locutus/esm/php/strings/strncmp.js

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

export function strncmp(str1, str2, lgth) {
    //       discuss at: https://locutus.io/php/strncmp/
    //  parity verified: PHP 8.3
    //      original by: Waldo Malqui Silva (https://waldo.malqui.info)
    //         input by: Steve Hilder
    //      improved by: Kevin van Zonneveld (https://kvz.io)
    //       revised by: gorthaur
    // reimplemented by: Brett Zamir (https://brett-zamir.me)
    //        example 1: strncmp('aaa', 'aab', 2)
    //        returns 1: 0
    //        example 2: strncmp('aaa', 'aab', 3 )
    //        returns 2: -1
    const s1 = (str1 + '').substr(0, lgth);
    const s2 = (str2 + '').substr(0, lgth);
    return s1 === s2 ? 0 : s1 > s2 ? 1 : -1;
}