【入门夯实】单词计数：分词结果的词频统计封装

local s = "攻沙 攻沙 守城 攻沙"
-- 双重循环：每个单词再遍历已收集单词比对

local s = "攻沙 攻沙 守城 攻沙"
local freq = {}
for w in string.gmatch(s, "%S+") do
    freq[w] = (freq[w] or 0) + 1
end
for w, c in pairs(freq) do
    print(w, c)
end

local words = {}
for w, c in pairs(freq) do
    words[#words + 1] = { w = w, c = c }
end
table.sort(words, function(a, b) return a.c > b.c end)
print(words[1].w, words[1].c)