Difference between revisions of "PERL/C2/Array-functions/Gujarati"
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| − | | | + | | અને ''' pop function''' ના છેલ્લા પોઝીશન પરથી એલિમેન્ટ કાઢી નાખ્યા. |
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Revision as of 13:49, 7 October 2014
| Time | Narration |
| 00:01 | પર્લમા Array Functions પરનાં સ્પોકન ટ્યુટોરીયલમાં સ્વાગત છે. |
| 00:06 | આ ટ્યુટોરીયલમાં, આપણે પર્લમા Array functions વિશે શીખીશું જેમ કે, |
| 00:11 | push |
| 00:11 | pop |
| 00:12 | shift |
| 00:14 | unshift |
| 00:15 | split |
| 00:16 | splice |
| 00:17 | અને join |
| 00:18 | sort |
| 00:19 | qw |
| 00:20 | હું વાપરી રહ્યી છું ઉબુન્ટુ લીનક્સ 12.04 ઓપરેટીંગ સીસ્ટમ અને પર્લ 5.14.2 |
| 00:28 | તેમજ હું gedit ટેક્સ્ટ એડીટર પણ વાપરીશ. |
| 00:32 | તમે તમારા પસંદનું કોઈપણ ટેક્સ્ટ એડીટર વાપરી શકો છો. |
| 00:36 | તમને પર્લમાં વેરીએબલો , ડેટા સ્ટ્રક્ચરો, અને એરેની સામાન્ય જાણકારી હોવી અનિવાર્ય છે. |
| 00:43 | Comments, loops અને conditional statements નું જ્ઞાન હોવું ફાયદાકારક નીવડશે. |
| 00:48 | સ્પોકન ટ્યુટોરીયલ વેબસાઈટ પર સંદર્ભિત સ્પોકન ટ્યુટોરીયલોનો સંદર્ભ લો. |
| 00:54 | પર્લ અમુક ઇનબિલ્ટ ફંક્શન પૂરી પાડે છે |
| 00:57 | આ ફંક્શન એરે પર વિવિધ ક્રિયા કરી શકે છે. |
| 01:02 | પ્રથમ એરેના છેલ્લા પોઝીશન પર એલિમેન્ટ ઉમેરવા ને કાઢવા વિષે શીખીશું. |
| 01:08 | આ કરવા માટે આપણી પાસે છે. |
| 01:10 | push function જે એરેના છેલ્લા પોઝીશન પર એલિમેન્ટ ઉમેરશે. |
| 01:15 | અને pop function ના છેલ્લા પોઝીશન પરથી એલિમેન્ટ કાઢી નાખ્યા. |
| 01:21 | Let us understand push and pop functions by using a sample program. |
| 01:26 | Open the terminal and type gedit perlArray dot pl space ampersand |
| 01:33 | And Press Enter |
| 01:36 | This will open perlArray dot pl file in gedit. |
| 01:41 | Type the code as shown on the screen |
| 01:45 | Here, we have declared an Array of length 3. |
| 01:50 | push function will insert an element at the last position of this Array i.e after 3; |
| 01:57 | whereas, pop function will remove an element from the last position of the Array. |
| 02:04 | In our case, 4 will be removed from the Array. |
| 02:08 | Press Ctrl + S to save the file. |
| 02:11 | push function takes 2 arguments- |
| 02:14 | 1st argument to the push function, is the Array in which to add an element. |
| 02:20 | 2nd argument is the element which is to be pushed into the Array. |
| 02:25 | The syntax of pop function is as follows - |
| 02:29 | pop function takes only one argument |
| 02:32 | It is the Array from which an element needs to be removed. |
| 02:36 | Note: Both these functions work at last position of an Array. |
| 02:41 | The element removed by pop function can be collected into another variable. |
| 02:46 | The syntax for this is $variable space = space pop open bracket @myArray close bracket |
| 02:57 | Now switch to the terminal and execute the Perl script. |
| 03:01 | Type perl perlArray dot pl and press Enter. |
| 03:07 | The output is as shown on the terminal. |
| 03:11 | Now, let us see how to add/remove an element from the 1st position of an Array. |
| 03:18 | This can be achieved using- |
| 03:20 | unshift function - which adds an element to an Array at the 1st position |
| 03:25 | shift function - which removes the first element from an Array. |
| 03:31 | Let us understand this using a sample program. |
| 03:35 | I will open perlArray dot pl file which I have already created. |
| 03:39 | Type the following piece of code as shown on the screen. |
| 03:43 | unshift function will insert an element at the first position i.e before 1 |
| 03:52 | shift function will remove an element from the first position. |
| 03:57 | In our case, zero will be removed. |
| 04:00 | Press Ctrl + S to save the file. |
| 04:03 | The unshift function takes 2 arguments - |
| 04:06 | 1st argument is the Array in which to add an element |
| 04:10 | 2nd argument is the element to be added into the Array |
| 04:15 | shift function takes only one argument - |
| 04:18 | This is the Array from which the element needs to be removed. |
| 04:22 | Note: Both these functions works at first position of an Array. |
| 04:27 | We can collect the element removed by shift function into some variable. |
| 04:33 | This syntax for this is - $variable space = space shift open bracket @myArray close bracket |
| 04:44 | Then switch to the terminal and execute the Perl script. |
| 04:48 | Type perl perlArray dot pl and press Enter. |
| 04:54 | The output displayed on the terminal is as highlighted. |
| 04:59 | Now, let us see how to remove an element from a specified position of an Array. |
| 05:05 | splice function removes an element from a specified position of an Array. |
| 05:11 | The return value of this function is an Array of removed elements. |
| 05:17 | Let us understand this using a sample program. |
| 05:21 | Go to the perlArray dot pl file, which we created earlier. |
| 05:26 | Type the piece of code as shown on the screen. |
| 05:30 | We need to provide index from where we want to remove the elements and |
| 05:35 | the offset upto which we want to remove the elements |
| 05:39 | In our case, the elements 5 and 6 will be removed. |
| 05:44 | Then switch to the terminal and execute the Perl script by typing - |
| 05:49 | perl perlArray dot pl and press Enter. |
| 05:55 | The output is as shown on the terminal |
| 05:59 | Now let us look at few other inbuilt functions of Arrays. |
| 06:04 | split function is used to divide a string at a specified delimiter. |
| 06:10 | The return value of this function is an Array. |
| 06:14 | The elements of this Array are the divided portions of the string. |
| 06:19 | join function joins the elements of an Array , using the specified delimiter. |
| 06:25 | It returns a string of joined elements. |
| 06:28 | sort function sorts an Array in alphabetical/numerical order. |
| 06:34 | qw function returns an Array of words, separated by a white space. |
| 06:40 | Now let us understand all these functions using a sample program. |
| 06:45 | Switch to terminal and type |
| 06:48 | gedit arrayFunctions dot pl space ampersand and Press Enter |
| 06:55 | Type the following piece of code as shown on screen. |
| 07:00 | In this case, each word of the variable string will become an element of an Array |
| 07:07 | Here, each element of newArray will be joined by comma. |
| 07:12 | sort function will sort the elements of an Array in alphabetical order. |
| 07:19 | qw function creates an Array of words separated by space. |
| 07:25 | Let us understand each function. |
| 07:28 | split function takes two arguments. |
| 07:31 | 1st argument is the delimiter by which the string needs to be split |
| 07:36 | 2nd is the string which needs to be split. |
| 07:39 | Delimiters can be specified in forward slash, single or double quotes. |
| 07:45 | join function takes 2 arguments. |
| 07:48 | 1st is the delimiter by which the Array elements needs to be joined. |
| 07:53 | 2nd is the Array. |
| 07:55 | Delimiters can be specified in single or double quotes. |
| 07:58 | sort function takes a single argument , which is the Array that needs to be sorted. |
| 08:05 | qw function returns an Array of words, separated by space. |
| 08:11 | It is not necessary to specify the word in quotes , if written using qw. |
| 08:17 | Then switch to the terminal and execute the Perl script by typing - |
| 08:23 | perl arrayFunctions dot pl |
| 08:26 | and press Enter. |
| 08:29 | The following output is displayed on the screen. |
| 08:33 | Let us summarize. |
| 08:34 | In this tutorial, we have learnt to - |
| 08:36 | add/remove elements from an Array |
| 08:40 | basic functions which can be performed on Array using sample programs |
| 08:46 | Here is assignment for you - |
| 08:48 | 'script.spoken-tutorial.org/index.php/Perl' |
| 08:54 | split the above string at '/ ' (forward slash) delimiter |
| 08:59 | Add https:// at the start of an newly created Array |
| 09:06 | Remove element “Perl” from the Array |
| 09:09 | Declare number Array and sort it |
| 09:12 | Watch the video available at the following link |
| 09:15 | It summaries the Spoken Tutorial project |
| 09:19 | If you do not have good bandwidth, you can download and watch it |
| 09:24 | The Spoken Tutorial Project Team Conducts workshops using spoken tutorials |
| 09:30 | Gives certificates to those who pass an online test |
| 09:34 | For more details, please write to contact at spoken hyphen tutorial dot org |
| 09:40 | Spoken Tutorial Project is a part of the Talk to a Teacher project |
| 09:44 | It is supported by the National Mission on Education through ICT, MHRD, Government of India. |
| 09:51 | More information on this Mission is available at spoken hyphen tutorial dot org slash NMEICT hyphen Intro |
| 10:02 | Hope you enjoyed this Perl tutorial. |
| 10:04 | This is Amol signing off. |
| 10:06 | Thanks for joining. |
