使用 Google Sheets Re2 正则表达式语法提取匹配地址

Question

我正在尝试提取 Google 表格单元格中公式中出现的所有 cell/range 地址。

天生的公式可能非常复杂。我尝试了很多模式，这些模式适用于网络测试人员，但不适用于 google sheets re2.

以下示例显示了两个问题。也许我误读了匹配结果，但据我了解是 4 个匹配项。

公式（忽略逻辑）：

=A:B4+$BC+$DE2+F2:G2

正则表达式：

(($?[A-Z]+$?\d+)(:($?[A-Z]+$?\d+))?)

预期结果：

[A:B4,$BC,$DE2,F2:G2]

Here（如果我没有误读结果）看起来不错。我不确定显示的组匹配是否也被认为是匹配“4个匹配，287步”

但是在 google sheet 中 returns 所有 匹配 1 结果

[A:B4,A,:B4,B4]

忽略其他匹配项所以我想问题是如何将正则表达式转换为 re2 语法？

更新： 跟着player0的评论，可能我没说清楚。这只是一个简单的例子，以隔离我遇到的其他问题。这只是一个字符串，包含一些相对和绝对格式的地址。但是，我正在寻找一个更广泛的通用解决方案，它将适合任何可能包含公式和对其他 sheet 的引用的可能公式。例如：

=(STDEVA(Sheet1!B2:B5)+sum($A:$A))*B2

这里的预期结果是Sheet1!B2:B5,$A:$A,B2

此公式包含两个公式并引用了另一个sheet。在这里仍然忽略命名范围和我目前无法想到的其他公式可能的引用。此外，方括号 [] 无关紧要，它只是显示结果的方式，实际上是从日志中复制的，因为它全部在脚本中完成。

Answer 1

好像可以用

[A-Z$]+\d+(?::[A-Z$]\d+)?

见a demo on regex101.com。

Answer 2

尝试：

=INDEX(SUBSTITUTE(TEXTJOIN(",", 1, 
 IFNA(REGEXEXTRACT(SPLIT(SUBSTITUTE(FORMULATEXT(A3), "'", "♥"), 
 "+-*/^()=<>&"), 
 "(?:.+!)?[A-Z$]+\d+(?::[A-Z$](?:\d+)?)?|(?:.+!)?[A-Z$]:[A-Z$]+"))), "♥", "'"))

或更长：

=INDEX(SUBSTITUTE(TEXTJOIN(",", 1, 
 IFNA(IFNA(REGEXEXTRACT(SPLIT(SUBSTITUTE(FORMULATEXT(A3), "'", "♥"), 
 "+-*/^()=<>"), "(?:.+!)?[A-Z$]+\d+(?::[A-Z$](?:\d+)?)?"), 
 REGEXEXTRACT(SPLIT(SUBSTITUTE(FORMULATEXT(A3), "'", "♥"), 
 "+-*/^()=<>"), "(?:.+!)?[A-Z$]:[A-Z$]+")))), "♥", "'"))

Answer 3

我想出了一个更好的方法，不用拆分，就是使用 /g 标志。但是，这在脚本中起作用，而不是通过使用表格内部正则表达式函数（即 REGEXEXTRACT），因为我不知道如何在包含 /g 标志和 [= 的单元格中格式化正则表达式字符串12=] 将作为有效的正则表达式接受。

代码如下：

/* Find all predessesor cells of input range 
*/
function findPredecessor(rng){
 
  var formualaText = rng.getFormula();
  
  /* addMatchesRegex
  * supports all A1Notation addresses 
  * the 2nd regex after the | operator will match all column addresses (A:A, Sheet2!b:B, etc)
  * some NamedRanges with names like NameRange1 
  * Does not support - NamedRange with names including dot, not ending with digits 
  */
  var addMatchesRegex = /(([\w .'!]+)?($?[A-Z]+$?\d+\b)(:($?[A-Z]+$?\d+))?)|([\w .'!]+)?[A-Z]+:[A-Z]+/gi; 
     
  var addMatches = formualaText.match(addMatchesRegex);
  
  Logger.log("%s add matched: %s",addMatches.length,addMatches);
  
  /* fullMatchRegex
  *  modify addMatches to return also strings like
  * 1. SUM, IFERROR, etc - internal sheets functions.
  * 2. NamedRanges
  * 
  */
  var fullMatchRegex = /(([\w .'!]+)?([$A-Z.\d]*)(:($?[A-Z]+$?\d*))?)/gi; 
  
  // match regex with formula
  var fullMatches =  formualaText.match(fullMatchRegex);
    
  Logger.log("Full matches list: %s",fullMatches);
  
  var namedRangesAdd = analyzeMatch(addMatches,fullMatches);
    
  Logger.log("%s total predecessors: %s",namedRangesAdd.length,namedRangesAdd);
}



/* This function accepts the two regex matches list
*  and returns one unique list of all predecessor addresses
*  @param {Array} addMatches - All A1 notation addresses 
*                              plus some of NamedRanges 
*  @param {Array} fullMatches - All A1 notation addresses,All NamedRanges,
*                               Other irrelevent matches
*/
function analyzeMatch(addMatches,fullMatches){

  /*Expected 
    First parameter - holds all A1Notation addresses as well as NamedRanges that
    their name in the form of /[A-Z]+/d+
    NamedRange with name including dot(.) or does not contain digits will not
    be on the list
    Second Parameter - contains all first list matches, as well as all NamedRanges
    names and also irrelevant matches to be filtered like function names and empty string 
  */
  
  //Full Matched Addresses to be returned
  var mAddresses = [];
  
  //Remove duplicate addresses
  var uniqueMatches = 
      addMatches.filter((item,index)=>addMatches.indexOf(item)===index); 
  
  //Get all named Ranges in spread sheet
  var nr = SpreadsheetApp.getActive().getNamedRanges();
  
  // Loop Named Ranges arr 
  nr.forEach(function(item){
  
    /* Check if the name of the current Named Range
    * is included in matches
    * 1. first in addMatches list
    * 2. only if not found in the wider list */
    
    var name = item.getName();
    
    //Check if in addmatches array
    var i = uniqueMatches.indexOf(name);
    
    //Build A1Notation address of current NamedRange 
    var rng = item.getRange();
    var add = "'" + rng.getSheet().getName() + "'!" + rng.getA1Notation();    
    
    if (i > -1){
      
      //Add the address of curr NamedRange to final list 
      mAddresses.push(add);
      //Remove curr NamedRange from list
      uniqueMatches.splice(i,1);
      
    }else if (fullMatches.includes(name)){
      // Name found - add the address of the 
      //              Named Range to matched Addresses list
      
      mAddresses.push(add);    
    }
    
  });
  
  //Add all left matched addresses to final list  
  mAddresses.push(...uniqueMatches);
  
  return mAddresses;
   
}

让它变得有点复杂的是 NamedRanges。此代码将匹配并分析 returns 一个包含所有前任地址的列表，包括 NamedRanges 的地址。

使用 Google Sheets Re2 正则表达式语法提取匹配地址

Extract matching addresses using Google Sheets Re2 regular expression syntax

regex

google-sheets

re2

google-sheets-formula