local dictionary = {}
function dictionary.create(keycomparer, dic)
local keyvaluepairs = {}
local comparer
if dic == nil then
comparer = keycomparer or function(k1, k2) return k1 == k2 end
else
comparer = keycomparer or dic.comparer
for i, pair in ipairs(dic.keyvaluepairs) do
table.insert(keyvaluepairs, { key = pair.key, value = pair.value })
end
end
local prototype = { comparer = comparer, keyvaluepairs = keyvaluepairs }
prototype.add = dictionary.add
prototype.remove = dictionary.remove
prototype.hasKey = dictionary.hasKey
prototype.enum = dictionary.enum
prototype.getValue = dictionary.getValue
prototype.setValue = dictionary.setValue
prototype.tryAdd = dictionary.tryAdd
prototype.tryRemove = dictionary.tryRemove
prototype.tryGetValue = dictionary.tryGetValue
prototype.trySetValue = dictionary.trySetValue
return prototype
end
function dictionary.add(dic, key, value, ...)
if dic == nil then error("参数dic为空。") end
if dic:hasKey(key, ...) then
error("字典中已经存在这个键。")
end
table.insert(dic.keyvaluepairs, { key = key, value = value })
return dic
end
function dictionary.tryAdd(dic, key, value, ...)
return pcall(dictionary.add, dic, key, value, ...)
end
function dictionary.remove(dic, key, ...)
if dic == nil then error("参数dic为空。") end
local index
for i, pair in ipairs(dic.keyvaluepairs) do
if dic.comparer(pair.key, key, ...) then
index = i
break
end
end
if index ~= nil then table.remove(dic.keyvaluepairs, index) end
return dic
end
function dictionary.tryRemove(dic, key, ...)
return pcall(dictionary.remove, dic, key, ...)
end
function dictionary.enum(dic)
if dic == nil then error("参数dic为空。") end
return ipairs(dic.keyvaluepairs)
end
function dictionary.hasKey(dic, key, ...)
if dic == nil then error("参数dic为空。") end
for i, pair in ipairs(dic.keyvaluepairs) do
if dic.comparer(pair.key, key, ...) then
return true
end
end
return false
end
function dictionary.getValue(dic, key, ...)
if dic == nil then error("参数dic为空。") end
for i, pair in ipairs(dic.keyvaluepairs) do
if dic.comparer(pair.key, key, ...) then
return pair.value
end
end
error("字典中找不到这个键。")
end
function dictionary.tryGetValue(dic, key, ...)
return pcall(dictionary.getValue, dic, key, ...)
end
function dictionary.setValue(dic, key, value, ...)
if dic == nil then error("参数dic为空。") end
local index
for i, pair in ipairs(dic.keyvaluepairs) do
if dic.comparer(pair.key, key, ...) then
index = i
break
end
end
if index == nil then
error("字典中找不到这个键。")
else
dic.keyvaluepairs[index] = value
end
end
function dictionary.trySetValue(dic, key, value, ...)
return pcall(dictionary.setValue, dic, key, value, ...)
end
return dictionary
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