WoW:API wipe: Difference between revisions
Jump to navigation
Jump to search
(Example first since it's simpler, lays foundation for concepts in Notes) |
m (→Notes) |
||
Line 19: | Line 19: | ||
== Notes == | == Notes == | ||
The difference between ''wipe(table)'' and ''table={}'' is that ''wipe'' removes the contents of the table, but retains the variable's internal pointer. | * While this function returns an empty table, it is not necessary to assign it to a variable. | ||
local t = {"stuff"} | |||
t = wipe(t) | |||
print(#t) -- prints 0 | |||
local t = {"stuff"} | |||
wipe(t) | |||
print(#t) -- also prints 0 | |||
* The difference between ''wipe(table)'' and ''table={}'' is that ''wipe'' removes the contents of the table, but retains the variable's internal pointer. | |||
data={1,2,3} | data={1,2,3} |
Revision as of 06:00, 16 October 2009
Wipes a table of all contents.
table = table.wipe(table)
Arguments
- table
- Table - The table to be cleared.
Returns
- table
- Table - The empty table.
Example
local tab = {} tab.Hello = "Goodbye" print(tab.Hello) -- print "Goodbye" tab = table.wipe(tab) print(tab.Hello) -- print nil
Notes
- While this function returns an empty table, it is not necessary to assign it to a variable.
local t = {"stuff"} t = wipe(t) print(#t) -- prints 0 local t = {"stuff"} wipe(t) print(#t) -- also prints 0
- The difference between wipe(table) and table={} is that wipe removes the contents of the table, but retains the variable's internal pointer.
data={1,2,3} copy=data assert(copy==data) -- they're the same object copy={} assert(copy~=data) -- they're no longer the same: assert(#copy==0) -- the copy is expectedly empty, assert(#data==3) -- but the original table remains. copy2=data assert(copy2==data) -- they're the same object wipe(copy2) assert(copy2==data) -- they're still the same object: assert(#copy2==0) -- the copy is expectedly empty, assert(#data==0) -- and so is the original table.