Separate by individual words or symbols using regex

Question

Separate by individual words or symbols using regex

Can someone assist me in precisely breaking down the expression

-(ab | c) & d -> (d|c)&e <-> f

into individual elements within an array?

['-', '(', 'ab', '|', 'c', ')', '&', 'd', '->', '(', 'd', '|', 'c', ')', '&', 'e', '<->', 'f']

I require the string to be divided into tokens, where a combination of letters like ab should be treated as one token. The operators I have include -, (, ), |, &, ->, and <->.

An approach might resemble

var str = '-(ab | c) & d -> (d|c)&e <-> f';
var regex = /([-&\|()]|\w+)/;
str.split(regex);

However, this method does not account for -> and <->

javascript regex tokenize

Answer 1

Answer №1

Here is a regular expression you can use for splitting strings:

var str = '-(ab | c) & d -> (d|c)&e <-> f';
var arr = str.split(/\s*(<?->|[-&|()]|\w+)\s*/).filter(Boolean)

console.log(arr)
//=> ["-", "(", "ab", "|", "c", ")", "&", "d", "->", "(", "d", "|", "c", ")", "&", "e", "<->", "f"]

Explained Breakdown:

\s*         # match 0 or more spaces
(           # group spart
   <?->     # match <-> or ->
   |        # OR
   [-&|()]  # match one of these symbols
   |        # OR
   \w+      # match 1 or more word chars
)           # group end
\s*         # match 0 or more spaces

Answer 2

Here is a regular expression you can use for splitting strings:

var str = '-(ab | c) & d -> (d|c)&e <-> f';
var arr = str.split(/\s*(<?->|[-&|()]|\w+)\s*/).filter(Boolean)

console.log(arr)
//=> ["-", "(", "ab", "|", "c", ")", "&", "d", "->", "(", "d", "|", "c", ")", "&", "e", "<->", "f"]

Explained Breakdown:

\s*         # match 0 or more spaces
(           # group spart
   <?->     # match <-> or ->
   |        # OR
   [-&|()]  # match one of these symbols
   |        # OR
   \w+      # match 1 or more word chars
)           # group end
\s*         # match 0 or more spaces

Answer 3

Answer №2

What do you think about this?

var string = '-(ab | c) & d -> (d|c)&e <-> f';
    
var result = string.match(/<->|->|[-()|&]|\w+/g);

console.log(result);

You have the opportunity to utilize the [] and | operators. For more information, check out JavaScript regex on MDN.

Answer 4

What do you think about this?

var string = '-(ab | c) & d -> (d|c)&e <-> f';
    
var result = string.match(/<->|->|[-()|&]|\w+/g);

console.log(result);

You have the opportunity to utilize the [] and | operators. For more information, check out JavaScript regex on MDN.

Answer 5

Answer №3

If you need to extract specific patterns from a string, you can utilize a regex pattern like this:

/<?->|[^\s\w]|\w+/g

This regex will match any non-whitespace or non-word character, assuming the strings do not contain unnecessary characters. If they do, you can use a modified version of the regex like so:

/<?->|[-()|&]|\w+/g

For a demonstration and testing tool, check out the regex demo and try it out in the JavaScript demo provided below:

var re = /<?->|[-()|&]|\w+/g;
console.log("-(ab | c) & d -> (d|c)&e <-> f".match(re));

Explanation of the Pattern:

<?-> - an optional combination of '<' followed by '-' and then '>'.
| - represents 'or' operator.
[^\s\w] - matches any symbol other than whitespace and word characters.
OR
[-()|&] - matches one symbol among '-', '(', ')', '|', and '&’
| - represents 'or' operator.
\w+ - matches one or more word characters.

By using the global modifier with String#match, you can retrieve an array of all matched values based on the given regex pattern.

Answer 6

If you need to extract specific patterns from a string, you can utilize a regex pattern like this:

/<?->|[^\s\w]|\w+/g

This regex will match any non-whitespace or non-word character, assuming the strings do not contain unnecessary characters. If they do, you can use a modified version of the regex like so:

/<?->|[-()|&]|\w+/g

For a demonstration and testing tool, check out the regex demo and try it out in the JavaScript demo provided below:

var re = /<?->|[-()|&]|\w+/g;
console.log("-(ab | c) & d -> (d|c)&e <-> f".match(re));

Explanation of the Pattern:

<?-> - an optional combination of '<' followed by '-' and then '>'.
| - represents 'or' operator.
[^\s\w] - matches any symbol other than whitespace and word characters.
OR
[-()|&] - matches one symbol among '-', '(', ')', '|', and '&’
| - represents 'or' operator.
\w+ - matches one or more word characters.

By using the global modifier with String#match, you can retrieve an array of all matched values based on the given regex pattern.

Separate by individual words or symbols using regex

Answer №1

Answer №2

Answer №3

Similar questions

What is the process for accessing the gallery in phonegap on an android device?

After using JSON.parse(), backslashes are still present

Fill a Vuetify select component with options from a JSON array

Improving Regular Expressions in Oracle

Passing a variable in an AngularJS $http.get() call to retrieve a specific section of a JSON data file

Various style sheets are used for the production and staging environments

jQuery regex failing to display latest changes

"Troubleshooting why the form editing feature is not functioning properly in React

What is the best way to implement destructuring assignment in the map function?

acquire information from a variable using angularjs

Moving from one page to another

How can regular expressions help resolve "Notice: Use of undefined constant"?

Extracting dynamic content from a webpage using Selenium with Javascript rendering capabilities

Unable to fix the unhandled reference error

The dropdown options for the input type file in Vuejs PWA are not appearing

Highlighting table column when input is selected

Discovering the number of intervals running at any given time within the console - JavaScript

angular2 : problem encountered with communication to rest api

Tips for properly invoking a function from one component to another component

Creating new DOM elements based on the value of an input