locutus/rust/str/split_inclusive.js

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

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.split_inclusive = split_inclusive;
function split_inclusive(delimiter, str) {
    //      discuss at: https://locutus.io/rust/split_inclusive/
    // parity verified: Rust 1.85
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //          note 1: Splits by delimiter and keeps delimiter as suffix of each non-final match chunk.
    //       example 1: split_inclusive(',', 'a,b,c')
    //       returns 1: ['a,', 'b,', 'c']
    //       example 2: split_inclusive('::', 'x::y::z')
    //       returns 2: ['x::', 'y::', 'z']
    //       example 3: split_inclusive('', 'ab')
    //       returns 3: ['', 'a', 'b']
    const haystack = String(str);
    const needle = String(delimiter);
    if (needle === '') {
        return ['', ...Array.from(haystack)];
    }
    const out = [];
    let start = 0;
    while (start < haystack.length) {
        const found = haystack.indexOf(needle, start);
        if (found < 0) {
            out.push(haystack.slice(start));
            break;
        }
        const end = found + needle.length;
        out.push(haystack.slice(start, end));
        start = end;
    }
    return out;
}