Kenix1 at 14:27, 15 April 2013

2013-04-15T14:27:19Z

← Older revision		Revision as of 14:27, 15 April 2013
Line 85:		Line 85:
	It's LIE!		It's LIE!

	~~This~~ compare userdata of both tables.		Here is compare userdata of both tables.
	]]		]]

Kenix1: Created page with "{{Useful Function}} NOTOC This function check if both tables is equal. ==Syntax== boolean table.compare( table a, table a2 )
2013-04-15T14:26:06Z

Created page with "{{Useful Function}} <lowercasetitle></lowercasetitle> NOTOC This function check if both tables is equal. ==Syntax== <syntaxhighlight lang="lua">boolean table.compare( table a, table a2 )</c..."

New page
{{Useful Function}}
<lowercasetitle></lowercasetitle>
NOTOC
This function check if both tables is equal.
==Syntax==
<syntaxhighlight lang="lua">boolean table.compare( table a, table a2 )</syntaxhighlight>

===Required Arguments===
* '''a''': The table to check.
* '''a2''': The table to check.

===Note===
This function equal only number and string values of tables. All other types ignored! <br>
See examples.

===Returns===
Returns true if tables is equal.

<section name="Code" class="both" show="true">
<syntaxhighlight lang="lua">
function table.compare( a1, a2 )
if
type( a1 ) == 'table' and
type( a2 ) == 'table'
then

local function size( t )
if type( t ) ~= 'table' then
return false
end
local n = 0
for _ in pairs( t ) do
n = n + 1
end
return n
end

if size( a1 ) == 0 and size( a2 ) == 0 then
return true
elseif size( a1 ) ~= size( a2 ) then
return false
end

for _, v in pairs( a1 ) do
local v2 = a2[ _ ]
if type( v ) == type( v2 ) then
if type( v ) == 'table' and type( v2 ) == 'table' then
if size( v ) ~= size( v2 ) then
return false
end
if size( v ) > 0 and size( v2 ) > 0 then
if not table.compare( v, v2 ) then
return false
end
end
elseif
type( v ) == 'string' or type( v ) == 'number' and
type( v2 ) == 'string' or type( v2 ) == 'number'
then
if v ~= v2 then
return false
end
else
return false
end
else
return false
end
end
return true
end
return false
end
</syntaxhighlight>
</section>

<section name="Example" class="both" show="true">
<syntaxhighlight lang="lua">
--[[
Well all noobs can say about this function is suck because i can compare both tables like this:
a = { 1 }
a2 = { 1 }
print( a == a2 ) --> FALSE

It's LIE!

This compare userdata of both tables.
]]

local a1 = { 1, 2, 3 }
local a2 = { 1, 2, 3 }

print( table.compare( a1, a2 ) ) --> TRUE condition working. Because tables are same.

local a3 = { 1, { 2, 4 }, 5 }
local a4 = { 1, { 2, 4 }, 5 }

print( table.compare( a3, a4 ) ) --> TRUE condition working. Because tables are same.

local a5 = { { 1, 2, 3 }, 5 }
local a6 = { 1, 5 }

print( table.compare( a5, a6 ) ) --> FALSE condition doesn't working. Because tables are not same.

local a7 = { 'a', 'b' }
local a8 = { 'a', 'b' }

print( table.compare( a7, a8 ) ) --> TRUE condition working. Because tables are same.

local a9 = { 1, {}, 5 }
local a10 = { 1, {}, 5 }

print( table.compare( a9, a10 ) ) --> TRUE condition working. Because tables are same.
</syntaxhighlight>
</section>

Author: Kenix

==See Also==
{{Useful_Functions}}