Regular expressions

Wing offers built-in support for regular expressions. Here are some examples of common regexp-related tasks in Wing.

main.w

let r = regex.compile("p([a-z]+)ch");

// Checks if the regular expression matches the provided text.
log(r.test("peach"));

// Finds the first occurrence of the pattern within the text.
log(r.find("peach peach") ?? "");

// Finds all non-overlapping occurrences of the pattern within the text.
log(Json.stringify(r.findAll("peach punch pinch")));

// Finds the start and end index of all matches within the text.
log(Json.stringify(r.findAllIndex("peach punch pinch")));

// Finds the start and end index of the first match within the text.
log(Json.stringify(r.findIndex("peach")));

// Finds the first match and its submatches.
log(Json.stringify(r.findSubmatch("peach punch")));

// Finds the start and end index of the match and all submatches.
log(Json.stringify(r.findSubmatchIndex("peach punch")));

// Replaces all occurrences of the match with a replacement string.
log(r.replaceAll("a peach", "<fruit>"));

Wing console output

# Run locally with wing console
wing it

true
peach
["peach","punch","pinch"]
[[0,5],[6,11],[12,17]]
[0,5]
["peach","ea"]
[[0,5],[1,3]]
a