostrophe for that in is five. 04:24.630 --> 04:26.250 We had to use little Huck. 04:26.700 --> 04:30.330 We just need to use backslash and that single quote. 04:31.450 --> 04:37.140 Reload and see that it works, but in Essex, we can do it in much more simple way. 04:37.660 --> 04:42.850 We don't need any slashes because the string is surrounded by tactics which are absolutely different 04:42.850 --> 04:43.960 characters from codes. 04:44.620 --> 04:47.230 We just need to place your single quotes. 04:49.300 --> 04:52.290 Reload and we got the same result. 04:53.770 --> 04:54.250 All right. 04:55.290 --> 05:01.620 If we want to make line break in year five, we could do that using backslash and an. 05:04.220 --> 05:07.800 So reload and you see that line is broken in two parts. 05:08.330 --> 05:14.930 As for ethics, we can just break the line in code editor using pressing the enter key, which again 05:14.930 --> 05:17.180 is more convenient way to break lights. 05:19.130 --> 05:26.120 OK, so as I see tablet strength, a really great feature of ethics, it makes our lives much easier 05:26.120 --> 05:31.370 as a programmer, actually, I would like to note that if you don't need to concatenate string values 05:31.370 --> 05:35.170 with variables, then you can use a standard SFI way. 05:35.210 --> 05:38.420 I mean, you can declare variables with single or double quotes. 05:39.020 --> 05:42.590 So it's not mandatory to use tactics with variable declarations. 05:43.460 --> 05:43.910 All right. 05:44.210 --> 05:45.680 Let's use some more examples. 05:45.710 --> 05:51.470 I'm going to create a function which will actually calculate years of experience of person. 05:53.150 --> 06:00.290 Suppose that the person has working experience in two companies and we want to get the total sum of 06:00.290 --> 06:06.380 years of experience from both companies, so let's insert here two parameters, company one and. 06:07.510 --> 06:08.380 Company to. 06:11.440 --> 06:14.080 Then inside Kolob racist White Castle log. 06:16.420 --> 06:22.750 So in order to get the some of years of experience, we need to add the years of experience from company 06:22.960 --> 06:27.050 to company to and concatenate this value to string values. 06:27.670 --> 06:27.910 So. 06:27.910 --> 06:28.300 Right. 06:28.780 --> 06:29.470 I have. 06:30.970 --> 06:34.060 Then plus and open parenthesis. 06:35.110 --> 06:39.250 Insert here parameters company one and company to. 06:41.700 --> 06:42.510 Then plus. 06:44.070 --> 06:46.080 Years of experience. 06:49.410 --> 06:50.430 In programming. 06:54.110 --> 07:04.370 Let's invoke dysfunction and also use some arguments, right, for example, four and seven reload. 07:05.450 --> 07:06.510 And of course, it works. 07:07.010 --> 07:07.920 We got the results. 07:07.940 --> 07:10.910 I have 11 years of experience in programming. 07:12.170 --> 07:18.060 All right, let's transform it into ESX version instead of Cote's place here. 07:18.080 --> 07:18.740 Tactics. 07:20.280 --> 07:22.530 Then delete those plus signs. 07:27.250 --> 07:30.970 Surround Company one and company two with Calabrese and. 07:32.900 --> 07:35.390 Also place here, dollar sign. 07:37.740 --> 07:38.550 That's without. 07:39.800 --> 07:45.230 And you can see that we have, again, the same result as he saw at first, the addition was performed 07:45.230 --> 07:50.110 in coal prices and then we got string value, OK? 07:50.750 --> 07:54.470 Besides that, we were able to invoke the function inside collaborationists. 07:55.340 --> 07:59.600 Let's use here the value from person is six function for that. 07:59.600 --> 08:06.050 Let's change this cost of the log into return statement in order to get the value. 08:09.090 --> 08:11.070 Then place here. 08:12.380 --> 08:18.080 Experienced function, dollar sign and inside Calabrese invoke function. 08:19.280 --> 08:20.690 Person is six. 08:24.360 --> 08:26.850 Reload and we have results. 08:27.000 --> 08:31.500 My name is John, I'm 28 years old and I'm instructor. 08:31.800 --> 08:34.980 I have 11 years of experience in programming. 08:36.420 --> 08:37.220 OK, fine. 08:37.710 --> 08:38.860 It's really cool, right? 08:39.450 --> 08:45.630 So, again, templated strengths allow us to avoid using single quotes or double quotes and the relationship 08:45.630 --> 08:48.300 between them, which sometimes becomes really annoying. 08:48.810 --> 08:51.660 Also, we do not need to use classes anymore. 08:52.470 --> 08:52.950 All right. 08:53.340 --> 08:58.290 Before we finish this lecture, I'm going to introduce to you several built in three methods which were 08:58.740 --> 09:00.000 released in ethics. 09:00.420 --> 09:04.020 Those methods, in some cases may be used as powerful and great tools. 09:04.660 --> 09:08.040 The first method that I want to show you is start with method. 09:08.670 --> 09:16.330 So create a variable and call it grid, then assign to it string value. 09:17.340 --> 09:20.610 Hello, my dear students. 09:24.380 --> 09:30.670 Let's say we want to check if this thing value starts with specified character or characters, so for 09:30.680 --> 09:35.340 that we can use starts with matter, which actually returns boolean value, true or false. 09:35.960 --> 09:36.170 So. 09:36.170 --> 09:37.490 Right, Castlewood log. 09:38.620 --> 09:41.740 Grit that starts with. 09:42.800 --> 09:48.110 This matter takes as an argument, character or characters, which we want to check, as you see, our 09:48.110 --> 09:49.680 three value starts with hello. 09:49.700 --> 09:51.310 So let's use this word here. 09:51.320 --> 09:51.620 Right. 09:51.650 --> 09:52.070 Hello. 09:53.940 --> 09:57.020 Reload and we got through it. 09:57.090 --> 09:59.040 All right, hello without capital letter. 10:00.840 --> 10:05.040 Then we will get false because this matter takes into account the sensitivity. 10:06.230 --> 10:12.500 All right, in order to check if string value ends with specified character, we can use and with method 10:12.980 --> 10:16.880 that's duplicated, changed the name of the method. 10:16.890 --> 10:18.320 Right, and with. 10:21.050 --> 10:29.690 That revolt and we have false because this thing doesn't end with hello, let's change it into, for 10:29.690 --> 10:35.210 example, E.A., then you see that we've got through. 10:36.290 --> 10:36.790 All right. 10:37.760 --> 10:43.160 The next method that I want to show you is includes which actually checks if the string value includes 10:43.160 --> 10:49.340 the specified string characters that duplicate it again and change the method. 10:49.670 --> 10:50.090 Right. 10:50.090 --> 10:50.720 Includes. 10:52.280 --> 11:00.830 And as an argument, let's place here, dear, rule the page and you see that we have true because the 11:00.830 --> 11:03.240 work for you is a part of our strength value. 11:04.610 --> 11:11.240 OK, and the last method that I'm going to introduce you is repeat, as the name of this method tells 11:11.240 --> 11:13.830 us, it's obvious that it repeats the string values. 11:14.300 --> 11:23.540 So, for example, if we pass as an argument three, then we will get our string value three times. 11:24.350 --> 11:24.830 All right. 11:25.460 --> 11:28.190 Those methods are very helpful in the real world coding. 11:28.190 --> 11:33.410 So, you know already how they work and I'm sure that you will use them in your future projects. 11:34.270 --> 11:37.730 OK, it was all about strength in ethics. 11:38.310 --> 11:39.110 Let's go ahead.