WoW:USERAPI EraseTable: Difference between revisions
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__NOTOC__ | __NOTOC__ | ||
Erases a table, often a good way to reduce garbage creation. Note that erasing a table is generally more expensive than letting the GC system reclaim it, so one might prefer simply reallocating a new empty table. | Erases a table, often a good way to reduce garbage creation. Note that erasing a table is generally more expensive than letting the GC system reclaim it, so one might prefer simply reallocating a new empty table. Also note that a hash (as opposed to a 1..n integer-index) will NEVER SHRINK. Each key you ever used will use ~40 bytes and keep doing so until the table is destroyed. If you re-use the same keys this is obviously a nonissue. | ||
local function EraseTable(t) | local function EraseTable(t) | ||
for i in pairs(t) do t[i] = nil end | for i in pairs(t) do t[i] = nil end | ||
end | end | ||
Revision as of 16:23, 31 December 2007
This page documents a <i>user-defined function</i> that you can copy and paste into your addon. Replace PREFIX with your addon or lib prefix to avoid conflicts between different versions of these functions.
Erases a table, often a good way to reduce garbage creation. Note that erasing a table is generally more expensive than letting the GC system reclaim it, so one might prefer simply reallocating a new empty table. Also note that a hash (as opposed to a 1..n integer-index) will NEVER SHRINK. Each key you ever used will use ~40 bytes and keep doing so until the table is destroyed. If you re-use the same keys this is obviously a nonissue.
local function EraseTable(t) for i in pairs(t) do t[i] = nil end end