Chandrika: Created page with '{| border=1 !Time !Narration |- |0:00 |A multdimensional array is an array inside which you can store other arrays. |- |0:06- 0:08 |It is very similar to the associative array.…'

2012-11-29T06:34:04Z

Created page with '{| border=1 !Time !Narration |- |0:00 |A multdimensional array is an array inside which you can store other arrays. |- |0:06- 0:08 |It is very similar to the associative array.…'

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{| border=1
!Time
!Narration
|-
|0:00
|A multdimensional array is an array inside which you can store other arrays.
|-
|0:06- 0:08
|It is very similar to the associative array.
|-
|0:09- 0:14
|However, the associates for this array are arrays themselves.
|-
|0:15- 0:18
|For a better understanding, let us start the program.
|-
|0:19- 0:24
|I will create a program that lets you see the position of a letter in the English
alphabet.
|-
|0:26- 0:32
|For example, if I give the value 1, it should echo out "A" in position 1.
|-
|0:33- 0:37
|If I give the value two it would say "B" in position 2.
|-
|0:38- 0:42
|And for three, it will say "C" is in position 3, and so on.
|-
|0:43- 1:45
|First I will create my own array.
|-
|0:53- 0:57
|And just for easy viewing, I will bring this down.
|-
|0:58- 1:00
|You are welcome going to do so yourself.
|-
|1:01- 1:06
|And inside. I will create my own array, which I will call ‘ABC’.
|-
|1:10- 1:11
|That will be the array.
|-
|1:15- 1:20
|Instead of putting a value here, as we did before, we have an array inside.
|-
|1:24- 1:31
|And inside these, will be the values, for example, Capital A, B, C and D.
|-
|1:32- 1:35
|These values are separated by commas.
|-
|1:51- 1:56
|And then we type “123” and that is equal to an array.
|-
|1:45- 1:50
|Now we’re just going to have ‘1,2,3,4, and that’s it.
|-
|1:53- 1:58
|Down here, I’ll show you how to echo out specific data inside the array.
|-
|1:59-2:01
|We’ll call our main array.
|-
|2:03- 2:04
|And we’ll call this array as well.
|-
|2:05- 2:12
|And then the position of what you want inside the array. So it’s an array inside an array.
|-
|2:13-2:18
|So I will type ‘echo’ and then ‘alpha’ which is our main array.
|-
|2:19- 2:22
|And then inside square brackets, ‘ABC’.
|-
|2:23- 2:29
|And next, inside square brackets, the position of the element you want to retrieve.
|-
|2:28- 2:34
|Now, for example, is going to echo "A".
|-
|2:35- 2:44
|Let us give that a run - and we got "A".
|-
|2:47- 2:51
|Changing this to ‘123’, will hopefully give us "1".
|-
|2:54- 2:56
|As you can see here.
|-
|2:57-3:04
|So we've made our two basic arrays inside our main arrays, and we’ve learnt to call it.
|-
|3:05- 3:11
|Now I’m going to create a new program to find out the position of a letter in relation to its number.
|-
|3:13- - 3:26
|I’m going to type up here ‘ postion = 0’, since 0 is the beginning.
|-
|3:30- 3:35
|Now I will echo out ‘Letter something is in position something’.
|-
|3:39- 3:40
|This is quite simple.
|-
|3:42- 3:51
|We enter a position here, say 3. Since C is in position 3 in the alphabet, we get C.
|-
|3:53- 3:59
|So , to echo out our letter, if I am going to replace the first blank with ‘alpha’.
|-
|4:02- 4:03
|ABC
|-
|4:05- 4:06
|'pos'
|-
|4:07- 4:09
|as 'pos' represents our position.
|-
|4:11- 4:17
|So then, the position will be - Alpha... 123
|-
|4:19- 4:22
|And then the position, ‘pos’.
|-
|4:23- 4:26
|At the moment, position is equal to 0.
|-
|4:29- 4:35
|We type ’echo something’. So this is position zero.
|-
|4:36- 4:46--??
|Position zero inside the internal array “ABC”. So in actual fact, we are saying that A is in position 0,
|-
|4:47- 4:55
|which is this array, 123 and that is position zero. So actually we are saying that letter A is in position one.
|-
|4:55- 5:04
|Lets run this. Okay. A is in position 1. Let’s change this to 1.
|-
|5:05- 5:17
|Refresh. Letter B is in position 2. Now what I will do to make this application fully functional and easy to navigate, is eliminate the necessity to write zero for 1.
|-
|5:21- 5:29
|So I will put ‘-1’ at the end and put 1 in brackets for better legibility.
|-
|5:30- 5:44
|So, position one minus one is infact zero. So, writing 1 will give the same result as 0. Writing 2 will give us the same result as writing 1... So letter B is in position 2.
|-
|5:44- 6:01
|So if I put 1 we get A is in position 1. If I put zero here; there is no position -1; so we get “letter in position”. So we don’t have the letter or the position.
|-
|6:02 onwards
|So, I’ve made that a bit more user-friendly. Thanks for watching!

PHP-and-MySQL/C2/Multi-Dimensional-Arrays/English - Revision history

Chandrika: Created page with '{| border=1 !Time !Narration |- |0:00 |A multdimensional array is an array inside which you can store other arrays. |- |0:06- 0:08 |It is very similar to the associative array.…'