BASH/C2/Array-Operations-in-BASH/English-timed - Revision history

Pratik kamble at 10:54, 20 February 2017

2017-02-20T10:54:48Z

Pratik kamble at 06:11, 3 January 2017

2017-01-03T06:11:21Z

Sandhya.np14 at 05:15, 10 July 2015

2015-07-10T05:15:08Z

Sandhya.np14 at 05:11, 10 July 2015

2015-07-10T05:11:59Z

Show changes

Sandhya.np14 at 09:09, 2 July 2015

2015-07-02T09:09:09Z

Show changes

PoojaMoolya at 11:38, 17 December 2014

2014-12-17T11:38:19Z

PoojaMoolya at 06:17, 5 December 2014

2014-12-05T06:17:47Z

Ranjana: Created page with "'''Title of script: Array Operations In BASH''' '''Author:''' Lavitha Pereira '''Keywords: Video tutorial, Bash shell, Array''' {| border=1 !Time !Narration |- | 00:01..."

2014-11-20T07:25:00Z

Created page with "'''Title of script: Array Operations In BASH''' '''Author:''' Lavitha Pereira '''Keywords: Video tutorial, Bash shell, Array''' {| border=1 !Time !Narration |- | 00:01..."

New page

'''Title of script: Array Operations In BASH'''

'''Author:''' Lavitha Pereira

'''Keywords: Video tutorial, Bash shell, Array'''

{| border=1
!Time
!Narration

|-
| 00:01
| Welcome to the spoken tutorial on '''Array operations in BASH '''

|-
| 00:05
| In this tutorial, we will learn how to
* Declare an ''' Array''' and assign value to it.

|-
| 00:12
| * Initialize an''' Array''' during declaration

|-
| 00:15
| * To find length of an ''' Array''' and its '''n'''th''' element'''

|-
| 00:20
| * To print an '''Array'''

|-
| 00:22
| To follow this tutorial, You should be familiar with '''Linux Operating System.'''

|-
| 00:27
| For relevant tutorials please visit ''' spoken hyphen tutorial dot org.'''

|-
| 00:33
|For this tutorial I am using

|-
| 00:37
| * '''Ubuntu Linux 12.04''' OS

|-
| 00:41
| * '''GNU Bash''' version '''4.1.10'''

|-
| 00:45
| '''GNU Bash '''version '''4''' or above is recommended for practise.

|-
| 00:50
|Let us start with the definition of an ''' Array''' and its characteristics.

|-
| 00:55
| * An '''Array''' is a variable with multiple values.

|-
| 01:01
| * The values can be of same or different types

|-
| 01:04
| * There is no maximum limit for the size of an '''array'''

|-
| 01:08
| * '''Array''' members need not be consecutive

|-
| 01:12
| * '''Array index''' always starts with '''zero'''

|-
| 01:16
| We will now see how to declare and assign a value to an '''Array'''.

|-
| 01:21
| The syntax to declare an '''Array''' is -

|-
| 01:24
| '''declare hyphen `a` arrayname'''

|-
| 01:28
| '''“declare”''' keyword is used to declare an '''Array'''.

|-
| 01:31
| It is a built-in command in '''Bash'''.

|-
| 01:35
| The syntax to assign a value to an '''Array '''is-

|-
| 01:38
| '''Name within square brackets index equals to within single quotes value.'''

|-
| 01:46
| Now let see how to initialize an '''Array''' during declaration.

|-
| 01:51
| * '''Array''' can be declared and initialized at the same time.

|-
| 01:56
|* Element Should be separated by a '''space''' .

|-
| 02:00
| Each element should be within '''parentheses'''.

|-
| 02:03
| The syntax is '''declare hyphen `a` arrayname equal-to within round brackets within single quotes 'element1' , 'element2'''' and '''element3''' .

|-
| 02:19
| Let us try an example.

|-
| 02:21
| Open the '''terminal''' by pressing '''Ctrl+Alt''' and '''T''' keys simultaneously.

|-
| 02:28
| Now Type: '''gedit''' '''space array.sh''' space &

|-
| 02:36
| We use the ampersand to free up the prompt. Press Enter

|-
| 02:41
| Type the code as shown here in your ''' array.sh '''file'''.

|-
| 02:47
| This line declares an '''Array''' named '''Linux''' with elements -

* '''Debian, '''
* '''Redhat, '''
* '''Ubuntu and '''
* '''Fedora'''

|-
| 02:57
| Here '''hyphen `a` ''' is a '''flag.'''

|-
| 03:00
| It allows us to read and assign '''values''' to an '''Array.'''

|-
| 03:05
| Let us switch back to the slides.

|-
| 03:07
| The length of an '''Array''' can be obtained by this syntax:

|-
| 03:12
| '''Dollar sign opening curly bracket hash arrayname within square bracket At sign and closing curly bracket'''

|-
| 03:22
| The length of the '''nth ''' element can be obtained by this syntax:

|-
| 03:28
| '''Dollar sign opening curly bracket hash arrayname within square brackets `n` and closing curly bracket'''.

|-
| 03:37
| Here '''n''' is the element number, whose length is to be found.

|-
| 03:42
| All the elements of the '''Array''' can be printed using this syntax.

|-
| 03:48
| '''Dollar sign opening curly bracket Arrayname within square brackets `At sign` and closing curly bracket.'''

|-
| 03:57
| Now come back to the '''text editor.'''

|-
| 04:00
| This line will display total number of elements in the '''Array Linux'''.

|-
| 04:06
| '''hyphen `e` '''enables interpretation of '''backslash '''escapes.

|-
| 04:11
| We have included this as we have '''backslash `n` ''' at the end of the line.

|-
| 04:18
| The next line displays all the elements of the '''Array Linux.'''

|-
| 04:23
| This line displays the 3<sup>rd</sup> element of the '''Array Linux.'''

|-
| 04:28
| Please note that an '''Array''' always starts with '''index''' '''zero.'''

|-
| 04:34
|Lastly, this line displays the number of characters present in the 3<sup>rd</sup> element'''.

|-
| 04:40
| Now switch to the '''Terminal.'''

|-
| 04:42
| Let's first make the file executable by typing '''chmod''' space plus x space array.sh Press Enter.

|-
| 04:56
| Type, '''dot slash array .sh''' Press '''Enter.'''

|-
| 05:01
| The output is displayed.

|-
| 05:04
|The number of elements or the length of the '''Array `Linux`''' is '''four.'''

|-
| 05:10
| The elements of the '''Array Linux''' are '''Debian, Redhat, Ubuntu and Fedora.'''

|-
| 05:18
| The '''3rd''' element of '''Array Linux''' is ''' Ubuntu'''.

|-
| 05:22
| And the number of characters in the '''third element''' is '''six,''' as expected.

|-
| 05:29
| This bring us to the end of this tutorial.

|-
| 05:32
| Let us summarize. Come back to our slides.

|-
| 05:35
| In this tutorial we learnt to ,

|-
| 05:40
| * Declare and assign values to an '''Array'''

|-
| 05:43
|* Initialize an '''Array''' during declaration

|-
| 05:46
|* To find length of an '''Array''' and its '''nth''' element and

|-
| 05:51
| * To print whole ''' Array'''

|-
| 05:53
|As an assignment.

|-
| 05:55
| Declare an array '''names''' of length '''7''' and find:

|-
| 06:00
| * the total number of elements

|-
| 06:02
|* print all the elements

|-
| 06:04
|* And print the 5th element

|-
| 06:06
|Watch the video available at the link shown below

|-
| 06:10
| It summarises the Spoken Tutorial project

|-
| 06:13
| If you do not have good bandwidth, you can download and watch it

|-
| 06:18
| The Spoken Tutorial Project Team

|-
| 06:20
| Conducts workshops using spoken tutorials

|-
| 06:24
| Gives certificates to those who pass an online test

|-
| 06:27
| For more details, please write to contact@spoken-tutorial.org.

|-
| 06:35
|Spoken Tutorial Project is a part of the Talk to a Teacher project

|-
| 06:40
| It is supported by the National Mission on Education through ICT, MHRD, Government of India

|-
| 06:47
| More information on this Mission is available at the link shown below.

|-
| 06:52
| The script has been contributed by FOSSEE and spoken-tutorial team.

|-
| 06:58
| This is Ashwini Patil from IIT Bombay.

|-
| 07:02
| Thank you for joining.

|}

@@ Line 1: / Line 1: @@
 {| border=1
-!Time
+|'''Time'''
-!Narration
+|'''Narration'''
 |-
@@ Line 145: / Line 139: @@
 |-
 | 02:41
-| Type the '''code''' as shown here, in your "array.sh" file.
+| Type the '''code''' as shown here, in your '''"array.sh"''' file.
 |-
 | 02:47
 | This line declares an '''array''' named '''Linux''' with elements -
-"Debian", "Redhat", "Ubuntu" and "Fedora".
+'''"Debian", "Redhat", "Ubuntu" and "Fedora"'''.
 |-
 | 02:57
-| Here hyphen 'a' is a '''flag.'''
+| Here hyphen '''a''' is a '''flag.'''
 |-

@@ Line 1: / Line 1: @@
 {| border=1
 |'''Time'''
@@ Line 10: / Line 9: @@
 |-
 | 00:05
-| In this tutorial, we will learn how to:
+| In this tutorial, we will learn how to:Declare an ''' array''' and assign values to it.
-* Declare an ''' array''' and assign values to it.
 |-
 | 00:12
-|* Initialize an''' array''' during declaration.
+| Initialize an''' array''' during declaration.
 |-
 | 00:15
-|* To find length of an ''' array''' and its n<sup>th</sup> '''element'''.
+| To find length of an ''' array''' and its n<sup>th</sup> '''element'''.
 |-
 | 00:20
-|* To print an '''array'''.
+| To print an '''array'''.
 |-
@@ Line 39: / Line 37: @@
 |-
 | 00:37
-| * '''Ubuntu Linux 12.04''' OS
+|  '''Ubuntu Linux 12.04''' OS
 |-
 | 00:41
-| * '''GNU Bash''' version '''4.1.10'''
+|  '''GNU Bash''' version '''4.1.10'''
 |-
@@ Line 55: / Line 53: @@
 |-
 | 00:55
-| * An '''array''' is a '''variable''' with multiple '''values'''.
+|  An '''array''' is a '''variable''' with multiple '''values'''.
 |-
 | 01:01
-| * The values can be of same or different types.
+|  The values can be of same or different types.
 |-
 | 01:04
-| * There is no maximum limit for the '''size''' of an '''array'''.
+|  There is no maximum limit for the '''size''' of an '''array'''.
 |-
 | 01:08
-| * '''Array''' members need not be consecutive.
+|  '''Array''' members need not be consecutive.
 |-
 | 01:12
-| * '''Array index''' always starts with '''zero'''.
+|  '''Array index''' always starts with '''zero'''.
 |-
@@ Line 107: / Line 105: @@
 |-
 |  01:51
-| * '''Array''' can be declared and initialized at the same time.
+|  '''Array''' can be declared and initialized at the same time.
 |-
 | 01:56
-|* '''Elements''' Should be separated by a '''space''' .
+| '''Elements''' Should be separated by a '''space''' .
 |-
@@ Line 264: / Line 262: @@
 |-
 | 05:40
-| * Declare and assign values to an '''array'''
+|  Declare and assign values to an '''array'''
 |-
 | 05:43
-|* Initialize an '''array''' during declaration
+| Initialize an '''array''' during declaration
 |-
 | 05:46
-|* To find length of an '''array''' and its n<sup>th</sup> element and
+| To find length of an '''array''' and its n<sup>th</sup> element and
 |-
 | 05:51
-| * To print whole '''array'''.
+|  To print whole '''array'''.
 |-
@@ Line 288: / Line 286: @@
 |-
 | 06:00
-| * the total number of elements
+|  the total number of elements
 |-
 | 06:02
-|* print all the elements
+| print all the elements
 |-
 | 06:04
-|* and print the 5<sup>th</sup> element.
+| and print the 5<sup>th</sup> element.
 |-
@@ Line 316: / Line 314: @@
 |-
 | 06:20
-|* Conducts workshops using spoken tutorials.
+| Conducts workshops using spoken tutorials.
 |-
 | 06:24
-|* Gives certificates to those who pass an online test.
+| Gives certificates to those who pass an online test.
 |-

@@ Line 21: / Line 21: @@
 |-
 | 00:12
-| * Initialize an''' array''' during declaration.
+|* Initialize an''' array''' during declaration.
 |-
 | 00:15
-| * To find length of an ''' array''' and its n<sup>th</sup> '''element'''.
+|* To find length of an ''' array''' and its n<sup>th</sup> '''element'''.
 |-
 | 00:20
-|  * To print an '''array'''.
+|* To print an '''array'''.
 |-

@@ Line 126: / Line 126: @@
 | 02:03
 | The syntax is '''declare hyphen `a` arrayname equal-to within round brackets within single quotes 'element1' , 'element2'''' and '''element3''' .
 |-
@@ Line 309: / Line 307: @@
 | 06:04
 |* And print the 5th element
 |-

@@ Line 236: / Line 236: @@
 |-
 | 04:42
-| Let's first make the file executable by typing '''chmod''' space plus x space array.sh Press Enter.
+| Let's first make the file executable by typing '''chmod''' space '''plus x space array.sh'''. Press Enter.
 |-
 | 04:56
-| Type, '''dot slash array .sh''' Press '''Enter.'''
+| Type, '''dot slash array .sh'''. Press '''Enter.'''
 |-
@@ Line 261: / Line 261: @@
 | 05:22
 | And the number of characters in the '''third element''' is '''six,''' as expected.
 |-