Extracting Key:Value Pairs Assoc With Regex from String on JavaScript

var str = 'server:all, nit:4545, search:dql has map';var re = /([\w-]+):([^,]+)/g;
var m;var map = {};
while ((m = re.exec(str)) != null) {  map[m[1]] = m[2];}
console.log(map);

PHP Regex extract key-value comma separated

Well, if you can add a comma to the end of the string, I think this works:

(\w+):([^:]+),

Edit:

Jonathan Kuhn is totally right:

(\w+):([^:]+)(?:,|$)

This works

Key Value Match Group Regex where Delimiters can also be contained in quote-enclosed values

How about this?

([\w_]+)=\"(.+?)\"|([\w:\- \.]+)

• ([\w_]+) retrieves keys.
• \"(.+?)\" retrieves values enclosed by ".
• [\w:\-\s\.]+ retrieves values except for values enclosed by "
• \s is included not only space, but also newline character. So I used instead of \s.

https://regex101.com/r/4jsmYp/2

If you want to separate each line for your data, you can also use ([\w_]+)=\"(.+?)\"|[\w:\-\s\.\[\]>]+.

Regular expression for parsing name value pairs

• No escape:

  /([^=,]*)=("[^"]*"|[^,"]*)/
  

• Double quote escape for both key and value:

  /((?:"[^"]*"|[^=,])*)=((?:"[^"]*"|[^=,])*)/
  
  key=value,"key with "" in it"="value with "" in it",key=value" "with" "spaces
  

• Backslash string escape:

  /([^=,]*)=("(?:\\.|[^"\\]+)*"|[^,"]*)/
  
  key=value,key="value",key="val\"ue"
  

• Full backslash escape:

  /((?:\\.|[^=,]+)*)=("(?:\\.|[^"\\]+)*"|(?:\\.|[^,"\\]+)*)/
  
  key=value,key="value",key="val\"ue",ke\,y=val\,ue
  

Edit: Added escaping alternatives.

Edit2: Added another escaping alternative.

You would have to clean up the keys/values by removing any escape-characters and surrounding quotes.

How to Parse Repeated Name-Value Pairs using Regex in C#

You can use a simpler pattern to match all pattern occurrences in the string using Regex.Matches - all the necessary strings will already be grouped:

var text = "{token1:param1}stuff{token2}more stuff{token3:param3}";
var pattern = @"\{(?<key>[^:}]*)(?::(?<value>[^}]*))?}";
var matches = Regex.Matches(text, pattern);
foreach (Match m in matches)
{
    Console.WriteLine(m.Value);
    Console.WriteLine(m.Groups["key"].Value);
    Console.WriteLine(m.Groups["value"].Value);
}

See the C# demo and the regex demo. \{(?<key>[^:}]*)(?::(?<value>[^}]*))?} matches

• \{ - a { char
• (?<key>[^:}]*) - Group "key": zero or more chars other than : and }
• (?::(?<value>[^}]*))? - an optional non-capturing group matching : and then Group "value" matching zero or more chars other than }
• } - a } char.

How to search a string of key/value pairs in Java

Use String.split:

String[] kvPairs = "key1=value1;key2=value2;key3=value3".split(";");

This will give you an array kvPairs that contains these elements:

key1=value1
key2=value2
key3=value3

Iterate over these and split them, too:

for(String kvPair: kvPairs) {
   String[] kv = kvPair.split("=");
   String key = kv[0];
   String value = kv[1];

   // Now do with key whatever you want with key and value...
   if(key.equals("specialkey")) {
       // Do something with value if the key is "specialvalue"...
   }
}

Extracting values from keys inside multiple key-value pair arrays with dart/flutter

You could simply iterate into messages:

  var messages = [
    {
      'id': 1,
      'title': "hello",
      'global': true,
    },
    {
      'id': 2,
      'title': "bye",
      'global': false,
    },
    {
      'id': 3,
      'title': "hi",
      'global': true,
    },
  ];

  messages.forEach((element) {
    element["global"] == true ? print(element["title"]) : null;
  });

Output:

hello
hi

Extract parameter value from url using regular expressions

You almost had it, just need to escape special regex chars:

regex = /http\:\/\/www\.youtube\.com\/watch\?v=([\w-]{11})/;

url = 'http://www.youtube.com/watch?v=Ahg6qcgoay4';
id = url.match(regex)[1]; // id = 'Ahg6qcgoay4'

Edit: Fix for regex by soupagain.

Split a pipe delimited key-value pair separated by '=' symbol

The first one sounds good:

var str = "|User=0101|Name=ImNewUser|IsAdmin=0|RefId=23ae2123cd223bf235|";


var result = {};
str.split('|').forEach(function(x){
    var arr = x.split('=');
    arr[1] && (result[arr[0]] = arr[1]);
});

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