Question

我正在编写一个简单的脚本来搜索TODO：和FIXME的文档：并返回匹配和行号。我有一个（非常糟糕的）版本工作，我现在想知道如何正确地做到这一点。

我需要转过身来：

todo: alpha
bravo
fixme: charlie
fixme: delta
echo
frank
todo: golf

进入这个：

1 - todo: alpha
7 - todo: golf
3 - fixme: charlie
4 - fixme: delta

请注意，编号结果按标记排序。

Answer 1

这是一种方式：

doc = <<DOC
todo: alpha
bravo
fixme: charlie
fixme: delta
echo
frank
todo: golf
DOC

doc.split("\n").map.with_index {|s,i| [i,s]}.select {|(i,s)| s.include?("todo:")|| \
  s.include?("fixme:")}.sort_by(&:last).map {|(i, s)| "#{i+1} - " + s}

   => ["3 - fixme: charlie",
       "4 - fixme: delta",
       "1 - todo: alpha",
       "7 - todo: golf"]

按步骤：

s1 = doc.split("\n").map.with_index {|s,i| [i,s]}
 => [[0, "todo: alpha"], [1, "bravo"], [2, "fixme: charlie"],
     [3, "fixme: delta"], [4, "echo"], [5, "frank"], [6, "todo: golf"]] 
s2 = s1.select {|(i,s)| s.include?("todo:") || s.include?("fixme:")}
 => [[0, "todo: alpha"], [2, "fixme: charlie"],
     [3, "fixme: delta"], [6, "todo: golf"]] 
s3 = s2.sort_by(&:last) # Equivalent to s2.sort_by {|a| a.last}
 => [[2, "fixme: charlie"], [3, "fixme: delta"],
     [0, "todo: alpha"], [6, "todo: golf"]] 
s3.map {|(i, s)| "#{i+1} - " + s}
 => ["3 - fixme: charlie", "4 - fixme: delta",
     "1 - todo: alpha", "7 - todo: golf"]

原始TODO和FIXME脚本

1 个答案: