crypto_pals/utils.ts

import * as fs from 'node:fs';
import { Encoding } from 'node:crypto';

// @ts-ignore
export const range = (from: number, to: number) => [...Array(to - from + 1).keys()].map(i => i + from);

export const englishFreqs = {
    97:  0.08167, 98:  0.01492, 99:  0.02782, 100: 0.04253,
    101: 0.12702, 102: 0.02228, 103: 0.02015, 104: 0.06094,
    105: 0.06094, 106: 0.00153, 107: 0.00772, 108: 0.04025,
    109: 0.02406, 110: 0.06749, 111: 0.07507, 112: 0.01929,
    113: 0.00095, 114: 0.05987, 115: 0.06327, 116: 0.09056,
    117: 0.02758, 118: 0.00978, 119: 0.02360, 120: 0.00150,
    121: 0.01974, 122: 0.00074, 32: 0.13000,
};

type FileToBuff = (fName: string, encoding: Encoding, shouldSplit?: boolean) => Buffer[];
export const fileToBuff: FileToBuff = (fName, encoding, shouldSplit = true) => {
    const data = fs.readFileSync(fName, 'utf-8');
    const dataLines = shouldSplit ? data.split('\n').map(s => s.trim()) : [data.trim()];

    return dataLines.map(x => Buffer.from(x, encoding));
};