WEBVTT 00:08.460 --> 00:11.330 Windows POAs shell supports several. 00:11.340 --> 00:18.510 Come on let's that allow you to assign a well to wearable or manipulate variables. 00:18.530 --> 00:26.030 They are said to wearable new wearable get wearable clear wearable and remove wearable. 00:26.040 --> 00:32.910 Let's start with the saturable Come on let the set wearable command letra why it's an alternative to 00:32.910 --> 00:41.160 the assignment operator described earlier to allow you to assign a value or well used to wearable one 00:41.160 --> 00:45.110 uses to allow wearable assignment in a pipeline. 00:45.300 --> 00:52.150 In addition to common parameterless the saturable come on GLADD supports the following parameters. 00:52.230 --> 00:56.070 Name it specifies the name of the wearable. 00:56.080 --> 00:57.090 Be Insaf. 00:57.150 --> 01:01.270 It is a positional parameter in a position of one. 01:01.290 --> 01:04.060 Well you must be specified here. 01:04.170 --> 01:10.820 Include parameter specifies only items upon which the command left will act. 01:10.950 --> 01:17.950 Exclude parameter specifies those items upon which the command letter will not act. 01:17.970 --> 01:25.920 Scope parameter scope were wearable is to be created which can be named scope. 01:25.950 --> 01:32.820 For example global local's or rescript or number relative to the current scope. 01:32.940 --> 01:40.560 Well your parameter specifies the well you're signed to the unwearable description specifies a user 01:40.560 --> 01:45.460 defined description variable option parameter allowed. 01:45.480 --> 01:53.080 Well yours are known originally that constant private all scope for spring matter. 01:53.100 --> 01:58.310 It specifies that every effort be made to set the variable. 01:58.350 --> 02:04.870 What if parameter is a boolean value that specifies that no action should be taken. 02:04.980 --> 02:13.590 But the user should be shown what would have happened if the command left had executive confirmed parameter 02:13.590 --> 02:14.280 as a boolean. 02:14.280 --> 02:22.740 Whether that's pacifies let the user be asked to confirm their intended action before it is carried 02:22.740 --> 02:31.140 out and pass through parameter specifies that the object created are passed to the next step in the 02:31.140 --> 02:32.110 pipeline. 02:32.250 --> 02:34.810 Let's take a look at the following example. 02:34.860 --> 02:43.390 Let's type the following command to assign the well-you of 2 to variable a set variable. 02:43.430 --> 02:50.460 Name a well-known 20th and pipe it to format list live format list statement displays. 02:50.460 --> 02:55.560 Nothin loses because there is no pass through parameter. 02:55.560 --> 03:03.210 If you get a pass through parameter then information about the variable can be displayed using the format 03:03.210 --> 03:04.320 list statement. 03:04.440 --> 03:06.540 So let's roll the following example. 03:06.570 --> 03:08.010 Set variable name. 03:08.020 --> 03:15.660 A valid 20 pass through description Adem a variable and pipe it to format list. 03:15.660 --> 03:18.620 Next up the new verbal command left. 03:18.620 --> 03:24.330 Then your wearable command creates a new variable in addition to common parameter. 03:24.570 --> 03:25.410 The new variable. 03:25.410 --> 03:28.290 C'mon let's support the following parameters. 03:28.350 --> 03:34.940 Name Well your description option for is passed through scope. 03:34.980 --> 03:41.920 What you can confirm parameters are checked in pretty much the same as in set variable command left. 03:42.090 --> 03:44.210 Except here a parameter. 03:44.220 --> 03:52.230 Well you use a positional parameter in position to and new verbal command LET does not take include 03:52.260 --> 03:59.240 and exclude parameters unlike the saturable command left which supports those parameters. 03:59.250 --> 04:04.800 So let's take a look at the following example the following command creates a new variable. 04:04.830 --> 04:09.890 My new variable but does not assign a value to it. 04:09.990 --> 04:17.670 Since the past through parameter is present the format list statement allows you to see that the variable 04:17.670 --> 04:20.960 exists but has no well your set. 04:21.000 --> 04:25.640 The command looks like this new variable name new. 04:25.680 --> 04:27.710 My new variable pass through. 04:27.710 --> 04:32.390 Pipe it to ferment format list some verse about GET variable command come. 04:32.500 --> 04:39.570 Let get a variable command let allows you to retrieve a Venter's partial variable to get a variable 04:39.570 --> 04:40.020 command. 04:40.040 --> 04:42.860 Let's support the following parameters. 04:42.960 --> 04:51.300 In addition to the common parameters name specifies the name of the variable accepts wildcard characters. 04:51.390 --> 04:59.430 Well you're only a boolean value if present then only the value of the variable is passed to all the 04:59.430 --> 05:00.340 pipeline. 05:00.480 --> 05:09.650 Include parameter if present specifies which variables to include qualifiers well of the name parameter 05:09.980 --> 05:17.600 and exclude parameter if present specifies which wearables to exclude qualifies the value of the name 05:17.600 --> 05:23.270 perimeter and scope parameter it specifies the scope of the variable. 05:23.390 --> 05:30.050 Let's take a look at the following example which is showing the creation of four variables variable 05:30.110 --> 05:34.730 a while two is three and a four legged variable. 05:34.750 --> 05:43.440 Command line is used to retrieve and display information about the variables a VOM a 2 and a 4. 05:43.580 --> 05:52.340 So first let's stop these commands to create the wearables variable avionic will stand a to twenty three 05:52.590 --> 05:55.400 thirty and a four for two. 05:55.550 --> 06:03.260 Now let's Taieb this command to retrieve the previously mentioned variables get variable dush name a 06:03.590 --> 06:11.800 star does include a and one to four in square brackets and pipe it to for my list. 06:11.810 --> 06:18.370 If you run this command the information on the three desired variables will be display there well you're 06:18.380 --> 06:19.090 over there. 06:19.100 --> 06:28.490 Include parameter is a regular expression part or the character class 1 to 4 in square brackets matches 06:28.580 --> 06:32.270 a single character which is contained in the class. 06:32.350 --> 06:43.100 That's the variables A want a 2 and a for match but a 3 does not match since 3 isn't contained in the 06:43.100 --> 06:44.390 character class. 06:44.390 --> 06:49.580 Notice that the variables are not by default ordered by name. 06:49.610 --> 06:57.370 If you wanted to sort them by name you would need to add a pipeline stamp using the sort object command 06:57.400 --> 06:57.990 left. 06:58.010 --> 06:59.990 So let's type the following command. 07:00.080 --> 07:03.280 Get variable name a asterisk. 07:03.280 --> 07:13.010 This include a one to four in square brackets and pipe it to sort object name and pipe it to form at 07:13.010 --> 07:18.280 least more you'll get the output sorted by name. 07:18.290 --> 07:24.900 The clear verbal command left it clears the way olio of one or more variables. 07:25.010 --> 07:31.230 In addition to common parameters the clear variable C'mon let's support the following parameters. 07:31.250 --> 07:37.170 Name include exclude for this scope Wotif conform. 07:37.310 --> 07:44.150 Let's take a look at the following example which demonstrates clear in the wealth of specified variables 07:44.260 --> 07:50.760 will clear the values of the variable a while a two ways three and a four. 07:50.820 --> 07:53.980 Created in the preceding example. 07:54.020 --> 08:00.110 First show that the four variables exist and have a value set. 08:00.110 --> 08:10.550 Using this command get a variable name a asterisk in does include a and one two three four square brackets 08:10.550 --> 08:18.260 and pipe it to form at least certain certain by name and well you can see that they are existent. 08:18.290 --> 08:22.410 Next let's clear the value of three of those variables. 08:22.440 --> 08:25.790 Using this command the value of variable. 08:25.870 --> 08:27.450 3 is not clear. 08:27.560 --> 08:32.480 So let's type clear wearable Desch name a asterisk. 08:32.510 --> 08:36.770 This include a 1 to 4 in square brackets. 08:36.770 --> 08:42.980 Now let's check to see that the values of those variables have been clear to you that the command get 08:42.980 --> 08:44.480 a variable name. 08:44.510 --> 08:54.410 Asterisk include a 1 2 3 4 in square brackets and to form format list format and by name and well as 08:54.410 --> 08:59.670 you can see the value of each of the three variables has been cleared. 08:59.690 --> 09:04.620 Now some votes about remove variable command left as it comes from the name. 09:04.640 --> 09:07.880 It removes one or more existing variables. 09:07.880 --> 09:12.860 It supports the foreign parameters in addition to the common parameter name. 09:12.980 --> 09:18.350 Include exclude force scope whatever and conform. 09:18.360 --> 09:24.770 Let's take a look at some examples and therefore following example will delete the variable a while 09:24.780 --> 09:26.750 made 2 and 3. 09:26.780 --> 09:34.500 If you are unsure of the effort of using a remove variable command you can use the Wattie of parameter 09:34.710 --> 09:35.880 as in the pursuit. 09:35.880 --> 09:44.750 An example will use for variables a one a two is three and a four to explore removing the three desired 09:44.780 --> 09:49.980 variables with the protection of their What-If perimeter. 09:50.090 --> 09:54.040 You can type the following command to remove variable name. 09:54.110 --> 10:03.070 Include a one two three in square brackets and mention what parameter and you'll see that there are 10:03.080 --> 10:10.260 three variables there would have been removed if there were remoter hadn't been used since. 10:10.300 --> 10:18.350 Lose the variables you want to dilute remove the What-If Barometer from the command and press center. 10:18.350 --> 10:27.810 Now if you type get variable Desch name a asterisk does include a one to four in square brackets. 10:27.920 --> 10:32.240 You can confirm that only a four exists.