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https://github.com/sbrl/Minetest-WorldEditAdditions.git
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wea.table_filter: add API function
Really, Lua should have this already. At this rate, I'll be implementing the entire Javascript standard library... :P
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@ -69,7 +69,7 @@ end
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--- Executes the given function on every item in the given table.
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--- Executes the given function on every item in the given table.
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-- Ignores return values that are nil and doesn't insert them into the table.
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-- Ignores return values that are nil and doesn't insert them into the table.
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-- @param tbl table The table to operate on.
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-- @param tbl table The table to operate on.
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-- @param func function The function to execute on every item in the table.
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-- @param func function<any>:any|nil The function to execute on every item in the table.
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-- @returns table A new table containing the return values of the function.
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-- @returns table A new table containing the return values of the function.
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function worldeditadditions.table_map(tbl, func)
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function worldeditadditions.table_map(tbl, func)
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local result = {}
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local result = {}
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@ -79,6 +79,22 @@ function worldeditadditions.table_map(tbl, func)
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end
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end
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end
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end
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--- Filters the items in the given table using the given function.
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-- The function is executed for each item in the list. If it returns true, the
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-- item is kept. If it returns false, the item is discarded.
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-- @param tbl table The table of values to filter.
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-- @param func function<any>:bool The filter function to execute - should return a boolean value indicating whether the item provided as the first argument should be kept
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-- @returns table A new table containing the values that the given function returned true for.
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function worldeditadditions.table_filter(tbl, func)
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local result = {}
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for i,value in ipairs(tbl) do
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if func(value) then
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table.insert(result, value)
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end
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end
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return result
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end
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--- Builds a new table with the elements of the given table appearing at most once.
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--- Builds a new table with the elements of the given table appearing at most once.
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-- @param tbl table The table of values to make unique.
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-- @param tbl table The table of values to make unique.
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-- @returns table A new table containing the values of the given table appearing at most once.
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-- @returns table A new table containing the values of the given table appearing at most once.
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