From 56bab8f861d4284a288a94b89477675dedcb5f0b Mon Sep 17 00:00:00 2001
From: NunoSempere <nuno.sempere@protonmail.com>
Date: Sun, 28 Nov 2021 15:33:19 +0000
Subject: [PATCH] feat: Added expected and maximum number of comparisons

---
 .gitignore            |  3 +++
 lib/comparisonView.js | 40 +++++++++++++++++++-------------
 lib/utils.js          | 54 ++++++++++++++++++++++++++++++++-----------
 3 files changed, 67 insertions(+), 30 deletions(-)

diff --git a/.gitignore b/.gitignore
index e87ca9f..04016ed 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,9 @@
 # personal notes
 Notes.md
 
+# hacky upload script
+lib/pushToMongoManually.js
+
 # convenience old folder
 pages/.old/*
 pages/.old
diff --git a/lib/comparisonView.js b/lib/comparisonView.js
index 99ecd96..0139769 100644
--- a/lib/comparisonView.js
+++ b/lib/comparisonView.js
@@ -11,6 +11,7 @@ import { DisplayAsMarkdown } from './displayAsMarkdown'
 import { CreateTableWithDistances } from './findPaths'
 import { TextAreaForJson } from "./textAreaForJson"
 import { pushToMongo } from "./pushToMongo.js"
+import { maxMergeSortSteps, expectedNumMergeSortSteps } from "./utils.js"
 
 /* Helpers */
 let increasingList = (n) => Array.from(Array(n).keys())
@@ -40,10 +41,6 @@ export default function ComparisonView({ listOfElementsForView }) {
   // State
   let initialListOfElements = listOfElementsForView.map((element, i) => ({ ...element, id: i }))
   let initialPosList = increasingList(listOfElementsForView.length) // [0,1,2,3,4]
-  //let listOfElements = listOfElementsForView.map((element, i) => ({...element, id: i}))
-  //let list = increasingList(listOfElementsForView.length) // [0,1,2,3,4]
-
-  //let initialComparePair = [list[list.length-2], list[list.length-1]]
   let initialComparePair = [initialPosList[initialPosList.length - 2], initialPosList[initialPosList.length - 1]]
   let initialSliderValue = 1
   let initialReasoning = ''
@@ -54,6 +51,13 @@ export default function ComparisonView({ listOfElementsForView }) {
   let initialShowAdvancedOptions = false
   let initialShowComparisons = false
   let initialShowChangeDataSet = false
+  let initialNumSteps = 0;
+  let maxSteps = maxMergeSortSteps(listOfElementsForView.length)
+  let expectedSteps = expectedNumMergeSortSteps(listOfElementsForView.length)
+
+  //let listOfElements = listOfElementsForView.map((element, i) => ({...element, id: i}))
+  //let list = increasingList(listOfElementsForView.length) // [0,1,2,3,4]
+  //let initialComparePair = [list[list.length-2], list[list.length-1]]
 
   const [listOfElements, setListOfElements] = useState(initialListOfElements)
   const [posList, setPosList] = useState(initialPosList)
@@ -72,6 +76,8 @@ export default function ComparisonView({ listOfElementsForView }) {
   let [showAdvancedOptions, changeShowAdvanceOptions] = useState(initialShowAdvancedOptions);
   let [showComparisons, changeShowComparisons] = useState(initialShowComparisons);
   let [showChangeDataSet, changeshowChangeDataSet] = useState(initialShowChangeDataSet);
+  let [numSteps, increaseNumSteps] = useState(initialNumSteps);
+
 
   let restart = (posList) => {
     setToComparePair([posList[posList.length - 2], posList[posList.length - 1]])
@@ -195,6 +201,7 @@ export default function ComparisonView({ listOfElementsForView }) {
 
     setSliderValue(1)
     setReasoning('')
+    increaseNumSteps(numSteps+1)
     if (successStatus) {
       let jsObject = nicelyFormatLinks(quantitativeComparisons, listOfElements)
       pushToMongo(jsObject)
@@ -216,6 +223,7 @@ export default function ComparisonView({ listOfElementsForView }) {
         <h1 className="text-6xl font-bold">
           Utility Function Extractor
         </h1>
+        <p>{`${numSteps} out of ~${expectedSteps} (max ${maxSteps}) comparisons`}</p>
 
         <div className={`${isListOrdered ? "hidden" : ""}`}>
           <div className="flex flex-wrap items-center max-w-4xl sm:w-full mt-10">
@@ -237,17 +245,17 @@ export default function ComparisonView({ listOfElementsForView }) {
                 <label>
                   {`... is `}
                   <br />
-                    <input
-                      type="number"
-                      className="text-center text-blueGray-600 bg-white rounded text-lg border-0 shadow outline-none focus:outline-none focus:ring w-8/12 h-10 m-2"
-                      value={sliderValue}
-                      onChange={(event) => {
-                        //console.log(event)
-                        //console.log(event.target.value)
-                        setSliderValue(event.target.value)
-                      }}
+                  <input
+                    type="number"
+                    className="text-center text-blueGray-600 bg-white rounded text-lg border-0 shadow outline-none focus:outline-none focus:ring w-8/12 h-10 m-2"
+                    value={sliderValue}
+                    onChange={(event) => {
+                      //console.log(event)
+                      //console.log(event.target.value)
+                      setSliderValue(event.target.value)
+                    }}
 
-                    />
+                  />
                   <br />
                   {`times as valuable as ...`}
                 </label>
@@ -279,8 +287,8 @@ export default function ComparisonView({ listOfElementsForView }) {
           <label className="">
             Reasoning (optional):
             <textarea className="mt-2 px-3 py-4 placeholder-blueGray-300 text-blueGray-600 relative bg-white bg-white rounded text-base border-0 shadow outline-none focus:outline-none focus:ring w-full"
-              value={reasoning} 
-              onChange={(event) => setReasoning(event.target.value)} 
+              value={reasoning}
+              onChange={(event) => setReasoning(event.target.value)}
             />
           </label>
           <br />
diff --git a/lib/utils.js b/lib/utils.js
index 1b3b4d7..2e4f9a0 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -8,37 +8,63 @@ export const transformSliderValueToPracticalValue = id
 export const _transformSliderValueToActualValue = value => 10 ** value //>= 2 ? Math.round(10 ** value) : Math.round(10 * 10 ** value) / 10
 export const toLocale = x => Number(x).toLocaleString()
 export const truncateValueForDisplay = value => {
-    if(value > 10){
+    if (value > 10) {
         return Number(Math.round(value).toPrecision(2))
-    }else if(value > 1){
+    } else if (value > 1) {
         return Math.round(value * 10) / 10
-    } else if(value < 1){
-        
+    } else if (value < 1) {
+
     }
 }
 export const _transformSliderValueToPracticalValue = value => truncateValueForDisplay(transformSliderValueToActualValue(value))
 
-export function numToAlphabeticalString(num){
+export function numToAlphabeticalString(num) {
     // https://stackoverflow.com/questions/45787459/convert-number-to-alphabet-string-javascript/45787487
-    num=num+1
+    num = num + 1
     var s = '', t;
     while (num > 0) {
         t = (num - 1) % 26;
         s = String.fromCharCode(65 + t) + s;
-        num = (num - t)/26 | 0;
+        num = (num - t) / 26 | 0;
     }
     return `#${s}` || undefined;
 }
 
-export function formatLargeOrSmall (num) {
-    if(num > 1){
+export function formatLargeOrSmall(num) {
+    if (num > 1) {
         return toLocale(truncateValueForDisplay(num))
-    }else if(num > 0){
-        return num.toFixed(-Math.floor(Math.log(num)/Math.log(10))+1);
-    }else if(num < -1){
-        return num.toFixed(-Math.floor(Math.log(-num)/Math.log(10))+1);
-    }else{
+    } else if (num > 0) {
+        return num.toFixed(-Math.floor(Math.log(num) / Math.log(10)) + 1);
+    } else if (num < -1) {
+        return num.toFixed(-Math.floor(Math.log(-num) / Math.log(10)) + 1);
+    } else {
         return toLocale(num)//return "~0"
 
     }
 }
+const firstFewMaxMergeSortSequence = [0, 0, 1, 3, 5, 8, 11, 14, 17, 21, 25, 29, 33, 37, 41, 45, 49, 54, 59, 64, 69, 74, 79, 84, 89, 94, 99, 104, 109, 114, 119, 124, 129, 135, 141, 147, 153, 159, 165, 171, 177, 183, 189, 195, 201, 207, 213, 219, 225, 231, 237, 243, 249, 255, 261, 267, 273, 279, 285]
+
+export function maxMergeSortSteps(n) {
+    if (n < firstFewMaxMergeSortSequence.length) {
+        return firstFewMaxMergeSortSequence[n]
+    } else {
+        return maxMergeSortSteps(Math.floor(n / 2)) + maxMergeSortSteps(Math.ceil(n / 2)) + n - 1
+    }
+}
+
+export function expectedNumMergeSortSteps(n) {
+    // https://cs.stackexchange.com/questions/82862/expected-number-of-comparisons-in-a-merge-step
+    // n-2 for each step, so (n-2) + (n-2)/2 + (n-2)/4 + ...
+    // ~ 2*(n-2) -1 = 2*n - 3
+    if (n == 0) {
+        return 0
+    } else if (n == 1) {
+        return 0
+    } else if (n == 2) {
+        return 1
+    } else if (n == 3) {
+        return 2
+    } else {
+        return Math.ceil((n ** 2) / (n + 2)) + expectedNumMergeSortSteps(Math.ceil(n / 2))
+    }
+}
\ No newline at end of file