正則表達式解析可能引用表示的參數

Question

我想解析Javascript中的!Name=John OR !Address="1234 Place Lane" AND tall，如果前面有!或其他簡單字符串，則將「參數」提取爲鍵/值。示例代碼如下：

1 var input = '!Name=John OR !Address="1234 Place Lane" AND tall'; 
2 var params = input.match(/.../g); // <--?? what is the proper regex? 
3 var i = params.length; 
4 while(i--) { 
5 params[i] = params[i].replace(/"/g.""); 
6 if(params[i].indexOf("!")==0) { 
7  params[i] = params[i].substring(1); 
8  // Address=1234 Place Lane 
9  var position = params[i].indexOf('='); 
10  var key = params[i].substring(0,position); 
11  var value = params[i].substring(1+position); 
12  params[i] = {"key": key, "value": value}; 
13  // {key: "Address", value: "1234 Place Lane"} 
14  // {key: "Name", value: "John"} 
15 } 
16 } 
17 // params = [ {key:"Name",value:"John"}, "OR", {...}, "AND", "tall" ]; 

相關問題：javascript split string on space or on quotes to array

Answer 1

說明

考慮一個正則表達式的下面的powershell例子。

(?i)(?:\sor\s|\sand\s|^)!?([^=]*)(?:=?["]?([^"]*)["]?)?(?=\sor\s|\sand\s|$)see also link

例

$Matches = @() 
$String = '!Name=John OR !Address="1234 Place Lane" AND tall' 
Write-Host start with 
write-host $String 
Write-Host 
Write-Host found 
([regex]'(?i)(?:\sor\s|\sand\s|^)!?([^=]*)(?:=?["]?([^"]*)["]?)?(?=\sor\s|\sand\s|$)').matches($String) | foreach { 
    write-host "key at $($_.Groups[1].Index) = '$($_.Groups[1].Value)'`t= value at $($_.Groups[2].Index) = '$($_.Groups[2].Value)'" 
    } # next match 

息率

start with 
!Name=John OR !Address="1234 Place Lane" AND tall 

found 
key at 1 = 'Name' = value at 6 = 'John' 
key at 15 = 'Address' = value at 24 = '1234 Place Lane' 
key at 45 = 'tall' = value at 49 = '' 

摘要

您將需要繼續使用原來的邏輯，你正在做的鍵/值組和構建你的價值集和測試看有沒有價值實際上存在

• (?i)確保案件不敏感
• (?:\sor\s|\sand\s|^)需要一個字符串的開頭開始，「或」，或者「和」。兩者「或」與「和」需要一個空格
• !?消耗exclamination點，如果它存在
• ([^=]*)回報這是不相等的跡象
• (?:所有字符開頭的非捕獲組包圍
• =?消耗，如果它存在
• ["]?消耗的報價，如果它使用貪婪搜索
存在
• ([^"]*)捕獲所有非引用等號
• ["]?消耗的報價，如果它存在
• )關閉非捕獲組
• ?使不需要
• (?=\sor\s|\sand\s|$)搜索下「和」整個非捕獲組，「或」，或結束串。這迫使貪婪捕獲停止在和/或/和/或斷開尾部