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06-30-18, 08:39 AM   #1
alikim
A Fallenroot Satyr
Join Date: Jul 2015
Posts: 25
How to get element count for this table?

Code:
PRF = {
	["Profile_1"] = {
		["pve"] = {
			{
				"Blood Frenzy", -- [1]
				22420, -- [2]
			}, -- [1]
			{
				"Guttural Roars", -- [1]
				22424, -- [2]
			}, -- [2]
			{
				"Balance Affinity", -- [1]
				22163, -- [2]
			}, -- [3]
			{
				"Mass Entanglement", -- [1]
				18576, -- [2]
			}, -- [4]
			{
				"Incarnation: Guardian of Ursoc", -- [1]
				21706, -- [2]
			}, -- [5]
			{
				"Survival of the Fittest", -- [1]
				22422, -- [2]
			}, -- [6]
			{
				"Pulverize", -- [1]
				22425, -- [2]
			}, -- [7]
		},
		["pvp"] = {
		},
		["bar"] = {
		},
	},
}
How do I get number of profile records in this table?

The function below gives me "count 0 0", I expect 1 for "Profile_1"

Code:
print("count " .. table.getn(PRF) .. " " .. #PRF)
Thank you!
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06-30-18, 09:17 AM   #2
LanceDH
A Fallenroot Satyr
Join Date: Aug 2012
Posts: 26
getn only works with positive integer keys, from 1 until the sequence breaks.
If the key is another type, such as a table or string in this case, it won't count it.
Lua Code:
  1. local t = {"a", "b", "c"}
  2. print(#t); -- prints 3
  3. t[5] = "e";
  4. print(#t); -- still prints 3, because there is no key 4
  5. t["4"] = "d";
  6. print(#t); -- still prints 3, because key "4" is a string, not an integer

To get the number of all keys in a table, you have to create a for loop:
Lua Code:
  1. local count = 0;
  2. for key, value in pairs(PRF) do
  3.    count = count + 1;
  4. end
  5. print(count); -- will print 1
Note that I used pairs for this for loop instead of ipairs. It's the same thing where ipairs will only loop the sequencing integer keys (1-3 in table t from the first example)

Last edited by LanceDH : 06-30-18 at 09:32 AM.
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06-30-18, 10:04 AM   #3
alikim
A Fallenroot Satyr
Join Date: Jul 2015
Posts: 25
T h a n k s !
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WoWInterface » Developer Discussions » Lua/XML Help » How to get element count for this table?

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