WoW:USERAPI tinsertbeforeval - Revision history

Move page script: Move page script moved page USERAPI tinsertbeforeval to WoW:USERAPI tinsertbeforeval without leaving a redirect

2023-08-15T04:49:14Z

Move page script moved page USERAPI tinsertbeforeval to USERAPI tinsertbeforeval without leaving a redirect

← Older revision	Revision as of 04:49, 15 August 2023
(No difference)

WoWWiki>Quezacolt: /* Code */ Fixed tremovebyval

2009-04-12T01:28:22Z

Code: Fixed tremovebyval

← Older revision		Revision as of 01:28, 12 April 2009
Line 60:		Line 60:
	-- tremovebyval: remove a table row given its value		-- tremovebyval: remove a table row given its value
	function ''<PREFIX>''_tremovebyval(tab, val)		function ''<PREFIX>''_tremovebyval(tab, val)
	for k,v in tab do		for k,v in pairs(tab) do
	if(v==val) then		if(v==val) then
	table.remove(tab, k);		table.remove(tab, k);

WoWWiki>Valana: Added a short to tcount in case the specified table is an array.

2009-03-17T19:11:52Z

Added a short to tcount in case the specified table is an array.

← Older revision		Revision as of 19:11, 17 March 2009
Line 71:		Line 71:
	-- tcount: count table members even if they're not indexed by numbers		-- tcount: count table members even if they're not indexed by numbers
	function ''<PREFIX>''_tcount(tab)		function ''<PREFIX>''_tcount(tab)
	local n=0;		local n = #tab
	for _ in pairs(tab) do		if (n == 0) then
	n=n+1;		for _ in pairs(tab) do
			n = n + 1
			end
	end		end
	return n;		return n
	end		end

Line 92:		Line 94:

	__NOTOC__		__NOTOC__

	[[Category:User defined functions]]		[[Category:User defined functions]]

WoWWiki>Charibot: catfix

2008-07-09T00:44:20Z

catfix

← Older revision		Revision as of 00:44, 9 July 2008
Line 92:		Line 92:

	__NOTOC__		__NOTOC__
	[[Category:User ~~Defined Functions~~]]		[[Category:User defined functions]]

WoWWiki>Mikk: fix title

2006-06-09T22:20:32Z

fix title

New page

{{userfunc}} 
<center>'''Table Helpers''' ''- by [[user:Mikk|Mikk]] -''</center>

Miscellaneous table helper functions.

'''tinsertbeforeval'''(tab, valBefore, val)

boolRemoved = '''tremovebyval'''(tab, val)

num = '''tcount'''(tab)

'''tcopy'''(to, from)

Note that ''tinsertbeforeval'' and ''tremovebyval'' iterate over the table to find their targets; they can be quite slow compared to regular inserts/deletes.

== Examples ==

local tab = { "alice", "charles" }
'''tinsertbeforeval('''tab, "charles", "bob");
→ tab: "alice", "bob", "charles"
'''tinsertbeforeval'''(tab, "alice", "zeta");
→ tab: "zeta", "alice", "bob", "charles"

bool = '''tremovebyval'''(tab, "zeta");
→ bool = true
bool = '''tremovebyval'''(tab, "zeta");
→ bool = false

tab2["foo"]="bar";
tab2["abc"]="xyz";
myCount = '''tcount'''(tab2);
→ myCount = 2

'''tcopy'''(tab2, tab);
→ tab2:
["foo"]="bar",
["abc"]="xyz",
[1]="alice",
[2]="bob",
[3]="charles"

==Code==


-- tinsertbeforeval: insert a value before another value (given only values)
-- assumes integer-indexed table, or "before" loses its meaning
function ''<PREFIX>''_tinsertbeforeval(tab, valBefore, val)
for k,v in ipairs(tab) do
if(v==valBefore) then
table.insert(tab, k, val);
return;
end
end
-- print("insertbeforeval: Could not find \""..valBefore.."\". Appending last.");
table.insert(tab, val);
end

-- tremovebyval: remove a table row given its value
function ''<PREFIX>''_tremovebyval(tab, val)
for k,v in tab do
if(v==val) then
table.remove(tab, k);
return true;
end
end
return false;
end

-- tcount: count table members even if they're not indexed by numbers
function ''<PREFIX>''_tcount(tab)
local n=0;
for _ in pairs(tab) do
n=n+1;
end
return n;
end

-- tcopy: recursively copy contents of one table to another
function ''<PREFIX>''_tcopy(to, from) -- "to" must be a table (possibly empty)
for k,v in pairs(from) do
if(type(v)=="table") then
to[k] = {}
''<PREFIX>''_tcopy(to[k], v);
else
to[k] = v;
end
end
end

__NOTOC__
[[Category:User Defined Functions]]