RandInt-Getter

get a stochastic integer in range

נכון ליום 07-08-2021. ראה הגרסה האחרונה.

אין להתקין סקריפט זה ישירות. זוהי ספריה עבור סקריפטים אחרים // @require https://update.greatest.deepsurf.us/scripts/430439/957976/RandInt-Getter.js

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         RandInt-Getter
// @namespace    http://greatest.deepsurf.us/
// @version      0.1
// @description  get a stochastic integer in range
// @author       Cosil.C
// @license      GPL
// ==/UserScript==


document.defaultView.getRandInt = getRandInt;


/**
 * @description get a stochastic integer in range
 * @param exp pattern: [|(  -*  \d+  ,  -*  \d+  )|]
 * @returns a stochastic integer with type number in range
 */
function getRandInt(exp) {
    if ('string' != typeof exp) {
        throw 'Expression param error: the param inputed must be a string';
    }
    if (!/[\[\(]\s*-{0,1}\s*\d+\s*,\s*-{0,1}\s*\d+\s*[\]\)]/.test(exp)) {
        throw 'Expression syntax error';
    }
    let res;
    exp.replace(/([\[\(])\s*(-{0,1}\s*\d+)\s*,\s*(-{0,1}\s*\d+)\s*([\]\)])/g, (rs, $1, $2, $3, $4) => {
        let left = $1.charCodeAt(),
            min = parseInt($2.replace(/\s+/, '')),
            max = parseInt($3.replace(/\s+/, '')),
            right = $4.charCodeAt();
        if (min > max) {
            throw `Expression param error: cause ${min} > ${max}`;
        } else if (right - left == 1 && max <= min + 1) {
            throw `Expression param error: cause range is '(' and ')' but can't found any integer between ${min} and ${max}`;
        } else {
            res = min + Math.floor(Math.random() * (max - min + (right == left + 2 ? 1 : right == left + 1 ? -1 : 0))) + (left == 40 ? 1 : 0);
        }
    })
    return res;
}