epervier-old/framework/utils/table.lua

-- loveutils.table : simple functions for table manipulation and computation.

--[[
  Copyright © 2021 Kazhnuz

  Permission is hereby granted, free of charge, to any person obtaining a copy of
  this software and associated documentation files (the "Software"), to deal in
  the Software without restriction, including without limitation the rights to
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  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
]]

local Table = {}
local Bools = require "framework.utils.bools"

--- Get the sum of a liste of number
---@param table table the table which you want to find if it contain the content
---@param content any the content that you want to find in the table
---@return boolean contain if the table contain the content
function Table.contain(table, content)
  for k, v in ipairs(table) do
    if (v == content) then
      return true
    end
  end
  return false
end

--- Get the table in form of a string
---@param table table the table which you want to transform into a string
---@return string string the string created from the table
function Table.toString(table, depth)
  depth = depth or 2
  local string = "{"
  for key, value in pairs(table) do
    if (type(value) ~= "userdata" and depth > 0) then
      if (type(value) == "table") then
        if (value.is ~= nil) then
          string = string .. "Object"
        end
        string = string .. Table.toString(value, depth - 1)
      elseif (type(value) == "boolean") then
        string = string .. Bools.toString(value)
      else
        string = string .. value
      end
      string = string .. ","
    end
  end
  return string .. "}"
end

--- Clone a table
---@param table1 table the table to clone
---@return table returnTable the cloned table
function Table.clone(table1)
  local returnTable = {}
  for key, value in pairs(table1) do
    returnTable[key] = value
  end
  return returnTable
end

--- Merge two list
---@param table1 table the first list to merge
---@param table2 table the list that you want to merge to the first
---@return table table1 the first list, merged with the second
function Table.mergeList(table1, table2)
  for i, value in ipairs(table2) do
    table.insert(table1, value)
  end
  return table1
end

--- Merge two table
---@param table1 table the first table to merge
---@param table2 table the table that you want to merge to the first
---@return table table1 the first table, merged with the second
function Table.merge(table1, table2)
  for key, value in pairs(table2) do
    table1[key] = value
  end
  return table1
end

--- Reduce a list with a function
---@param list table the list you want to reduce
---@param fn function a function to apply to the whole list. Args: the first reduced list & the current value
---@return any acc the result of the reducing
function Table.reduce(list, fn)
  local acc
  for k, v in ipairs(list) do
      if 1 == k then
          acc = v
      else
          acc = fn(acc, v)
      end
  end
  return acc
end

--- Get the sum of a liste of number
---@param table table the list to parse into an sum
---@return number sum the sum of the table
function Table.sum(table)
  local sum = 0
  for _, v in pairs(table) do
    sum = sum + v
  end

  return sum
end

--- Get the average of a liste of number
---@param table table the list to parse into an average
---@return number average the average of the table
function Table.average(table)
  return Table.sum(table) / #table
end

--- Parse a basic list into a structured table. Return an error if the number of arguments is not the same
---@param table table the list to parse into a table
---@param structure table the structure to create the table : each name correspond to an attribute of the parsed table
---@param nullableNbr integer the number of nullable argument (at the end of the functions) (can be null)
---@return table parsedTable the parsed table
function Table.parse(table, structure, nullableNbr)
  local parsedTable = {}
  assert(table ~= nil, "The table to parse can't be null")
  assert(structure ~= nil, "The table structure can't be null")
  nullableNbr = nullableNbr or 0

  if ((#table) > (#structure)) or ((#table) < (#structure - nullableNbr)) then
    error("The table to parse " .. Table.toString(table) ..
      " doesn't have the right number of arguments: " .. #table ..
      " instead of " .. #structure ..
      " and " .. nullableNbr .. " nullables")
  else
    for i, key in ipairs(structure) do
      parsedTable[key] = table[i]
    end
  end

  return parsedTable
end

function Table.remove(table, funcDelete)
  -- Code from https://stackoverflow.com/questions/12394841/safely-remove-items-from-an-array-table-while-iterating
  local j, n = 1, #table;

  for i=1,n do
      if (not funcDelete(table[i], i, j)) then
          -- Move i's kept value to j's position, if it's not already there.
          if (i ~= j) then
              table[j] = table[i];
              table[i] = nil;
          end
          -- Increment position of where we'll place the next kept value.
          j = j + 1;
      else
          table[i] = nil;
      end
  end

  return table;
end

return Table