View source for PERL/C3/Exception-and-error-handling-in-PERL/Khasi


{| Border = 1
|  <center>'''Time'''</center>
|  <center>'''Narration'''</center>
|-
| 00:01
| Khublei ngi pdiangsngewbha iaphi sha ka ''' Spoken Tutorial''' halor ka''' Exception and error handling''' ha ka '''PERL'''.
|-
| 00:06
| Ha kane ka jinghikai, ngin ia pule kumno ban:
'''Catch''' ia ki errors bad
Handle ia ki '''exceptions'''.
|-
| 00:12
| Na ka bynta kane ka jinghikai, nga pyndonkam da ka:
'''Ubuntu Linux 12.04''' operating system
'''Perl 5.14.2''' bad ka
''' gedit''' Text Editor.
|-
| 00:23
|Phi lah ban pyndonkam ia kano kano ka '''text editor''' katkum kamon jong phi.
|-
| 00:27
| Ban bud ia kane ka jinghikai, phi dei ban don ia ka jingtip shaphang ka ''' Perl''' programming.
|-
| 00:32
|Lada phim don, te leit sha ki spoken tutorials ba iadei halor ka ''' Perl''' ha ka ''' spoken tutorial''' website.
|-
|00:39
| Ynda ka '''error''' ka mih, ka '''Exception handling''' ka pynkylla ia ka execution jong ka program na ka normal execution path.
|-
| 00:47
| '''Error handling''' ka iarap ban pynioh biang ia ka program, khlem da khang ia ka '''application'''.
|-
| 00:53
| Ngi lah ban ithuh bad trap ia ka error ha ki  bun ki rukom. Ngin ia peit ia ki katto katne ki methods kiba shait pyndonkam ha ka '''Perl'''.
|-
| 01:01
| Ka ''' warn''' function ka ai tang ia ka khubor kaba maham khlem da shim ia ka sien jam hadien kata.
|-
| 01:07
| Ka ''' die''' function mar mar ka khang ia ka execution bad ka pyni ia ka '''error message'''.
|-
| 01:13
| To ngin ia pyrshang ban sngewthuh ia ka ''' die''' function da kaba pyndonkam ia ka sample program kaba nga lah dep save lypa.
|-
| 01:20
| Leit sha ka ''' terminal''' bad type: '''gedit die dot pl ampersand ''' bad shon''' Enter'''.
|-
|01:29
| Une u dei u code ha ka 'die.pl' file. To mynta ngin ia pyrshang ban sngewthuh ia une u code.
|-
|01:35
| Hangne, ngi lah define ia ka function '''divide''' kaba shim ia ar tylli ki '''input parameters'''
kata '''dollar numerator ''' bad '''dollar denominator'''.
|-
| 01:46
|'''At the rate underscore '''(@_) udei u '''special variable ''' uba la pyndonkam ban pass ia ka '''parameter list''' sha ka function.
|-
| 01:53
| Lada u '''denominator''' udei zero, u '''die''' function un sa iehnoh ia ka script.
|-
| 01:57
|Kan sa pyni ruh ia ka '''error message''' na ka bynta ki nongpyndonkam ban pule. Lymda kumta, kan sa print ia ka output.
|-
| 02:05
| Kine kidei ki '''function call''' statements.
|-
| 02:08
|Ki ar tylli ki jingleh ba ha shwa, lah execute ia ka function namar ka parameter ba ar kam dei zero.
|-
| 02:15
| Ka jingleh balai, u '''denominator''' value udei zero. Te, ka '''die''' function kan sa execute.
|-
| 02:23
| Ka '''divide''' function ba khatduh kan nym execute namar ba ka '''die''' function ka iehnoh ia ka script.
|-
| 02:29
| Shon ''' Ctrl + S''' ban '''save''' ia ka program.
|-
| 02:32
| To ngin ia '''execute''' ia ka program.
|-
| 02:35
| Phai biang sha ka terminal bad type: '''perl die dot pl''' bad shon ''' Enter'''.
|-
|02:43
| Ka output ka lah paw kumba pyni hangne.
"Can't divide by zero!"  
|-
| 02:49
|Kane kadei ka error message kaba ngi lah ai ha ka program, ha ka '''die''' statement.
|-
| 02:54
| Hadien kane, ngin sa iohi kumno ban pyndonkam ia ka ''' eval''' function ha ka error handling.
|-
| 03:00
| '''eval''' function lah pyndonkam na ka bynta ka handling '''run-time error'''s lane '''exception'''s.
|-
| 03:06
|Kum ka nuksa, '''built-in error'''s kum ka '''out of memory, divide by zero''' lane user defined errors.
|-
| 03:14
| Ka general syntax na ka bynta ka ''' eval''' function la pyni hangne.
|-
| 03:19
|Ka ''' dollar exclamation'''($!) '''special variable''' ka buh ia ka error message, lada don.
|-
| 03:25
|Lymda kumta, ka '''dollar exclamation( $!) '''holds an empty '''string'''.  Kaba mut ia ka la evaluate kum '''false'''.
|-
| 03:33
| To ngin ia pyrshang ban sngewthuh ia ka ''' eval''' function da kaba pyndonkam ia ka sample program.
Leit sha ka ''' terminal.'''
|-
| 03:40
| Type: '''gedit eval dot pl ampersand ''' bad shon ''' Enter'''.
|-
| 03:47
| Ha ka ''' eval dot pl''' file, type ia u code harum kumba la pyni ha ka screen. To ngin ia batai mynta ia u code.
|-
| 03:54
| Hangne, ha ka nuksa jong ngi, '''open FILE''' ka pyntreikam ia ka ''' die''' statement, lada don ia ka jingeh ha kaban plie ia ka “test.dat”.
|-
| 04:05
| '''Perl''' ka ai ia ka '''system error message''' na ka '''eval''' block ba khatduh sha ka variable '''dollar exclamation( $!)'''.
|-
| 04:13
| Shon '''Ctrl + S''' ban '''save''' ia ka file.
|-
| 04:17
| Phai biang sha ka terminal bad type: '''perl eval dot pl''' bad shon ''' Enter'''.
|-
| 04:25
| Ka system error message ka paw kumba la pyni.
|-
| 04:30
| To ngin ia peit ia kiwei pat ka nuksa. Ha kane ka program, ngin sa iohi ia ka error message kaba pynphai na ka '''eval''' function da kaba pyndonkam ia ka '$@' ('''dollar at the rate''').
|-
| 04:40
| To ngin ia phai biang sha ka '''eval dot pl''' file.
|-
| 04:44
| Type ia u code kumba la pyni ha ka screen.
|-
| 04:48
|Ngi ia pass ia ka ''' $total''', '''$count''' kum ka input parameters sha ka function '''average'''.
|-
| 04:56
|Ngi lah ban ioh ia ka '''error''' lada ka '''count''' kadei zero.
|-
| 05:00
|Hangne, lah peit ia ka da ka '''die''' statement.
|-
| 05:04
|Ka error message kaba pynphai na ka '''eval''' kapaw da kaba pyndonkam ia ka '''$@ ( dollar at the rate)'''.
|-
| 05:11
|Lada kam paw, kan sa print ia ka '''Average''' value.
|-
| 05:15
| Shon '''Ctrl +S''' ban '''save''' ia ka file.  To ngin ia '''execute''' ia ka program.
|-
| 05:22
| Phai biang sha ka terminal bad type: '''perl eval.pl''' bad shon ''' Enter'''.
|-
| 05:31
| Ka output kadei kumba la pyni hangne.
|-
| 05:35
| Da kane ngi la poi sha kaba kut jong kane ka jinghikai. To ngin ia batai kyllum.
|-
| 05:41
|Ha kane ka jinghikai, ngi lah pule kumno ban:
Catch ia ki error bad
Handle ia ki exceptions.
|-
| 05:47
| Kum ka kam, leh ia kane harum.
Ha ka '''Linux''' machine jong phi, shna ia ka file 'emp.txt' ryngkat 5 tylli ki kyrteng jong ki '''employee'''
|-
| 05:57
|Pynkylla ia ka permission jong ka 'emp.txt' sha ka   '''READ''' only.
|-
| 06:02
|Kynmaw: Leit sha ka ''' Linux''' spoken tutorials ba iadei ha ka''' spoken tutorial''' website na ka bynta ka '''change permission'''
|-
| 06:10
|Thoh ia ka '''Perl''' program ban plie ia ka 'emp.txt' file ha ka '''WRITE''' mode bad pyndap katto katne ki kyrteng jong ki employee ha ka.
|-
| 06:19
| Pyndonkam ia ka "eval", print ia ka error message ba iadei lada ka '''open/write''' operation kam treikam.
|-
|06:26
| Ka video ha ka link harum ka kyllum lang ia ka '''Spoken Tutorial''' project. Sngewbha download bad peit ia ka.
|-
| 06:33
| Ka kynhun jong ka ''' Spoken Tutorial Project''':
Ka pynlong ia ki workshops da kaba pyndonkam ia ki spoken tutorials bad
Ka ai ia ki certificates sha kito kiba pass ha ka online tests.
|-
| 06:42
|Na ka bynta ki jingtip ba bniah, sngewbha thoh sha ngi.
|-
|   06:46
|  Ia ka Spoken Tutorial project la bei tyngka da ka NMEICT, MHRD, Sorkar India.
|-
| 06:53
|Kham bun ki jingtip halor kane ka mission kidon ha kane ka link.
|-
| 06:58
| Ma nga u Pdiangburom na Shillong, nga pynkut ia kane. Khublei shibun.
|}