Usage.ipynb

{
 "cells": [
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   "execution_count": 1,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[None]"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "(require [hyiter.core [itr]])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "spam\n",
      "spam\n",
      "spam\n",
      "spam\n",
      "spam\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; repeat clause\n",
    "(itr\n",
    "  (repeat 5)\n",
    "  (print \"spam\"))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1\n",
      "2\n",
      "3\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; loop on iterable \n",
    "(itr\n",
    "  (for i in '(1 2 3))\n",
    "  (print i))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[1, 2, 3]\n",
      "[2, 3]\n",
      "[3]\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[None, []]"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; arbitrary consuming(or transforming) function\n",
    "(defn cdr [lst]\n",
    "  (list (rest lst)))\n",
    "\n",
    "(itr\n",
    "  (for x = [1 2 3] then (cdr x))\n",
    "  (if x\n",
    "      (print x)\n",
    "      (break)))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "0\n",
      "2\n",
      "4\n",
      "6\n",
      "8\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; while clause\n",
    "(itr\n",
    "  (for i = 0 then (+ i 2))\n",
    "  (while (< i 10))\n",
    "  (print i))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "5\n",
      "6\n",
      "7\n",
      "8\n",
      "9\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; drop clause\n",
    "(itr\n",
    "  (drop 5)\n",
    "  (for i in (range 10))\n",
    "  (print i))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "5\n",
      "6\n",
      "7\n",
      "8\n",
      "9\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; drop while clause\n",
    "(itr\n",
    "  (dropwhile (< i 5))\n",
    "  (for i in (range 10))\n",
    "  (print i))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[2, 4, 6]\n",
      "[4, 6]\n",
      "[6]\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; dependent parallel variables\n",
    "(itr\n",
    "  (for x = '(1 2 3) then (cdr x))\n",
    "  (for y = (list (map (fn [el] (* el 2)) x)))\n",
    "  (if x\n",
    "      (print y)\n",
    "      (break)))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "LOOP Start!\n",
      "1\n",
      "2\n",
      "3\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; initial proc\n",
    "(itr\n",
    "  (initially\n",
    "    (print \"LOOP Start!\"))\n",
    "  (for i in '(1 2 3))\n",
    "  (print i))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1\n",
      "2\n",
      "3\n",
      "LOOP Finish!\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; final proc\n",
    "(itr\n",
    "  (for i in '(1 2 3))\n",
    "  (print i)\n",
    "  (finally\n",
    "    (print \"LOOP Finish!\")))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1\n",
      "2\n",
      "3\n",
      "1\n",
      "2\n",
      "3\n",
      "1\n",
      "2\n",
      "3\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; nested loop\n",
    "(itr\n",
    "  (for i in '(1 2 3))\n",
    "  (itr\n",
    "    (for j in '(1 2 3))\n",
    "    (print j)))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[0, 20, 40, 60, 80]\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[None]"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; collecting items into (python)list\n",
    "(print (itr\n",
    "         (for i in (range 10))\n",
    "         (when (= (% i 2) 0)\n",
    "           (collect (* 10 i)))))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[0, 2, 4, 6, 8]\n",
      "[1, 3, 5, 7, 9]\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; collecting items into accumulator\n",
    "(itr\n",
    "  (for i in (range 10))\n",
    "  (if (= (% i 2) 0)\n",
    "      (collect i into evns)\n",
    "      (collect i into odds))\n",
    "  (finally\n",
    "    (print evns)\n",
    "    (print odds)))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[0, 0, 1, 0, 1, 2]\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[None]"
      ]
     },
     "execution_count": 14,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; appending list items into (python) list\n",
    "(print (itr\n",
    "         (for i in (range 1 4))\n",
    "         (append (list (range i)))))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "9\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[None]"
      ]
     },
     "execution_count": 15,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; maximizing\n",
    "(print (itr\n",
    "         (for i in (range 10))\n",
    "         (maximize i)))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "0\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[None]"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; minimizing\n",
    "(print (itr\n",
    "         (for i in (range 10))\n",
    "         (minimize i)))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "45\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[None]"
      ]
     },
     "execution_count": 17,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; summing up the given values\n",
    "(print (itr\n",
    "         (for i in (range 10))\n",
    "         (sum i)))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "5\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[None]"
      ]
     },
     "execution_count": 18,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; counting not nil(False) form\n",
    "(print (itr\n",
    "         (for i in (range 10))\n",
    "         (count (= (% i 2) 0))))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "0\n",
      "Escape!\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[None]"
      ]
     },
     "execution_count": 19,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; escape with sexp value\n",
    "(print (itr\n",
    "         (for i in (range 10))\n",
    "         (print i)\n",
    "         (return \"Escape!\"))) "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Thanks, but maybe not this time.\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[None]"
      ]
     },
     "execution_count": 20,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";;escape from initially clause\n",
    "(print (itr\n",
    "         (initially\n",
    "           (return \"Thanks, but maybe not this time.\"))\n",
    "         (for i in (range 10))\n",
    "         (heavy-function)))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "45\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[None]"
      ]
     },
     "execution_count": 21,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";;escape from finally clause\n",
    "(print (itr\n",
    "         (for i in (range 10))\n",
    "         (append (list (range i)) into ret-list)\n",
    "         (finally\n",
    "           (return (len ret-list)))))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "scrolled": false,
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "i: 0\n",
      "j: 0\n",
      "100\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[None]"
      ]
     },
     "execution_count": 22,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; global escape with tag\n",
    "(print (itr :top-level\n",
    "             (for i in (range 10))\n",
    "             (print \"i:\" i)\n",
    "             (itr\n",
    "               (while True)\n",
    "               (itr\n",
    "                 (for j in (range 5))\n",
    "                 (print \"j:\" j)\n",
    "                 (return-from ':top-level 100)))))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1\n",
      "2\n",
      "3\n",
      "4\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 23,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; destructuring bind in with clause\n",
    "(itr\n",
    "  (with (a b (c d)) = '(1 2 (3 4)))\n",
    "  (print a)\n",
    "  (print b)\n",
    "  (print c)\n",
    "  (print d)\n",
    "  (break))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "0 5\n",
      "1 6\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 24,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; destructuring bind in for clause part 1\n",
    "(itr\n",
    "  (for i in (range 2))  \n",
    "  (for (a b) = [i (+ i 5)])\n",
    "  (print a b))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "a 10\n",
      "b 20\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 25,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; destructuring bind in for clause part 2\n",
    "(itr\n",
    "  (for (k v) in (.items {\"a\" 10 \"b\" 20}))\n",
    "  (print k v))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {
    "autoscroll": false,
    "ein.tags": "worksheet-0",
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "0 0 0\n",
      "1 1 1\n",
      "2 2 2\n",
      "3 3 3\n",
      "4 4 4\n",
      "5 5 5\n",
      "6 6 6\n",
      "7 7 7\n",
      "8 8 8\n",
      "9 9 9\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[[]]"
      ]
     },
     "execution_count": 26,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    ";; destructuring bind in for clause: example\n",
    "(itr\n",
    "  (for ((a b) c) in (reduce zip [(range 10) (range 10) (range 10)]))\n",
    "  (print a b c))"
   ]
  }
 ],
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