bahmanm

let group_by (f : 'a -> 'b) (ll : 'a list) : ('b, 'a list) Hashtbl.t =
  List.fold_left
    (fun acc e ->
       let grp = f e in
       let grp_mems = try Hashtbl.find acc grp with Not_found -> [] in
       Hashtbl.replace acc grp (e :: grp_mems);
       acc)
    (Hashtbl.create 100)
    ll;;

bahmanm

/**
 * @author Bahman Movaqar <Bahman AT BahmanM.com>
 */
@Grab('org.jsoup:jsoup:1.8.2')
import static org.jsoup.Jsoup.parse

def cookieManager = new CookieManager(null, CookiePolicy.ACCEPT_ALL)
CookieHandler.setDefault(cookieManager)
def doc = parse(
  new URL('https://www.packtpub.com/packt/offers/free-learning').text

bahmanm

#lang racket
;;;
;;; Author: Bahman Movaqar <Bahman AT BahmanM.com>
;;;
(require net/url)
(require sxml)
(require net/uri-codec)
(require net/http-client)
(require (planet neil/html-parsing))
(require net/cookies)

bahmanm

; Copyright Bahman Movaqar <Bahman AT BahmanM.com>
; Source -> https://github.com/bahmanm/touka/blob/master/misc.scm
; Tests -> https://github.com/bahmanm/touka/blob/master/tests/misc-tests.scm

;; Collects the CAR of each list in the given list of lists!
(define (cars list-of-lists)
  (map car list-of-lists))

;; Collects the CDR of each list in the given list of lists!
(define (cdrs list-of-lists)

bahmanm

;;; A quick way to run JUnit tests:
;;; `C-x t u` runs all the test cases in a unit.
;;; `C-x t c` runs a single test case.
;;;
;;; Simply add the snippet at the end of `init.el` or `.emacs`.
;;; NOTE: It assumes you are using projectile to manage the project.
;;;
;;; By Bahman Movaqar

;; runs all test cases in the current class

bahmanm

/*
 * Solve the equation A + B = CD - E = FG
 *   WHERE A..G in [0,1,2,3,7,8,9]
 *   AND CD = 10*C + D
 *   AND FG = 10*F + G
 *   AND C not 0 and F not 0
 *   AND different letters are different digits
 */ 

[0,1,2,3,7,8,9].permutations().findAll {                                                 

bahmanm

/*
 * Author: Bahman Movaqar <Bahman AT BahmanM.com>
 * Copyright (c) Bahman Movaqar
 * This file is released under public domain license.
 */
///// Tests below the main class

import groovy.transform.PackageScope

/**

bahmanm

List kCombinations(List l, Integer k) {
    assert k >= 0, 'Invalid "k"'
    if (l.empty || !k) []
    else if (k == 1) l.collate(1)
    else
        (0..l.size()-1).inject([] as Set) { acc, i ->
            def c = kCombinations(l.drop(i+1), k-1)
            acc + [l[i], c].combinations { cn ->
                def cnf = cn.flatten()
                cnf.size() == k ? cnf : [l[i],c].flatten()

bahmanm

; Suppose you have a CSV file with the first row being the column names
; and the rest being data.  Using the following snippet you can process
; the contents passing each row's contents as keyword arguments to
; another function.
;
; Example CSV structure:
; +----------------------------------------------------------+
; |  customer-code  |  name  |  e-mail  |  address  | phone  |
; +----------------------------------------------------------+
;

bahmanm

(defn getfn [fname]
  "Gets a function by its fully qualified name."
  (let [fsym (symbol fname)
        nsym (symbol (namespace fsym))]
    (require nsym)
    (resolve fsym)))

(defn interpolate [s vals]
  "Returns the interpolation of string 's' with a map of key/values."
   ;Keys in 's' are marked with #{key-name} syntax.