locutus/esm/golang/strings/Cut.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

export function Cut(s, sep) {
    //      discuss at: https://locutus.io/golang/strings/Cut
    // parity verified: Go 1.23
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //          note 1: Includes edge cases adapted from Go's src/strings/strings_test.go.
    //       example 1: Cut('a/b/c', '/')
    //       returns 1: ['a', 'b/c', true]
    //       example 2: Cut('abc', ':')
    //       returns 2: ['abc', '', false]
    //       example 3: Cut('abc', '')
    //       returns 3: ['', 'abc', true]
    //       example 4: Cut('', '')
    //       returns 4: ['', '', true]
    const value = String(s);
    const separator = String(sep);
    const index = value.indexOf(separator);
    if (index < 0) {
        return [value, '', false];
    }
    return [value.slice(0, index), value.slice(index + separator.length), true];
}