Programming Forums > Web Development and Design > PHP

PhilBon · Nov 18th, 2005, 11:35 PM

Alright, I've been working on this problem for a while. I have the array invloving these items:

tnt, school, staff, pictures, other, new, school, pictures, new, other, crap, junk, etc.

I have been trying to write a php script that will eliminate all the ones that occur the 2nd time so I would want the array above to look like this:

tnt, school, staff, pictures, other, new, crap, junk, etc.

See how they only are represented once...That's what i need, anyone got any ideas?

Ooble · Nov 19th, 2005, 6:52 AM

I suggest you check out the modulus operator (in PHP, this is the % character). It gives you the remainder of a number when divided by another. For example,

(Toggle Plain Text)

5 % 3 == 2

DaWei · Nov 19th, 2005, 7:21 AM

I think you need to be more specific regarding the construction of the array(s) in question. Textual or numeric keys? Duplicates of 2nd dimension array? I'm at a loss as to application of the modulus operator, but one never knows -- perhaps you have a really strange setup. I'm pretty sure the red and blue have nothing to do with it.

Ooble · Nov 19th, 2005, 7:32 AM

From what I can tell, he has an array, and he wants to remove every second item. I would personally iterate through, check whether the element number is evenly divisible by two, and remove based on the result.

DaWei · Nov 19th, 2005, 7:53 AM

I didn't pick up on it that way, "school" being in the second and seventh elements in the example.

tempest · Nov 19th, 2005, 8:07 AM

http://php.net/array_unique

nnxion · Nov 19th, 2005, 8:58 AM

Quote:

Originally Posted by PhilBon

[color=Blue]tnt, school, staff, pictures, other, new, school, pictures, new, other, crap, junk, etc.

If these are your priorities in life, I think you would be a terrorist, with having TNT first. If array_unique is not what you need then just loop through the array and look at the items you have already had and do something with them.

Ooble · Nov 19th, 2005, 10:44 AM

Quote:

Originally Posted by DaWei

I didn't pick up on it that way, "school" being in the second and seventh elements in the example.

Damnit! Stop misreading questions, Oobs!

Lich · Nov 19th, 2005, 11:48 AM

Quote:

Originally Posted by nnxion

If these are your priorities in life, I think you would be a terrorist, with having TNT first. If array_unique is not what you need then just loop through the array and look at the items you have already had and do something with them.

lol, wow.

tempest · Nov 19th, 2005, 3:14 PM

He might be a patriotic terrorist with the use of colors in his post...

Nov 18th, 2005, 11:35 PM	#1
PhilBon Hobbyist Programmer Join Date: Nov 2005 Posts: 172 Rep Power: 3	Comparing an array Alright, I've been working on this problem for a while. I have the array invloving these items: tnt, school, staff, pictures, other, new, school, pictures, new, other, crap, junk, etc. I have been trying to write a php script that will eliminate all the ones that occur the 2nd time so I would want the array above to look like this: tnt, school, staff, pictures, other, new, crap, junk, etc. See how they only are represented once...That's what i need, anyone got any ideas?

Nov 19th, 2005, 6:52 AM	#2
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	I suggest you check out the modulus operator (in PHP, this is the % character). It gives you the remainder of a number when divided by another. For example, (Toggle Plain Text) 5 % 3 == 2 5 % 3 == 2 __________________ Me :: You :: Them

Nov 19th, 2005, 7:21 AM	#3
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	I think you need to be more specific regarding the construction of the array(s) in question. Textual or numeric keys? Duplicates of 2nd dimension array? I'm at a loss as to application of the modulus operator, but one never knows -- perhaps you have a really strange setup. I'm pretty sure the red and blue have nothing to do with it. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Nov 19th, 2005, 7:32 AM	#4
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	From what I can tell, he has an array, and he wants to remove every second item. I would personally iterate through, check whether the element number is evenly divisible by two, and remove based on the result. __________________ Me :: You :: Them

Nov 19th, 2005, 7:53 AM	#5
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	I didn't pick up on it that way, "school" being in the second and seventh elements in the example. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Nov 19th, 2005, 8:07 AM	#6
tempest Programming Guru Join Date: Oct 2004 Posts: 1,041 Rep Power: 5	http://php.net/array_unique __________________

Nov 19th, 2005, 3:14 PM	#10
tempest Programming Guru Join Date: Oct 2004 Posts: 1,041 Rep Power: 5	He might be a patriotic terrorist with the use of colors in his post... __________________

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Programming Forums > Web Development and Design > PHP

Comparing an array