lua - 在 Lua 中解析和计算多行文本中的单词

Question

假设我有多行文本：

  str = [[
  The lazy dog sleeping on the yard.
  While a lazy old man smoking.
  The yard never green again.
  ]]

我可以使用以下方法拆分每个单词：

 for w in str:gmatch("%S+") do print(w) end

但是我怎样才能得到结果作为一个例子：

The = 3 words, line 1,3
Lazy = 2 words, line 1,2
Dog = 1 word, line 1
..and so on?

谢谢

标签： lua

Answer 1

您可以像已经在计算单词一样检测到\n使用情况。gmatch

模式类似于"[^\n]+"，代码类似于：

local str = [[
The lazy dog sleeping on the yard.
While a lazy old man smoking.
The yard never green again.
]]
local words = {}
local lines = {}
local line_count = 0

for l in str:gmatch("[^\n]+") do
  line_count = line_count + 1
  for w in l:gmatch("[^%s%p]+") do 
    w = w:lower()
    words[w] = words[w] and words[w] + 1 or 1
    lines[w] = lines[w] or {}
    if lines[w][#lines[w]] ~= line_count then
      lines[w][#lines[w] + 1] = line_count
    end
  end
end


for w, count in pairs(words) do
  local the_lines = ""
  for _,line in ipairs(lines[w]) do
    the_lines = the_lines .. line .. ','
  end
  --The = 3 words, line 1,3 
  print(w .." = " .. count .. " words , lines " .. the_lines)
end

完整输出，请注意，我还将您用于捕获单词的模式更改为"[^%s%p]+"我这样做是为了消除与.吸烟、再次和院子的联系。

smoking = 1 words , lines 2,
while = 1 words , lines 2,
green = 1 words , lines 3,
never = 1 words , lines 3,
on = 1 words , lines 1,
lazy = 2 words , lines 1,2,
the = 3 words , lines 1,3,
again = 1 words , lines 3,
man = 1 words , lines 2,
yard = 2 words , lines 1,3,
dog = 1 words , lines 1,
old = 1 words , lines 2,
a = 1 words , lines 2,
sleeping = 1 words , lines 1,